Re: [Libav-user] Get list of supported video types
Simon Daniels writes:
> Is it possible to call an ffmpeg API to get the list of video types
> that it supports for decoding and encoding?
See opt_codecs() in cmdutils.c ('ffmpeg -codecs').
> I'd want the associated file extensions as well.
Decoders and encoders are not associated to file extensions.
Carl Eugen
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Re: [Libav-user] About using FFmpeg libraries
writes: > My name is Artem, I present AIMP Project. > AIMP is free audio player for Microsoft Windows with closed sources. > > We would like to use binaries of FFmpeg libraries in our application as > additional decoders set. Can we use binaries of FFmpeg in closed-source > project This may be possible. > (without any modifications of source code)? This does not make any difference at all. > Under what conditions? > Can we distribute FFmpeg binaries in one package with our program? Please read (and understand) the LGPL to get all information you need about the obligations when distributing binaries of LGPL'd software. Among them are: Do not use GPL-code (it does not like closed-source projects) Inform your users that your software uses code from FFmpeg Show the LGPL to your users Do not claim that FFmpeg belongs to you - we have had enough of that;-) Share the exact source code (including some build instructions) of FFmpeg that you used. This has to be done in a way that allows your users to replace the binary of FFmpeg that comes with your software with a self-compiled version (for example by changing code in the FFmpeg sources that you provide). > Of course, we provide information about using libdca in about box of the > program and EULA. libdca != FFmpeg Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] H264 1 frame delay.
Victor Moray writes: > I'm using FFMPEG through VLC to receive and decode H264 video from a hardware > video encoder over RTSP on a local network. The hardware encoder manufacturer > provides an ActiveX control which is used to receive and decode video from the > encoder, and the latency is minimal. However, through FFMPEG there is always a > 1 frame delay between what the manufacturer-provided control shows, and what > VLC shows. Do you see the same latency if you use ffplay (not using vlc)? Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] Unimplemented container channel layout Bug
Bruce Wheaton writes: > I have a fairly simple .mov with one track of stereo PCM 16-bit audio. > Quicktime has the channels tagged as left and right. When I open the file with > libavformat & libavcodec, I get the 'Unimplemented container channel layout' > warning and it won't play properly (in my app). Does it play properly with ffplay (or MPlayer)? Can it be read by ffmpeg? Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] Unimplemented container channel layout Bug
Bruce Wheaton writes: > > Does it play properly with ffplay (or MPlayer)? > > Can it be read by ffmpeg? > > I don't have ffplay active now, I'll enable it. FFMPEG fails as below. The > resulting video is empty. > $ ./ffmpeg -i Opening\ Video\ PJ\ 720p29.97.mov test.mov [...] > encoder 'aac' is experimental and might produce bad results. > Add '-strict experimental' if you want to use it. You could either "Add '-strict experimental'" to your command line (before test.mov) or use test.avi instead of test.mov. Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] Unimplemented container channel layout Bug
Bruce Wheaton writes: > Sorry, I can't find anywhere, but do ffplay and ffmpeg configure the audio > codec context at all? > Obviously, they configure resampling etc., but do they tell the codec context > to do anything different depending on layout? If you output to alsa, yes. The audio encoders - esp (E)AC-3 - have to guess the layout if it is not specified. Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] libavformat doesnt recognize h264 stream in mpegts, but vlc does
Andrey Utkin writes: > The dump is: ftp://golosimperii.org/tmp/dump.ts Fixed in current git head, thank you for the sample! Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] Is an avfilter applied before encoding/decoding or after that
Harry Ma writes: > I wonder when a avfilter is applied? is it applied before encoding/decoding or > after that? I don't think a (video) filter could do anything useful if it is not applied after decoding and before encoding. Please do not cross-post, this is considered rude, Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] Request: RGBA support for huffyuv decoder
Robert Nagy writes: > As title the title says. I would like to request that RGBA support was added > to > the huffyuv decoder. Could you provide a sample (one frame) that contains RGBA huffyuv but cannot be decoded correctly with FFmpeg? Please add information on how it can be decoded correctly... Does the FFmpeg native encoder work? (=Is it only a decoder problem or decoder and encoder?) (I thought I found this bug some days ago, but without a sample it is more difficult to test, and I was too lazy to try to produce one myself.) Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] Request: RGBA support for huffyuv decoder
Robert Nagy writes: > As title the title says. I would like to request that RGBA support was added > to > the huffyuv decoder. I found a sample: http://samples.mplayerhq.hu/V-codecs/HuffYUV/camera2_hfyu32.avi Decoding works fine, encoding RGBA (ff)huffyuv is broken afaict. Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] Missing Header on MP2/MPEG-TS (audio bad)
Hi! RichardP writes: > Below is the trace of decode_audio3() with Decoded_bytes being its > return.(inQueue is the packet.size) If I record the original stream and then > transcode using ffmpeg there are no problems... when I do the same, I get > millions of "Missing Headers" and no audio is transcoded. (below is the > first instance of it going bad.. and it does not appear to recover) Perhaps you need to use the mpegaudio parser? Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] disabling probe for specific streams
aviad rozenhek writes: > I want to disable probing for streams which arent video or audio. > is there a way to do it? Does -analyzeduration help? [...] > avprobe version v0.7-749-g2214191, Copyright (c) 2007-2011 the Libav This is very broken and unsupported here. Please see http://ffmpeg.org/download.html to find out how to download FFmpeg. Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] Write raw RGB frames to file
<=?iso-8859-1?Q?Max_G=F6ttner_-_d.stream?=> writes: > >I read frames from input files, use swscale to have raw rgb images. I would > >like to write these images to a Mkv container, keeping the frames in raw rgb. > >How can this be obtained? > >What codec do I have to use? > >I tried CODEC_ID_BMP but I couldn't find any ressource that tells me what > >settings go together with a specific codec. I suspect you are searching for CODEC_ID_RAWVIDEO. Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] Write raw RGB frames to file
<=?iso-8859-1?Q?Max_G=F6ttner_-_d.stream?=> writes: > >I suspect you are searching for CODEC_ID_RAWVIDEO. > > But it seems to me that rawvideo is yuv420 only. Why do you think so? I believe that for the sake of your question it supports "all" pix_fmts. (It does not support all but all relevant ones.) Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] Unable to compile i386 compatible ffmpeg dylibs on Mac OS X
