Re: [Libav-user] IntPtr to Packet data is not woking

I am unable to compile your code, but at first glance you are missing the main loop. The one that would call writeaudiochunk. El feb. 20, 2017 12:41 PM, "Prakash Rokade" escribió: Hiii Gonzalo Garramuño, I have modified the code but there is issue that i am not

Re: [Libav-user] Cached frames

On 24/07/15 15:39, Robin Stevens wrote: If you want to get a rough idea of the amount of caching going on, how about this: when you first start feeding packets into the codec, count how many you've fed in before it starts producing output. That could be a rough indicator. You

Re: [Libav-user] avcodec_open2 returns -22

On 16/06/15 09:06, Kevin J. Brooks wrote: Yes I am. For more information, I am developing on Windoze 7. avcodec_open2 can fail if you lack the library for the codec you want to decode or encode. For example, libx264. The libraries in ffmpeg.zeranoe.com contain all codecs, but they are GPL

Re: [Libav-user] av_register_all() fails

You can build ffmpeg statically into your executable, but it does not change the licence policy. So, no, you can't work around it that way. 2015-04-07 7:31 GMT-03:00 Phil Freeman skylinedri...@hotmail.com: Hi Gonzalo, I probably should have mentioned that I did try the amended linker

Re: [Libav-user] Audio sample rate conversion and fixed frame size

You should take a look at the fifo functions that would cache the audio for you and you would feed the encoder the number of samples you see fit. 2015-01-21 8:31 GMT-03:00 Max Vlasov max.vla...@gmail.com: Hi, When sample rate conversion is needed, one can face another problem. Some codecs

[Libav-user] Animated GIF duration

I want to know how can I retrieve an animated GIF duration (length in frames or seconds). I tried context-duration and stream-duration and both return AV_NOPTS_VALUE. Can somebody help? ___ Libav-user mailing list Libav-user@ffmpeg.org

Re: [Libav-user] libx264 compile problems

On 02/10/14 11:49, Gonzalo Garramuno wrote: I did a git pull to get the latest head. Run configure: $ make distclean $ ./configure --samples=samples --enable-shared --enable-gpl --enable-zlib --enable-libmp3lame --enable-libx264 Never mind. I found out I need to upgrade libx264 to latest

Re: [Libav-user] How to implement RTSP server by libffmpeg?

On 10/07/14 06:33, Psychesnet Hsieh wrote: 2. Who has the sample code or any suggestion, please help me out?? Seems you are missing calling avcodec_encode_video2() to fill the packet with compressed data. ___ Libav-user mailing list

Re: [Libav-user] audio sync issues with h264

On 11/06/14 18:56, Gonzalo Garramuno wrote: I have written a viewer that allows writing h264 video with libx264. However the audio (mp3, ac3 or aac) comes out of sync with the video. The problem seems to be the first 20 frames or so that are not written out to the file. I can reproduce

[Libav-user] audio sync issues with h264

I have written a viewer that allows writing h264 video with libx264. However the audio (mp3, ac3 or aac) comes out of sync with the video. The problem seems to be the first 20 frames or so that are not written out to the file. I can reproduce the problem with the muxing.c example from the

Re: [Libav-user] audio sync issues with h264

On 11/06/14 18:56, Gonzalo Garramuno wrote: I have written a viewer that allows writing h264 video with libx264. However the audio (mp3, ac3 or aac) comes out of sync with the video. The problem seems to be the first 20 frames or so that are not written out to the file. I can reproduce

Re: [Libav-user] Muxing problems: audio extending too far

On 29/05/14 13:08, Gonzalo Garramuno wrote: I have added muxing to my gpl viewer and found some issues. I have now solved the issues. The problem was that c-frame_size was being incorrectly changed for codecs that have CODEC_CAP_VARIABLE_FRAME_SIZE not set. I solved it by adding an audio fifo