Simon Daniels writes: > I'm running 64-bit Lion but I need to compile a 32-bit version of > ffmpeg because another library I'm using is only available as 32-bit. > I've tried a number of different configurations but they're all giving > me errors. Here's what I've tried: > > ./configure --disable-static --enable-shared --disable-outdev=sdl > --disable-bzlib --disable-libfreetype --disable-libopenjpeg > --enable-zlib --enable-runtime-cpudetect --arch=i386 > --extra-cflags="-arch i386" --extra-ldflags="-arch i386" > --target-os=darwin --enable-cross-compile What's wrong with "./configure --cc='gcc -m32'"? Or does this not work on OSX? If it still fails, please run make again, then run make V=1 and post the complete, uncut output of make V=1. (Please do not post the complete uncut output of your first call to make.) Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] Unable to compile i386 compatible ffmpeg dylibs on Mac OS X
Simon Daniels writes: > gcc -m32 -I. -I"/Users/user/Downloads/ffmpeg-0.8.7" -D_ISOC99_SOURCE > -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -DHAVE_AV_CONFIG_H -std=c99 > -mdynamic-no-pic -fomit-frame-pointer -g -Wdeclaration-after-statement > -Wall -Wno-parentheses -Wno-switch -Wdisabled-optimization > -Wpointer-arith -Wredundant-decls -Wno-pointer-sign -Wcast-qual > -Wwrite-strings -Wundef -Wmissing-prototypes -Wno-pointer-to-int-cast > -O3 -fno-math-errno -mllvm -stack-alignment=16 -MMD -MF > libavcodec/h264_cabac.d -MT libavcodec/h264_cabac.o -c -o > libavcodec/h264_cabac.o libavcodec/h264_cabac.c > cc1: error in backend: Ran out of registers during register allocation! > make: *** [libavcodec/h264_cabac.o] Error 1 Afaict, this is a compiler error;-( Could you add the output of gcc-v? Does it make any difference if you use "./configure --cc='clang -m32'"? If you just want to compile FFmpeg, I suggest you copy above command (from gcc to cabac.c), paste it and remove -fomit-frame-pointer (or replace it with -fno-omit-frame-pointer). The compilation of h264_cabac.o should succeed and you can run "make" to compile the rest of the project. Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] Write raw RGB frames to file
<=?iso-8859-1?Q?Max_G=F6ttner_-_d.stream?=> writes: > Is there any reference or example that tells me, which attributes of the > AVCodecCtx have to be set in order to get the rawvideo-encoding work? Assuming you are only interested in mkv: Did you look into matroskaenc.c? I suspect you have to set an appropriate codec_tag for the pix_fmt. (And since I did not find a documentation for KaxCodecColourSpace on matroska.org, it is possible that not all applications will support all tags FFmpeg uses.) Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] Write raw RGB frames to file
Carl Eugen Hoyos writes: > <=?iso-8859-1?Q?Max_G=F6ttner_-_d.stream?=> writes: > > > Is there any reference or example that tells me, which attributes of the > > AVCodecCtx have to be set in order to get the rawvideo-encoding work? > > Assuming you are only interested in mkv: Did you look into matroskaenc.c? > I suspect you have to set an appropriate codec_tag for the pix_fmt. > (And since I did not find a documentation for KaxCodecColourSpace on > matroska.org, it is possible that not all applications will support all tags > FFmpeg uses.) http://www.matroska.org/technical/specs/index.html "ColourSpace" Looking at http://fourcc.org/rgb.php at least RGBA should work fine. Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] Force low-delay handling? question + feature suggestion
Camera Man writes: > would it work to patch ff_h264_decode_init() and decode_postinit() to also > check the AV_DISCARD mode, and if we are discarding B and/or nonref frames, > would set avctx->has_b_frames=0 and low_delay=1 ? I don't know but I suggest that you write such a patch (optionally test it on streams with B-frames) and post it on ffmpeg-devel where it can be discussed. Carl Eugen PS: Your mail is nearly unreadable here. In case you are sending HTML-mails: Please don't do that. ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] Security Camera App - multiplexing and visual timestamps
Camera Man writes: > e.g., for (2) there might be a way to multiplex macroblocks from > different pictures, without actually decoding them to image and > re-encoding (thus avoiding the motion compensation estimation, > which is super expensive, and the effects of requantization) > for (1), there might be a way to increase the picture size to e.g > 1280x1000, and somehow encode the timestamp into the new 40 pixels > (again, without decoding and re-encoding everything?) While both may be possible in theory (I don't know) it would certainly require some effort to program this. (It is not supported by current FFmpeg.) > And assuming that I have to re-encode, is there a some > hw-assisted encoder supported by ffmpeg that would be able to do > this encoding in real time and without eating too many watts? I thought for any given hardware encoder, there is a software encoder that is both faster (fps) and produces better quality (but I did not test myself) ;-) But seriously: What encoder are you using with what options? I would be surprised if that couldn't be accelerated. And no, FFmpeg does not support hardware encoders. Apart from "patch welcome", I assumed above is the reason nobody sent one. Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] Unable to compile i386 compatible ffmpeg dylibs on Mac OS X
Simon Daniels writes: > Thanks guys but omitting -fomit-frame-pointer in the last gcc call or > replacing it with -fno-omit-frame-pointer resulted in the same error > (trying both gcc and clang). [...] > make V=1 of clang is: > clang -m32 -I. -I"/Users/user/Downloads/ffmpeg-0.8.7" -D_ISOC99_SOURCE > -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -DPIC -DHAVE_AV_CONFIG_H > -std=c99 -mdynamic-no-pic -fomit-frame-pointer -fPIC -g > -Wdeclaration-after-statement -Wall -Wno-parentheses -Wno-switch > -Wdisabled-optimization -Wpointer-arith -Wredundant-decls > -Wno-pointer-sign -Wcast-qual -Wwrite-strings -Wtype-limits -Wundef > -Wmissing-prototypes -Wno-pointer-to-int-cast -O3 -fno-math-errno > -fno-signed-zeros -mllvm -stack-alignment=16 -Qunused-arguments -MMD > -c -o libavcodec/h264_cabac.o libavcodec/h264_cabac.c This does not look as if you omitted -fomit-frame-pointer or replaced it with -fno-omit-frame-pointer ;-( Please: Configure with one of the mentioned configure lines (either gcc or clang, it is possible that one of them fails at another point in the compilation, to save time you can test this preliminary with configure --disable-decoder=h264) Run make (it fails) Run make V=1 Copy everything from "gcc"/"clang" to "libavcodec/h264_cabac.c" and paste it into your shell. Add -fno-omit-frame-pointer to the end (this should be sufficient since iirc later compiling options overwrite earlier ones) / remove -fomit-frame-pointer from the pasted command (this may actually not work because I believe -O3 implies -fomit-frame-pointer) / replace -fomit-frame-pointer with -fno-omit-frame-pointer. Press enter. If the compilation does not succeed, report back, there are other things you can try. Run make. Carl Eugen PS: Please use current git head, the releases are only for distributors, and I suspect you are a user. ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] Creating a standard MP4 file using exisiting H264 Elementary stream
Shachar Arieli writes: > I have an application which is required to create a video file (only video no > audio) which is readable by the Microsoft media player (latest version). Which version? Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] Unable to compile i386 compatible ffmpeg dylibs on Mac OS X