[Libav-user] AVCodecContext frame_size

I am trying to mux audio into a movie file using mp3 and one of the conditions is that for that codec CODEC_CAP_VARIABLE_FRAME_SIZE is not set. Currently I receive a frame_size of 1152 samples. However, the audio frames I want to transcode have 1839 samples. I am wondering whether I can use

Re: [Libav-user] undefined reference to av_frame_alloc/free

On 28/05/14 22:36, Jason Blum wrote: Wall of text incoming. Sorry if this is too long. Let me know and I will use a pastebin next time. Below the dashed lines is a series of compiling errors based on a sequence of adding and removing the ffmpeg linking flags in various ways to create a

[Libav-user] Muxing problems: audio extending too far

I have added muxing to my gpl viewer and found some issues. With saving vcodec mpeg4, acodec libmp3lame, my video works fine and audio is in sync. However the audio (without any sound) extends past the video for several hundred frames. The flushing of the audio seems to create this. If I

Re: [Libav-user] undefined reference to av_frame_alloc/free

On 28/05/14 23:46, Jason Blum wrote: I shouldn't need to link avutil explicitly to use av_malloc( ), right? Or has that been changed in more recent ffmpeg versions? No, you must link it. It was always like that. Unfortunately I have no idea what is controlling the linking order in a ROS

Re: [Libav-user] Jpeg encoding

On 26/05/14 10:24, caderbe.mat...@libero.it wrote: Hi, I want to create an ancoder that take a coded jpeg images end create video using MJPEG codec in order to save time and do not encode and recode the images. Can you help me? Matteo ___ Libav-user

Re: [Libav-user] Encode video: Pro Res 422

On 16/05/14 17:02, Info || Non-Lethal Applications wrote: On 16 May 2014, at 19:02, Gonzalo Garramuno ggarr...@gmail.com wrote: On 16/05/14 10:27, Info || Non-Lethal Applications wrote: Hey there, I’m trying to encode a sequence of images into Pro Res 422 in the MOV container. I already had

[Libav-user] Understanding a line in muxing.c

I have trouble understanding what the following line in muxing.c does: /* compute destination number of samples */ dst_nb_samples = av_rescale_rnd(swr_get_delay(swr_ctx, c-sample_rate) + src_nb_samples, c-sample_rate, c-sample_rate, AV_ROUND_UP); I was always expecting that:

Re: [Libav-user] Encode video: Pro Res 422

On 16/05/14 10:27, Info || Non-Lethal Applications wrote: Hey there, I’m trying to encode a sequence of images into Pro Res 422 in the MOV container. I already had a look at the example: muxing.c and it looks promising. However, I can’t figure out how to tell the encoder to use ProRes

[Libav-user] H264 encoding

I have an application that saves an .avi using the default mpeg4 encoder. Since my application is GPL, I wanted to add H264 encoding. I compiled libx264 and linked without any problem. When I try to save with the h264 codec changing the code that works for AV_CODEC_ID_MPEG4 (to

Re: [Libav-user] H264 encoding

I tried modifying muxing.c and that works without problems. Any help or ideas are welcome. Ok. Some more info. The avcodec_video_encode2 returns got_packet false for 18 frames at the beginning. This seems to happen also in muxing.c. My video is very short (40 frames). And 19 frames are

[Libav-user] LRe: H264 encoding

On 14/05/14 15:06, Anshul wrote: It looks like end frames are cached inside, you might need to call avcodec_video_encode2 till u recieve all buffered frames. -Anshul Thanks. I figured it out by myself after I sent the mail. I call avcodec_video_encode2 with a NULL pointer. I am now having

Re: [Libav-user] Saving frame to file

On 03/05/14 17:21, Jorge Lúcio wrote: The output could be BMP or PNG. I've tried to write my own function, but so far the best I could do was to write a black and white version of the frame. It's hard to figure out how the image data is stored on the data field inside the AVFrame. There