Simon Daniels writes: > Here's what I did this time. I'm sticking to ffmpeg-0.8.7 because I am > a distributor. Does it work with current git head? If yes, we could backport the change... > 1. Ran ./configure --cc="gcc -m32" --disable-decoder=h264 Should have been --disable-decoder=h264,svq3 --disable-parser=h264 (sorry for not testing myself). [...] > 4. Added -fno-omit-frame-pointer to end and ran gcc -m32 -I. > -I"/Users/user/Downloads/ffmpeg-0.8.7" -D_ISOC99_SOURCE > -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -DHAVE_AV_CONFIG_H -std=c99 > -mdynamic-no-pic -fomit-frame-pointer -g -Wdeclaration-after-statement > -Wall -Wno-parentheses -Wno-switch -Wdisabled-optimization > -Wpointer-arith -Wredundant-decls -Wno-pointer-sign -Wcast-qual > -Wwrite-strings -Wundef -Wmissing-prototypes -Wno-pointer-to-int-cast > -O3 -fno-math-errno -mllvm -stack-alignment=16 -MMD -MF > libavcodec/h264_cabac.d -MT libavcodec/h264_cabac.o -c -o > libavcodec/h264_cabac.o -fno-omit-frame-pointer > libavcodec/h264_cabac.c You can try to replace -O3 with -O2 (or -O1) Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] Unable to compile i386 compatible ffmpeg dylibs on Mac OS X
Simon Daniels writes: > 4. Repeated #2 and #3 with clang on current git head and got the same errors Next tests: Could you provide the output of $ grep HAVE_EBX_AVAILABLE config.h $ grep HAVE_EBP_AVAILABLE config.h (I assume it is identical for clang and gcc, is it?) And please test versions 324b8adc and 08d2cee4 to make sure this is not a regression. Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] Write raw RGB frames to file
<=?iso-8859-1?Q?Max_G=F6ttner_-_d.stream?=> writes: > Resulting files seem ok, when analyzing them with mkvinfo (from mkvtoolnix), > filesize is also like you'd expect. However no player is able to replay > them. mplayer -demuxer lavf ? > Libav succeeds in opening and recognizing the format but fails in > decoding and delivers the following message: Command line and complete, uncut console output missing. And please see http://ffmpeg.org/download.html to know how to get FFmpeg versions that are supported on this mailing list. Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] about ffmpeg's lgpl
Alex Cohn writes: > On Mon, Dec 5, 2011 at 12:30, kunkka cai wrote: > > Hi, > > I'm developing a free (in price) software which should be able to play mp3 > > files. I know ffmpeg is a great codec, so I want my application to link > > against it. > > Actually I have built some Dlls (avcodec-52.dll, avformat-52.dll, > > avutil-50.dll) without "--enable-gpl" and without "--enable-nofree". And my > > application that linking against those dlls works well. > > Since I don't want my software to be open-source or become under LGPL/GPL. > > That means I don't want to distribute the source code of my application, but > > I can distribute the source code of the ffmpeg dlls I use. > > Yes, you should provide the source code with any build scripts you use. I am not a native speaker but I wonder if the word "should" (here and below) is the right choice... > > Can I compress them(my application and those dlls) together into a single > > installation file and distribute it on the internet? Or what can I do? > > Yes, you can distribute the binaries of ffmpeg you built, but: > > - The end user should easily find the licensing info for libav > components used in your distribution; The licensing information actually has to be shown to the user. > - The end user should easily find the source code and build > scripts/instructions to rebuild these components if they wish. > > The ultimate solution is to include these sources in your > distribution; after all, it's only around 10 MByte zipped. > > If bundling the sources is not possible or not relevant in your case, > you can keep them separate, but you should provide certain guarantees > that they will be easily and reliably available to anybody who has > your product installed (IMHO this means that you cannot rely on a free > public download site for that). If you don't want to bundle the FFmpeg sources with your product, I strongly suggest you offer them on the same download server and from the same download page where the application is provided (so far, nobody could suggest a better interpretation to "accompany" as required by the license). > - The end user should be able to replace the av libraries in his > installation with the versions built by them. Which is easy if you use FFmpeg shared libraries (dlls). > You carry no obligation that this will work unless they reproduce > precisely your instructions and use the sources that you supplied. > (For example, if they decide to upgrade to latest version of ffmpeg, > or to perform a debug build, whatever). > > This requirement may become tricky or even prohibitive in some > situations (e.g. on iOS platform), but for a typical Windows > application it's enough to write a short instruction for replacing the > ffmpeg dlls (and test it yourself !!). Exactly. (iOS seems to require static linking, some companies offer the object files of their proprietary applications to allow re-linking against different FFmpeg versions.) > Enjoy, > Alex Cohn > > Disclamer: I am not a lawyer, and the advise above is not legally > bounding. In case of miniscule doubt, consult your lawyer who > specializes in open source software. Same here. Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] about ffmpeg's lgpl
Alex Cohn writes: > PS I often find the reactions to licensing questions on this and other > open software lists intimidating. I believe that open software should > (pun intended) be promoted, among other ways, by making it easier to > understand and use, even at risk of somebody unintentionally > misunderstanding of some legal fine print. If, to use free software, > the developers must (pun intended) pay the lawyers, maybe it would be > healthier (and cheaper) to pay for software? ;-) I had contact with many companies / individuals who use FFmpeg in their commercial product and do not care the slightest about the (L)GPL. You can find some email exchange on gmane in ffmpeg.issues, it should show in an impressive way that they are very often simply refusing to read the license, but ask why we require - for example - source code distribution. So apart from the fact that working on the code (or answering actual user questions) is much more fun, yes, I am sometimes short-tempered when it comes to license questions. (Note that I do not remember anybody ever asking "Is it sufficient if I do this and that to fulfil this requirement of the license?" but always "Can I use FFmpeg in my commercial product if I do not change the code?") Thank you for your help, Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] Extract cover image from audio files (mp3, m4a)
Kirell Benzi writes: > I'm new to ffmpeg, I would like to know if it is possible to extract an image > embedded in an audio file, aka audio cover and how to do it. Does the output of "ffmpeg -i yourfile" indicate that the images are detected? Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] Playing fragmented mp4 h264/AVC
writes: > Does anyone have an idea what could be the problem? Please provide a sample. Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] Batch trimming commands
Simon Daniels writes: > Oftentimes I need to trim several clips out of the same video. > Unfortunately this means ffmpeg.exe must scan over the same sections > of video over and over again to get to the clip's starting point. A > more efficient way to handle this would be to batch trimming commands. > Maybe something like: ffmpeg -i "original.avi" -ss1 0:10:00 -t1 0:00:30 "output1.avi" -ss2 0:15:00 -t2 0:00:30 "output2.avi". Did you test your command line (without "1" and "2" except "output2.avi")? It works fine here. Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] CoreAudio (CAF/AAC) missing packet table
Chris Ballinger writes: > ffmpeg reports the following: > > [caf0x7fbee284ac00] Missing packet table. It is required when block > size or frame size are variable. Did you try to enable full parsing and set any fixed block size in the demuxer? Text-only mails are preferred here, Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] ffmpeg and comercial licenses..