Re: [Libav-user] EXR gamma flag patch

On 27/04/14 09:06, wm4 wrote: Wouldn't it be better to make the exr decoder output float frames? That would be the harder but cleaner solution, because we don't have a float pixel format yet, apparently. That would be ideal, but it is something I lack the knowledge (and time) to do as it

Re: [Libav-user] Problems decoding mp3 files

On 27/04/14 19:29, b.mcdon...@sky.com wrote: I have spent the last few weeks learning about libav to try to decode mp3 files so I can create videos with the audio from the mp3 files. Let me know if any more information is required. Thanks Bradley Bradley, more info is required. Can you post

Re: [Libav-user] Problems decoding mp3 files

On 27/04/14 20:03, b.mcdon...@sky.com wrote: Thank you for your response Gonzalo. Maybe my code sample in http://sourceforge.net/projects/mrviewer will help you out. You should look at the file called CMedia_audio.cpp and aviImage.cpp. The viewer plays mp3 and has never needed to call the

Re: [Libav-user] Problems decoding mp3 files

On 27/04/14 20:54, b.mcdon...@sky.com wrote: I've had a look at your code, thanks. It seems you are using av_read_frame which for me crashes with mp3 files as previously described. I have just quickly written some code which has the crashes in when I run it - I hope this can help somebody to

[Libav-user] EXR gamma flag patch

Find attached a first proposal for a patch to the exr reader to support a gamma flag. Currently the half float routine is unoptimized and I will change it in the near future. diff --git a/libavcodec/exr.c b/libavcodec/exr.c index 084025a..59f7dad 100644 --- a/libavcodec/exr.c +++

Re: [Libav-user] muxing MP3 cut short

On 07/04/14 16:49, Gonzalo Garramuno wrote: I am adding muxing to my video player and I am running into a wall. If I use mp3 (libmp3lame) as the audio encoding method, the resulting file has perfect audio that ends up short (like 256 frames). If I use PCM_S16LE, the audio is complete albeit

[Libav-user] muxing MP3 cut short

I am adding muxing to my video player and I am running into a wall. If I use mp3 (libmp3lame) as the audio encoding method, the resulting file has perfect audio that ends up short (like 256 frames). If I use PCM_S16LE, the audio is complete albeit I end up with some stutters in the audio

[Libav-user] Best LGPL codecs

Title says it all. I am wondering what are the best (or some of the best) codecs that are LGPL and that can be used from the ffmpeg API. ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user

Re: [Libav-user] Best LGPL codecs

On 03/04/14 12:52, Gonzalo Garramuno wrote: Title says it all. I am wondering what are the best (or some of the best) codecs that are LGPL and that can be used from the ffmpeg API. This is for both audio (flt) and video (hd). ___ Libav-user mailing

Re: [Libav-user] h264 illegal short term buffer state detected

On 27/03/14 14:23, wm4 wrote: Then you should see the same error when seeking with ffplay. (AFAIK you have to click with the mouse to seek or something.) No, I don't see the error on ffplay. I also don't see the error on other h264 movies. Only in one I am seeing this error. It would be

[Libav-user] h264 illegal short term buffer state detected

After upgrading to 2.1, I am getting in my player for a h264 movie. illegal short term buffer state detected whenever I stop the playback and resume it immediately. When I stop the playback I flush all caches. I am wondering if someone can explain what might be causing it. ffplay seems

Re: [Libav-user] h264 illegal short term buffer state detected

On 27/03/14 11:55, wm4 wrote: If by flushing the caches you mean dropping packet data and/or flushing the decoder just for pausing, you can't do that. I drop the packets and flush the decoder. Either you don't drop/flush anything, or you have to issue a seek to resume playback properly. I do

Re: [Libav-user] How to build static libs for Windows

On 12/03/14 22:23, YIRAN LI wrote: Hi all, I'm looking for a way to generate ffmpeg static libs for Windows (not import .libs + dll) so that my application no longer needs dlls. If I configure with --enable-static --disable-shared, then I can only get .a files (compiled under both MinGW and