Dan Stuart writes: > I know that FFmpeg supports libx264. > However, I want to use this in a commercial product. > I know you can get a commercial license for > libx264 from the company CoreCodec, > and we are planning on paying all the legal patent fees. > > Can libx264 be compiled into FFmpeg? > If not, what are my options? > Can it peacfully co-exist with > the LGPL version of FFmpeg libraries? Yes, but all requirements of the LGPL still apply if you distribute the binaries. Please read http://ffmpeg.org/legal.html and ignore "notably libx264". You will have to patch your copy of FFmpeg to be able to fulfil point "1" (you have to remove the "--enable-gpl" requirement for x264 from configure). I believe it would be a good idea if you clearly say in your EULA that you bought a license for x264 but that you distribute FFmpeg under the LGPL. Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] Batch trimming commands
Simon Daniels writes: > On Fri, Jan 6, 2012 at 4:47 AM, Carl Eugen Hoyos wrote: > > Simon Daniels writes: > > > >> Oftentimes I need to trim several clips out of the same video. > >> Unfortunately this means ffmpeg.exe must scan over the same sections > >> of video over and over again to get to the clip's starting point. A > >> more efficient way to handle this would be to batch trimming commands. > >> Maybe something like: ffmpeg -i "original.avi" -ss1 0:10:00 -t1 0:00:30 > > "output1.avi" -ss2 0:15:00 -t2 0:00:30 "output2.avi". > > > > Did you test your command line (without "1" and "2" except "output2.avi")? > > It works fine here. In case this was not clear, I meant: ffmpeg -i "original.avi" -ss 0:10:00 -t 0:00:30 "output1.avi" -ss 0:15:00 -t 0:00:30 "output2.avi". > I tried that and it creates output files with 0 bytes. > > Here was my input: > ./ffmpeg -i "/Users/user/Documents/original.MP4" -vcodec copy -acodec > copy -ss 00:10:10 -t 00:00:30 -vcodec copy -acodec copy -ss 00:24:15 > -t 00:00:30 "/Users/user/Documents/output1.MP4" > "/Users/user/Documents/output2.MP4" That looks very different, and if you would not top-post (which is considered rude here), you would have had a chance to see it yourself. > Here was the output: > ffmpeg version 0.8.git-08d2cee, Copyright (c) 2000-2011 the FFmpeg developers This is old, please try current git head. Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] Questions about using libav in a multi-threaded application
Andrey Utkin writes: > Yes, except if multithreaded decoder/encoder will log something from > its thread pool. > Their multithreading is disabled by default, I don't think this is correct anymore. Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] Problems on TS files
肖波 <13760746839@...> writes: > I called the ffmpeg API to decode video files.But I found that it have > problems for some TS files.During my decode process is running,sometimes the > application crashes. Then please provide a backtrace and a very significantly shorter sample (~5MB, you can cut ts at any point), I do not see any invalid memory access with your sample. Please do not highjack threads (not even your own), it is considered rude here. Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] Encoding in PIX_FMT_YUYV422
writes: > I'm attempting to encode in PIX_FMT_YUYV422 using libavcodec. > It's not clear to me the format of input raw data. I understood that > all pixel should be in 16 Bit format, but in buffer, how should be inserted > data ? That is, if locpFrame is a pointer to an AVFrame, I should insert; > > locpFrame->data[0] => The buffer containing only luma samples (Y0,Y1,Y2..) > locpFrame->data[1] => The buffer containing only Chroma 1 samples > (Cr0,Cr1,Cr2..) > locpFrame->data[2] => The buffer containing only Chroma 2 samples > (Cb0,Cb1,Cb2...) I suspect this would PIX_FMT_YUV422P > or: > > locpFrame->data[0] => The buffer containing packetized samples, > Y0,Cr0,Y1,Cb0,Y2,Cr1,Y3,Cb1 This is approximately PIX_FMT_YUYV422, but I suspect you have Cr and Cb swapped, please see libavutil/pixfmt.h (Or is the comment wrong there?) Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] [libav-user] Using MSVC++ intrinsics
wl2776 writes: > I've added some code to the libavutil/bswap.h which checks for _MSC_VER > macro and in positive case calls MSVC intrincics _byteswap_ushort, > _byteswap_ulong etc, instead of bit operations. I suspect this belongs into libavutil/x86/bswap.h and please send your (clean!) patches to ffmpeg-devel. Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] Encoding in PIX_FMT_YUYV422
Carl Eugen Hoyos writes: > > locpFrame->data[0] => The buffer containing packetized samples, > > Y0,Cr0,Y1,Cb0,Y2,Cr1,Y3,Cb1 > > This is approximately PIX_FMT_YUYV422 I should add that afaict, rawvideo is the only encoder that supports PIX_FMT_YUYV422, so I don't think that is what you want... Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] Encoding in PIX_FMT_YUYV422
writes: > >> locpFrame->data[0] => The buffer containing packetized samples, > >> Y0,Cr0,Y1,Cb0,Y2,Cr1,Y3,Cb1 > > > >This is approximately PIX_FMT_YUYV422, but I suspect you have Cr and Cb > swapped, > >please see libavutil/pixfmt.h > >(Or is the comment wrong there?) [...] > why you state that this is "approximately" PIX_FMT_YUYV422 ? What is unclear about "I suspect you have Cr and Cb swapped"? (But as said, I don't know if the comment in pixfmt.h is correct.) > I read libavutil/pixfmt.h but from this header and from the source code > example it's not clear to me how I should insert data. I start from a raw > image and would compress it in MPEG2 4:2:2 format. As said, you cannot use PIX_FMT_YUYV422 because no encoder supports it. The mpeg2 encoder does support PIX_FMT_YUV422P though. Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] Encoding in PIX_FMT_YUYV422
writes: the comment is not clear > too. It says : > > ///< planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples) > > even though the two Croma are inverted, the difference will be in colors. > If they are swapped (little endian instead of big endian due to the fact > that is in 16 bit format), the final image will have wrong colors. You misunderstand (on average, a pixel uses 16bit, but you cannot relate 16bit data to a specific pixel), there is nothing endian specific about PIX_FMT_YUV422P. > What I haven't understood is how to pass data to encoder. That is, should I > use three different buffers (for luma, Cr and Cb) or a single buffer? For planar formats, you have to provide as many buffers as there are planes, three for PIX_FMT_YUV422P, for packed formats, one buffer is needed. Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] Compressed h264 avc1 frames to transport stream
Valérian writes: > I directly receive compressed h264 avc1 frames that I want to write to a > transport stream. Does it work with ffmpeg (the application)? Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] Compressed h264 avc1 frames to transport stream