Re: [Libav-user] Probing a file

On 13/03/14 03:57, Carl Eugen Hoyos wrote: Gonzalo Garramuno ggarra13@... writes: I can open a context and see the return value. However, this returns true for image formats like jpeg, png, and others and I find those handled better with other libraries. Then remove image2 from your

Re: [Libav-user] Probing a file

On 13/03/14 12:15, wm4 wrote: Personally I just use av_probe_input_format2() and accept the result only if it's at least AVPROBE_SCORE_MAX / 4 + 1, which is documented as the recommended limit. I also don't set the filename, so no extension matching is performed. (Although I do a second pass

[Libav-user] Probing a file

I am wondering, in code, what's the most reliable way to probe a file to see if ffmpeg will open it. I can open a context and see the return value. However, this returns true for image formats like jpeg, png, and others and I find those handled better with other libraries. Is there a way to

Re: [Libav-user] EXR channel support?

On 15/02/14 04:56, Paul B Mahol wrote: On 2/15/14, Paul B Mahol one...@gmail.com wrote: Also the layer option is not used at all Yes, I know. I tried just printing it with av_log and it crashes with segfault. The layer option works fine command-line (it asks for a string), but the

Re: [Libav-user] EXR channel support?

On 15/02/14 04:56, Paul B Mahol wrote: Also the layer option is not used at all Here's a patch with layer being printed that segfaults. It seems the field is never initialized nor parsed, even though command-line works. diff --git a/libavcodec/exr.c b/libavcodec/exr.c index

Re: [Libav-user] EXR channel support?

On 15/02/14 18:09, Paul B Mahol wrote: On 2/15/14, Gonzalo Garramuno ggarr...@gmail.com wrote: On 15/02/14 04:56, Paul B Mahol wrote: Also the layer option is not used at all Here's a patch with layer being printed that segfaults. It seems the field is never initialized nor parsed, even

Re: [Libav-user] EXR channel support?

Here's the final patch that works out the layers for exr. This patch works fine if run under valgrind but segfaults otherwise if run normally. The problem appears to be the parsing of options (and thus in my options definition I guess). Commenting out: priv_class = exr_class, makes it work

Re: [Libav-user] EXR channel support?

On 15/02/14 20:02, Paul B Mahol wrote: I'm not clear enough: AVClass is missing in EXRContext struct. Thanks for the explanation. Now it all works fine. What's the proper way to submit a patch to get it added; this being my first contribution to ffmpeg. Should I send it here or at

[Libav-user] EXR channel support?

I was wondering if ffmpeg ( thru the exr reader ) has a way to specify channels different than the standard rgba channels. If it can, can someone provide an example of the command-line. ___ Libav-user mailing list Libav-user@ffmpeg.org

Re: [Libav-user] EXR channel support?

On 14/02/14 14:48, Paul B Mahol wrote: No, it can not. Thanks. Looking at the exr code it seems it would be easy to modify it to support other channels. However I am unfamiliar how to pass options down from ffmpeg_opt.c to the libavcodec/exr.c file. Maybe someone can point to a good

Re: [Libav-user] EXR channel support?

On 14/02/14 19:17, Paul B Mahol wrote: See for example libx264 encoder, by using AVOption ... Okay, I tinkered a bit but I cannot get the option to work. Here's my patch against latest head. diff --git a/libavcodec/exr.c b/libavcodec/exr.c index f231b70..93a0622 100644 --- a/libavcodec/exr.c

Re: [Libav-user] Sound disappears after seek

On 09/02/14 03:52, Carl Eugen Hoyos wrote: Gonzalo Garramuno ggarra13@... writes: Duplicate of ticket #3662, thank you for the sample! http://thread.gmane.org/gmane.comp.video.ffmpeg.trac/20273 Is it a duplicate? What did your regression tests show? Did you test the sample from that ticket

Re: [Libav-user] Sound disappears after seek

On 09/02/14 13:47, Carl Eugen Hoyos wrote: Gonzalo Garramuno ggarra13@... writes: On 09/02/14 03:52, Carl Eugen Hoyos wrote: What did your regression tests show? Did you test the sample from that ticket? Please do so if you believe my findings are wrong. I tried the sample from #3362

Re: [Libav-user] Sound disappears after seek

On 09/02/14 15:39, Carl Eugen Hoyos wrote: Both samples fail horribly if you try to seek backwards. Carl Eugen Okay. Thanks for all the help, Carl! Any possible ETA on when there might be a fix for it? ___ Libav-user mailing list

[Libav-user] Sound disappears after seek

I have an mp4 clip that has sound and it disappears on seek. That is, even in ffplay, a seek causes audio to go mute. I've uploaded the file at: http://www.datafilehost.com/d/885d526c ___ Libav-user mailing list Libav-user@ffmpeg.org

Re: [Libav-user] Sound disappears after seek

On 08/02/14 20:08, Gonzalo Garramuno wrote: I have an mp4 clip that has sound and it disappears on seek. That is, even in ffplay, a seek causes audio to go mute. I've uploaded the file at: http://www.datafilehost.com/d/885d526c More info. The sound disapppears in a seek after the clip

Re: [Libav-user] Sound disappears after seek

On 08/02/14 20:31, Carl Eugen Hoyos wrote: Gonzalo Garramuno ggarra13@... writes: I have an mp4 clip that has sound and it disappears on seek. That is, even in ffplay, a seek causes audio to go mute. Duplicate of ticket #3662, thank you for the sample! http://thread.gmane.org

Re: [Libav-user] Why we Shell32 library in pkg-config of libavfilter

On 23/01/14 08:04, anshul wrote: Hi Shell32 is an qt library, I would like to know what part of ffmpeg is using shell32 library No, it isn't. Shell32 is a windows library. Probably cygwin uses it. Use mingw to remove those dependencies. ___

Re: [Libav-user] PNG in mp3's failing

On 24/12/13 02:53, Carl Eugen Hoyos wrote: Should be fixed, thank you for the sample! Merry Christmas, Carl Eugen I can verify the problem is solved. Thanks for the rapid response. Merry Christmas to you and your family. ___ Libav-user mailing

Re: [Libav-user] PNG in mp3's failing

On 22/12/13 20:49, Carl Eugen Hoyos wrote: Does iTunes (and WMP) really show the image? Thank you, Carl Eugen I cannot speak for iTunes, but vlc shows it properly. ___ Libav-user mailing list Libav-user@ffmpeg.org

[Libav-user] PNG in mp3's failing

Here's the log of some mp3's with embedded PNG files that are failing to display. I can upload the mp3 if someone points me where to ftp it to. ffplay version N-58229-g459c7cb Copyright (c) 2003-2013 the FFmpeg developers built on Nov 17 2013 11:30:41 with gcc 4.6 (Ubuntu/Linaro

Re: [Libav-user] PNG in mp3's failing

On 22/12/13 17:57, Carl Eugen Hoyos wrote: Gonzalo Garramuno ggarra13@... writes: I can upload the mp3 if someone points me where to ftp it to. Either use http://www.datafilehost.com/ or read http://ffmpeg.org/bugreports.html (there is no hard filesize limit). I've uploaded into: http

[Libav-user] probing a file with ffmpeg libraries

I would like to probe a file to see if my player can play it (it is a valid mov, rm, wmv, avi, etc), but I don't know how to do it with the ffmpeg libraries. I don't care if ffmpeg knows the codec at that point. ___ Libav-user mailing list

Re: [Libav-user] Encoding AC3

On 03/08/13 00:14, Anshul maheshwari wrote: Mai On Aug 3, 2013 2:56 AM, Gonzalo Garramuno ggarr...@gmail.com mailto:ggarr...@gmail.com wrote: I copied the latest docs/example muxing.c and decoding_enconding.c and modified it to my needs. I am able to save a movie with synced sound if I