Valérian writes: > > > I directly receive compressed h264 avc1 frames that I want to write > > > to a transport stream. > > > > Does it work with ffmpeg (the application)? > > Just tried that out. Doesn't work either. Command line and complete, uncut console output missing. Please set your mailer to "plain text", Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] Compressed h264 avc1 frames to transport stream
Valérian writes: > [h264 @ 0x101031600] non-existing PPS 0 referenced > [h264 @ 0x101031600] decode_slice_header error > [h264 @ 0x101031600] no frame! > [h264 @ 0x10101ae00] Could not find codec parameters (Video: h264) > [h264 @ 0x10101ae00] Estimating duration from bitrate, this may be inaccurate > pipe:: could not find codec parameters > > I use a NSTask with NSPipe. The following arguments are passed to ffmpeg : > NSArray *args = [NSArray > arrayWithObjects:@"-y",@"-f",@"h264",@"-i",@"-",@"-acodec",@"copy", > @"-vcodec",@"copy",@"-vbsf",@"h264_mp4toannexb",@"myoutput.ts", nil]; This is not only hard to parse, but I cannot copy-paste this into my shell... > This would give : > ffmpeg -y -f h264 -i - -acodec copy -vcodec copy -vbsf > h264_mp4toannexb myoutput.ts (I assume you did test that cat file|ffmpeg -i - shows the same output?) Does ffmpeg -i file work? Please upload the sample. Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] Compressed h264 avc1 frames to transport stream
Valérian writes: > http://dl.dropbox.com/u/28482555/output.h264 Which software can read this file? The JVT reference decoder fails. Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] generating blank video frame?
David Henry writes: > I tried just creating an output buffer, same > size I get back from sws_scale() and doing a memset() 0 on it Did you try 0x80 instead? Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] Seeking during trimming command takes quite a while
Simon Daniels writes: > I'm using the -ss and -t flags to trim a section of video out of a > longer original one. As an example, if the video is 60 minutes long, > and I want minutes 50-52, ffmpeg takes quite a while to get to that > point. I'll see something like the following (I know my -ss flag > values don't exactly match my example) > > Users-MacBook-Pro:ffmpeg-0.10 user$ ./ffmpeg -i "Long GOPRO.MP4" > -vcodec copy -acodec copy -ss 0:05:10 -t 0:00:30 "output1.mp4" Your command line asks ffmpeg to decode the complete input file and start encoding / remuxing after 5:10 (for 30 seconds). The faster (but possibly less exact) variant is to seek to 5:10 and start decoding there: ffmpeg -ss 5:10 -i input -vcodec copy -acodec copy out.mp4 (-ss may not always work with -codec copy but I just tested it successfully on a mov trailer.) > ffmpeg version 0.10 Copyright (c) 2000-2012 the FFmpeg developers Completely unrelated to your question: If you are an end user, you are strongly encouraged to always use latest git head instead of a release: git head always contains more features and fixes. Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] Getting to grips with ffmpeg
John Dexter writes: > 2. I had some concerns reading about the legal side, GPL and LGPL. Our > software is totally closed source and while we use LGPL libraries, it > sounded like some parts of ffmpeg are GPL-only. Will this realistically > affect me It is your choice if you compile FFmpeg with support for GPL-parts (which makes the whole library GPL and forbids linking against your proprietary application) or without. So only you know if it affects you or not. (Or in other words: It will only affect you if you want H264 encoding but are not willing to buy a commercial x264 license.) Please consider reading the License Compliance Checklist on http://ffmpeg.org/legal.html and if you think anything is not clear on this page, please report! Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] Getting to grips with ffmpeg
John Dexter writes: > (Or in other words: It will only affect you if you want H264 encoding > but are not willing to buy a commercial x264 license.) > > Sorry, I need to ask about that in more detail after more thought. > There are 2 separate issues here it seems... > > > Whether I can use ffmpeg libraries to encode H264 without making my > entire application GPL? > > Whether I need to pay for a H264 license > Is the situation I can use ffmpeg L-GPL if I pay for a H264 license, > but without buying that license I can only use H264 for full GPL? > Or am I totally misunderstanding the situation? The situation is that if you link your application against a GPL'd library (or against libavcodec linking against a GPL'd library) then your application gets GPL'd itself (or you are not complying with the GPL, making you a copyright violator). The LGPL allows you to link against non-free object files as long as you follow some restrictions - see http://ffmpeg.org/legal.html - so if your H264 encoding library is *not* licensed under the GPL (but a proprietary or "commercial" license) there should be no problem. The remaining questions are certainly not within the scope of this mailing list, please visit http://x264licensing.com/ Please set your mailer to "plain text" instead of html, Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] Getting to grips with ffmpeg
John Dexter writes: > > Please consider reading the License Compliance Checklist on > > http://ffmpeg.org/legal.html and if you think anything is not > > clear on this page, please report! > > Since you mention it, I would prefer a list of what I MUST > do and a list of what you PREFER I do, in terms of > open-source etiquette :) (Not being a native speaker, I wonder if there is some insult hidden in this sentence...) The list contains all things you have to do afaict, and some things that really make a lot of sense if you trying to fulfil the requirements of the LGPL (as opposed to trying very hard not to fulfil its concept and getting away with it). Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] Getting to grips with ffmpeg
Bruce Wheaton writes: > On Feb 5, 2012, at 8:38, Carl Eugen Hoyos > > (Or in other words: It will only affect you if you want H264 > > encoding but are not willing to buy a commercial x264 license.) > > Carl, for my own information - there are also some > 'less important' codecs that are GPL only, correct? Some video filters, the X11 framegrab code and the avs encoder are examples for GPL'd parts of FFmpeg. Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] Getting to grips with ffmpeg
Carl Eugen Hoyos writes: > The list contains all things you have to do afaict, > and some things that really make a lot of sense if you trying > to fulfil the requirements of the LGPL (as opposed to trying > very hard not to fulfil its concept and getting away with it). [About http://ffmpeg.org/legal.html ] I just saw that above is of course not true for point 2 (use dynamic linking) but since using static linking makes conforming to the LGPL more difficult I think it clearly counts as good advice. Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] Getting to grips with ffmpeg