[Libav-user] Encoding AC3

I copied the latest docs/example muxing.c and decoding_enconding.c and modified it to my needs. I am able to save a movie with synced sound if I use audio codec pcm_s16le and convert the float values into s16 values using swresample. However, when I want to save ac3 to keep the data in float

Re: [Libav-user] sample_fmt_entry

On 27/07/13 13:35, Liang Zhang wrote: Hello, I tested the example program of demuxing for decoding audio signals and have received the information regarding unsupported audio format for ftlp when the input data has the extension of mp4. I checked the program and found that the example

[Libav-user] AC3 encoding not in sync with video, PCM_16LE works okay

I have coded an encoder in my viewer that writes out new movie files. My problem is trying to use AC3 as the audio codec. When I use it, the files created are out of sync (audio plays much faster). When I write out the movie using the PCM_16LE codec, all is fine (but of course, I don't have a

[Libav-user] Clarification on error message

I have an application that creates a movie file with sound. However, when the video is played in my application I get a bunch of errors like: [ffmpeg] freeing incomplete packet size 3224, new 9738 and the audio is wrong. I am wondering what does the above error mean.

Re: [Libav-user] Slightly OT: playing DVDs

On 02/07/13 08:49, Carl Eugen Hoyos wrote: There is a patch that you could work on: http://thread.gmane.org/gmane.comp.video.ffmpeg.devel/93750 Carl Eugen Carl, that set of patches is 3 years old and does not compile due to deprecation of URLContext.

Re: [Libav-user] Slightly OT: playing DVDs

On 03/07/13 14:07, Stefano Sabatini wrote: No if you see my more updated patches. That said, the code is still far from being production-ready, so it may require a significant effort and a good understanding of involved libraries/standards. ___

[Libav-user] Slightly OT: playing DVDs

I've gotten to the point in my player in that I want to add support to play DVDs. However, I don't know where to begin. ffplay plays /dev/sr0 (scene menu) and VOBs, but more is needed. I was hoping I could borrow a couple of calls from dvdread and be on my way. However, dvdread seems to return

Re: [Libav-user] Audio 5.1 downsample to stereo broken in swresample?

On 17/06/13 04:47, Nicolas George wrote: Can you reproduce the problem using the ffmpeg command-line tools? I just tried and the conversion works as expected. How do I force ffmpeg to use s16 output? ___ Libav-user mailing list

Re: [Libav-user] Audio 5.1 downsample to stereo broken in swresample?

On 17/06/13 04:47, Nicolas George wrote: Can you reproduce the problem using the ffmpeg command-line tools? I just tried and the conversion works as expected. I find ffmpeg does not rely on swresample for the conversion (at least there's no swr_init in the code). ffplay does use swresample,

[Libav-user] Reverse playback

I am wondering what is the best method to use in reverse playback. Currently I seek to some frame and decode all images/sounds that are smaller than that frame (keeping a cache of frames). This works rather well for most movies, except with the internal cached buffers of ffmpeg. I've tried

Re: [Libav-user] Reverse playback

On 13/06/13 17:26, Gonzalo Garramuno wrote: I am wondering what is the best method to use in reverse playback. Currently I seek to some frame and decode all images/sounds that are smaller than that frame (keeping a cache of frames). This works rather well for most movies, except

[Libav-user] Dolby 5.1 vs Dolby 5.1 (side)

I am wondering what's the difference between the two formats (Dolby 5.1) vs (Dolby 5.1 (side)). ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user

Re: [Libav-user] Missing a channel in Dolby 5:1

On 29/05/13 12:57, Carl Eugen Hoyos wrote: I did not look at your code, but did you already test the following? $ ffmpeg -i input51 out.wav If out.wav shows your problem, please report how to reproduce the bug. I digged into what's happening. LibSDLaudio does some swizzling of channels to