John Dexter writes: > > [About http://ffmpeg.org/legal.html ] > > That page includes "distribute the ffmpeg source code". > IIRC that's not a requirement for LGPL? It is a crystal-clear requirement. Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] G711 Codec support
NITIN GOYAL writes: > I am able to decode the g729 but not g711. Command line and complete, uncut console output missing. And consider providing a sample. Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] Getting to grips with ffmpeg
John Dexter writes: > obviously I have no problem providing source if asked to, You misunderstand: If you don't want to "accompany" your binary distribution with the corresponding source code, you have to add a legally binding written offer that you will provide the source code on request. This may have been useful at a time when there was no internet but expensive discs, to save you from that burden nowadays, we recommend you to ... > and in putting the license in my redistributable. > I read somewhere that including a link to where users could download > the source themselves can be counted as "distributing the source"? ... do exactly this as explained on http://ffmpeg.org/legal.html (because we think you can argue that the corresponding sources "accompany" the binary distribution both if you distribute them together in the same installation package and also if you provide the sources as a separate link next to the download link for your installer. If you don't trust me on this because you interpret "accompany" differently then you will have to add the source code to the installer, remember I am not a native speaker.) > I was very surprised by claims it's a requirement, simply because none > of the LGPL libraries I've used have ever mentioned it in the case of > dynamic linking. Please read http://www.gnu.org/licenses/gpl-faq.html#UnchangedJustBinary and for the sake of our discussion assume that it was written by the very same person who wrote the license. Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] Getting to grips with ffmpeg
Carl Eugen Hoyos writes: > > I read somewhere that including a link to where users could download > > the source themselves can be counted as "distributing the source"? > > ... do exactly this as explained on http://ffmpeg.org/legal.html > (because we think you can argue that the corresponding sources > "accompany" the binary distribution both if you distribute > them together in the same installation package and also if you > provide the sources as a separate link next to the download link > for your installer. Or in other words: I assume that would count as "offering equivalent access" to the source code. Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] FW: AVCodecContext and decoding PCM
Marlon Reid writes: > does the decoder look internally at the input stream and use > the same sample rate and channels as the input stream? This is what I would expect a sane decoder to do, there are exceptions like "request_channels". Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] Encoding depth video from Kinect
Daniel Henell writes: > However there doesn't seem to be any video codec that can handle >8 > bit grayscale video. grep GRAY16 libavcodec/*.c shows jpegls, ffv1 and libopenjpeg as codecs that do support >8 bit grayscale video. Carl EUgen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] Encoding depth video from Kinect
Daniel Henell writes: > I tried encoding the depth frames as ffv1 using the following command: > > ffmpeg -r10 -i data/d-%06d.pgm -sameq -vsync1 -vcodec ffv1 vid.mov > > However I got the following output and errors: > > Incompatible pixel format 'gray16le' for codec 'ffv1', auto-selecting > format 'yuv420p16le' Complete, uncut console output missing. Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] Encoding depth video from Kinect
Daniel Henell writes: > ffmpeg -r10 -i data/d-%06d.pgm -sameq -vsync1 -vcodec ffv1 vid.mov For 16bit encoding, "-coder 1" is needed. (FFmpeg's output tells you anyway.) > Is ffv1 really supporting GRAY16? It was only supported since shorty before you wrote your mail (which I didn't realize), but did not work in all cases: A problem that made encoding difficult (it did not work with above command line) has been fixed, please test current git head! Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] Whats wrong with this select filter?
writes: > BTW i am using FFMPEG on windows with win xp platform. > does it make any causes for such errors? > ffmpeg -i D:\test\1.mpg -vf "select=eq(pict_type\,I)" I know this will not really help you, but both above line and your original single quotes work fine on a Linux shell. Perhaps try MSys? Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] Which video codecs support alpha?
killkenny64 writes: > What format and container would be best to create a video with alpha? I cannot answer this question, but the question in the subject: ffv1, qtrle, png, libopenjpeg and nearly all image formats. > Would this format cause any problems when overlaying it? > Is h264 the only one? I don't think h264 supports alpha (at least x264, the only encoder FFmpeg can use, does not support it). Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] what is the -pix_fmt for AYUV?
writes: > I have listed my pix_fmts available on my encoder but can not work > out what ones match the FOURCC codes used by other applications. > Can someone advise what the rawvideo AYUV equivalent is for ffmpeg > and how I work out what the others are in fourcc. I tried to implement AYUV but found no sample and WMP did not play the files I encoded. Could you provide a sample? Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] in the list of supported Encoder, i will only get the libx264rgb codec but not the libx264
jan hölscher writes: > V libx264 Should be fixed, thank you. Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] need advice on new player
Deron writes: > The other concern is that the way the decklink library is written, the > decklink libavdevice will need to be c++. Does that pose a problem for > the maintainers? The main incentive to me to do it as a libavdevice > would be to get it included in the project (obviously as a conditional > build), but if there is a flat refusal to allow it because it is c++ I'd > like to know that now. This used to be true in the past, but there are (optional) parts of FFmpeg now that require C++. Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] in the list of supported Encoder, i will only get the libx264rgb codec but not the libx264
jan hölscher writes:
> AVCodec *p = NULL;
> int a = 0;
> while ((p = av_codec_next(p))) {
> if (p->encode ) {
There is an additional API now that defines p->encode2() instead.
Please do not top post here, Carl Eugen
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Re: [Libav-user] Using ffmpeg.exe in a project (non-commercial)
John Dexter writes: > On 23 February 2012 12:07, Phil Turmel wrote: > > Finally, whatever the legality, it is at least rude to hijack an open- > > source app's website bandwidth to deliver source code to *your* users. > > Apart from the inherent problem of defining social etiquette within a > legal contract... if I distribute ffmpeg.exe _un-modified_, are the > users MY users or ffmpeg's users? If I _don't_ distribute it but tell > users they need to download it, then who is responsible? You have to tell them where they can download the exact sources you used to compile ffmpeg.exe - therefore you have to provide the source on your own download server, because this is the only way to make sure the sources are really available. If your installer installs ffmpeg.exe on the user's computer, do not forget to inform your users (in your EULA) that you are installing FFmpeg, that FFmpeg is released under the GPL and where to find the authors of FFmpeg (and repeat that for all other projects that you use, like for example x264). Note that all requirements you have to follow make absolutely no difference between commercial and non-commercial projects. Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] DeckLink libavdevice
Deron writes: > Taking Nicolas George's suggestion, I have created a basic > libavdevice for Blackmagic's DeckLink HD-SDI cards. Then please send the patch to ffmpeg-devel where it can be discussed (and later applied). Consider running tools/patcheck over your patch and please note that plain text is heavily preferred over html on all mailing lists. Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] Recommended thread count to record video from rendering software
John Dexter writes: > I have a single-thread application which does 3D rendering; it is a > moderate-heavy user of the single core it uses (~50%). In my quick > tests, recording the rendered output to video using libav is fastest > when I use AVCodecContext::thread_count == 3 on my quad-core PC, but > it's almost identical with it set to 0. I don't know your use case, but you typically have to set thread much higher than num_core if you want maximum performance. Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] AC3 -> LPCM -> MPEG2 PES
Andrey Utkin writes: > Now you talk about your hardware decoder... Maybe you should better > ask straightly what your mission is, like "transcode a movie for > playback on dvd-player "CORPORATION MODEL100500". I thought I am the only one who did not completely understand what the issue is about;-) Pavel, if you have a file that plays on your hardware, please provide complete, uncut console output of "ffmpeg -i input" for that file. Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] question about libavcodec
卜弋天 writes: > you do no want anybody report bug??? I believe that if you look at our bug tracker (and compare it to the trackers of similar projects) you will find out that we are *very* interested in bug reports. Unfortunately, only reproducible bug reports (or those that include information why they are not easily reproducible) and bug reports that include all necessary information (like backtraces and valgrind output) are likely to be fixed. Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] mp2/mp3 missing header at decoding of mpegts file, but only in OS X
Kalileo writes: > Works fine on windows (with any of these files), however on > OS X Lion audio is broken (with every of these files). (Complete, uncut console output when failing missing.) Please try with ./configure --cc=clang (removing the other options), and please try with things like --disable-optimizations or --disable-asm / yasm. Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] mp2/mp3 missing header at decoding of mpegts file, but only in OS X
Kalileo writes: > I downloaded new snapshots of ffmpeg, libx264 and lame Please first test ./configure --cc=clang && make. And please add complete, uncut output that shows the problem. Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] mp2/mp3 missing header at decoding of mpegts file, but only in OS X
Kalileo writes: > I tested it now with > > ./configure --cc=clang --enable-shared > and with > ./configure --cc=clang --disable-optimizations --disable-asm > --disable-yasm --enable-shared Please also test ./configure --cc=clang && make and please provide complete, uncut console output for the failing case. If the problem is not reproducible with ffmpeg (the application) it would be nice if you would mention that. Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] mp2/mp3 missing header at decoding of mpegts file, but only in OS X
Kalileo writes: > > Please also test ./configure --cc=clang && make > > I tried that, but then I cannot link the application, the > linker reports errors referencing > _kCVPixelBufferIOSurfacePropertiesKey and a lot of other > stuff with is in libavcodec/vda.c. These > linker errors do not occur when I add "--enable-shared". I suspect you have to compare the options used for linking ffmpeg (rm ffmpeg.o && make V=1 ffmpeg) with the options your application uses. [...] > In order to run the files though ffmpeg I had ffmpeg > converting the files, which works, and the resulting > files play fine in ffplay. My uneducated guess is that you don't use the parsers, they are needed for many files, but this of course would not explain why it works on other systems. Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] Question with encoding RGB frames into video stream
吴沁凡 writes: > What is the difference between YUV420P and YUVJ420P? YUV420P uses MPEG intensity, meaningful values are from 16 to 239 (16 is as black as 0, 239 as white as 255), YUVJ420P uses values from 0 to 255. Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] Enquiry about I-Frame rate
writes: > ffmpeg -i D:\test\1.mpg > -vcodec libx264 -g 0 d:\Test\11.mp4 I am not sure -vcodec libx264 supports "-g", did you test -vcodec mpeg4 ? Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] Force low-delay handling? question + feature suggestion
Carl Eugen Hoyos writes: > > would it work to patch ff_h264_decode_init() and decode_postinit() to also > > check the AV_DISCARD mode, and if we are discarding B and/or nonref frames, > > would set avctx->has_b_frames=0 and low_delay=1 ? You would have to discard all B-frames (because they require reordering) not only the non-ref ones, i.e. corruption would be possible. > I don't know but I suggest that you write such a patch (optionally test it on > streams with B-frames) and post it on ffmpeg-devel where it can be discussed. Did you write such a patch? Please note that your mails are nearly unreadable: http://ffmpeg.org/pipermail/libav-user/2012-March/001495.html Consider setting your mailer to "plain text". Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] Multiple SWSContext in same process
Balaji B.S writes: > I do understand i am using an age old version 0.5.6.1 of libav. This version is very old and therefore unsupported. Please use current git head from http://ffmpeg.org/download.html - it always contains more features and less bugs than any released version. Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] MKV container with H264 video and Speex Video ?
ashika umanga writes: > I am trying to store H264 stream (x264) and Speex stream > in a MKV container. MKV file created without any errors > but when I play the file ,I cannot hear the audio. (Minimal command line and complete, uncut console output missing.) I just tested and MPlayer plays the resulting files, ffmpeg and vlc fail. Do you have a speex-in-mkv sample that can be decoded with vlc and / or ffmpeg? Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] Problems cross compiling ffmpeg 0.9.1 for windows using ubuntu 11.04 32-bit
Leandro Santiago writes: > I'm trying to cross compile ffmpeg 0.9.1 (I really need > to use this version, because my app still uses the old > API which is broken on 0.10) Could you elaborate? 0.9 and 0.10 are intended to be binary compatible, if there are incompatibilities, this would be a serious bug (that we are not aware of). Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] Problems cross compiling ffmpeg 0.9.1 for windows using ubuntu 11.04 32-bit
Leandro Santiago writes: > The new API om 0.10 replaces old AVFormatParamers, etc. by the AVDict > api... The avio_set_interrupt_cb() iss also broken on 0.10 and, as in > my app I use this function to set a timeout checker to many inputs at > the same time. In 0.10 there's one callback per AVFormat. They are > other examples, but now I remembered only of those ones :) As said, this sounds really important (and is not known afaict), please provide a testcase, I would expect such an important bug to be fixed soon. Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] Problems cross compiling ffmpeg 0.9.1 for windows using ubuntu 11.04 32-bit
Andrey Utkin writes: > I'd try configure options used here > http://win32.libav... Since this packages have several severe problems, please do not suggest them here. http://ffmpeg.zeranoe.com/builds/ is intended to work and supported, please report any problems with it. Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] encoding bitrate wrong
mattes writes: > I then dug out the old lib, re-compiled ffmpeg-0.4.9 on FC15 > and build against that (instead of 0.7.11) Now the problem > with varying bitrate is gone. and the encoder app becomes > usable again. Did you also try with ffmpeg (the application)? Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] get frame type
Zanelli Franco writes: > int got_picture; > int len = avcodec_decode_video2(codecCtx, avFrame, &got_picture, avPacket); > > at this point, is it possible to get the input frame type (intra, P or B > frame)? Did you try to read avFrame->pict_type ? Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] get frame type
Robert Krüger writes: > > Did you try to read avFrame->pict_type ? > > > does this field have any meaning for h.264? I thought a frame could > consist of a mixture of B- P- and I-slices. What is the policy of the > h.264 decoder to set this field currently? I haven't checked recently > but I remember it to have weird values for the h.264 files I checked. Could you point me to the bug report? The decoder sets the value so I would expect it to be correct. Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] Possible Bug in "libspeexdec.c" ??
ashika umanga writes: > I have been try to decode Speex audio for many days without success. This is ticket #1091, consider setting yourself to CC there. (Or simply revert 85469f.) Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] get frame type
Robert Krüger writes: > my question was rather if the field _can_ make sense for h.264 as I > have not found anything in the h.264 spec saying that a frame cannot > contain a mixture of I, P, B (and other) slices. What would the value > of the field then be? Only set to a value, if all slices of the frame > are of the same type (which then should be documented somewhere)? I > don't know if this is relevant for practical purposes, because I do > not know if those streams exist in the wild They definitely do exist - most PAFF samples contain the described mixtures, so I expect the problem exists exactly as you say. Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] Possible Bug in "libspeexdec.c" ??
ashika umanga writes: > I have been try to decode Speex audio for many days without success. Should be fixed in current git head. Thank you, Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] How to encode in Truehd audio in ffmpeg
Ajita Pandey writes: > I want to encode in truehd audio. FFmpeg currently does not support TrueHD encoding. (Patch welcome, you can Google for an experimental MLP encoder as a start.) [...] > ::DISCLAIMER:: This does not make much sense on a public mailing list. Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] getting interlace information
aviad rozenhek writes: > is it possible to know if a video file is progressive or intelaced, > and what type of interlaced (TFF or BFF) is it, by using avprobe > or other libav tool?-- (Only FFmpeg tools are supported on this list, libav tools are known to contain several hundred regressions, some of them security relevant, and can therefore not be supported here.) Some file formats (and/or codecs) store information like progressive / tff / bff in the file, FFmpeg may then show this information. In many cases, this information is completely useless, because you are not interested how the hardware that encoded the picture was set up, but if the output images are actually progressive or not. Where I live, TV broadcasters signal their program as interlaced even if they broadcast progressive content, and it is of course possible to encode interlaced material using an encoder that has been set up to encode progressively. Afaict, only visual inspection tells you if the material is actually interlaced or not. Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] extracting audio
Craig Murray writes: > I'm using ffmpeg to extract a series of jpgs from an avi. > Is it possible to have ffmpeg pull the audio down along > with it, so that I have that as an audio only track? You mean ffmpeg -i input.avi out%5d.jpg out.wav ? Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] extracting audio
Craig Murray writes: > Next question if I'm taking a series of jpgs and converting > them into an avi, how can i embed a .wav file into that avi? ffmpeg -i in%5d.jpg -i in.wav out.avi I am not sure how to concatenate audio, I suggest you first prepare the audio file with another application, then mux it as above. (Or search for the concat: protocol in FFmpeg, I have not used it yet.) Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] Baus - an open source video streaming server
hozone writes: > Website: http://code.google.com/p/baus/ The README and the LICENSE files disagree about the license that you used to published your project. The FFmpeg libraries you used seem outdated. Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] problem with image2 to mov
Craig Murray writes: > I'm having some strange behavior if I try to do the following: > ffmpeg -f image2 -r 60 -i /input-%02.png -i /input.wav out.mov Please provide complete, uncut console output. Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] jpg quality using image2
Craig Murray writes: > From the command line are there are flags to set the jpeg quality -qscale (Note that this is in no way image2-related, you can use the mjpeg-encoder in other containers, and there are many codecs usable in image2 that do not support qscale.) Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] -itoffset issue
Craig Murray writes: > given two one-second sounds I'm trying to concatenate them > using several approaches. You have to use the concat-protocol to concatenate files, it does not work without. Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] DVD playback (VOBs)
Gonzalo Garramuno writes: > Input #0, mpeg, from > '/media/CLASH_OF_THE_TITANS_2010/VIDEO_TS/VTS_01_3.VOB': >Duration: 00:06:19.52, start: 2738.283878, bitrate: 6389 kb/s > Stream #0:0[0x1e0], 29, 1/9: Audio: mp1, 0 channels, s16 If this is an unencrypted file, please provide a sample. Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] DVD playback (VOBs)
Gonzalo Garramuno writes: > On 19/04/12 11:01, Carl Eugen Hoyos wrote: > > If this is an unencrypted file, please provide a sample. > > > > Carl Eugen > > How can I tell if it is unencrypted and unencrypt it? Is audio decoding possible? If the DVD is encrypted, FFmpeg is not the right tool (currently, a patch is being reviewed), mplayer -dumpstream outputs the unencrypted DVD. Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] lossless encoding with FFMPEG
Matthias Bühlmann writes: > I heard that h264 has a lossless encoding mode. Is this true? Yes. [...] > what's my best option to get lossless video encoding with FFMPEG? ffv1 should perform best compared with other internal encoders. Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] How to encode several audio tracks into one file ?
pehache writes: > ffmpeg version 0.7.11, Copyright (c) 2000-2011 the FFmpeg developers This is too old, especially if you are not using the libraries, but the transcoding application. Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