[Libav-user] Missing a channel in Dolby 5:1

I am using ffmpeg and libswresample to play back movie trailers. For stereo playback everything is good, but for Dolby 5.1, I get correct playback of all ambient noises but the audio track for voices is missing or too low of a sound, like a missing channel. My only weird implementation if

Re: [Libav-user] Missing a channel in Dolby 5:1

On 29/05/13 12:57, Carl Eugen Hoyos wrote: I did not look at your code, but did you already test the following? $ ffmpeg -i input51 out.wav If out.wav shows your problem, please report how to reproduce the bug. Carl Eugen Thanks, Carl. I already tested the problem with ffmpeg and ffplay. Both

Re: [Libav-user] MSVC 2010 pre-built binaries

On 21/05/13 02:29, Stéphane wrote: Hi Gonzalo, I use the binaries from Zeranoe (64 bits dll) without problem. What I just did, was to build my own lib files using lib.exe from MS SDK tools. First, I modified the def files from Zeranoe by adding LIBRARY ... statement at the begining of the

[Libav-user] ctx-request_sample_fmt

I saw this codeccontext variable ctx-request_sample_fmt and I want to set it to AV_SAMPLE_FMT_S16. I did so, but I get FLTP samples in return. Is this supposed to work at all? ___ Libav-user mailing list Libav-user@ffmpeg.org

Re: [Libav-user] AVCodecTag tag

On 29/04/13 10:19, Steffen wrote: I want to provide a list of codesc that is supported by a file format. I try to iterate over the codec_tag element in avoutputformat . But this is impossible because it's private. What can I do? -- View this message in context:

Re: [Libav-user] avcodec_decode_audio4() help

On 05/05/13 21:40, Gonzalo Garramuno wrote: On 03/05/13 01:30, Kalileo wrote: If you decode aac, then you might get hit by the change to planar format, which happened November 16, 2012 in the ffmpeg sources (although the effect is usually not a 'frying pan noise

Re: [Libav-user] avcodec_decode_audio4() help

On 06/05/13 11:51, Gonzalo Garramuno wrote: On 05/05/13 21:40, Gonzalo Garramuno wrote: On 03/05/13 01:30, Kalileo wrote: If you decode aac, then you might get hit by the change to planar format, which happened November 16, 2012 in the ffmpeg sources (although the effect is usually

Re: [Libav-user] avcodec_decode_audio4() help

I placed a print statement with: const char *av_get_sample_fmt_name(enum AVSampleFormat sample_fmt); and the return value for 1.0.6 is s16, while for 1.1.4 is fltp, which I assume is float planar. Does this mean I need to use the swresample library to resample the sound to s16 which the

[Libav-user] Regression problems with avcodec_decode_audio3

The call avcodec_decode_audio3 is deprecated. However it remains functional. After the change in code in ffmpeg, avcodec_decode_audio3 fails returning valid audio and returns a 'frying pan' noise. avcodec_decode_audio3 should be updated so that it works once again transparently. This would

Re: [Libav-user] avcodec_decode_audio4() help

On 03/05/13 01:30, Kalileo wrote: If you decode aac, then you might get hit by the change to planar format, which happened November 16, 2012 in the ffmpeg sources (although the effect is usually not a 'frying pan noise'). _ The problem also shows with wmav2.

[Libav-user] avcodec_decode_audio4() help

I have a problem with the latest releases of ffmpeg. I was using code that mimicked the code in avcodec_decode_audio3 calling avcodec_decode_audio4. However, when I use that code now I get a frying pan noise when playing the audio in my viewer. I reverted to avcodec_decode_audio3 again and

[Libav-user] git head compiling problems

make: *** No rule to make target `libavcodec/x86/dsputil_rnd_template.c', needed by `libavcodec/x86/dsputil_mmx.o' After I manually added the file, the compilation later failed with: make: *** No rule to make target `doc/all-components.texi', needed by `doc/ffmpeg.pod'. Stop.

[Libav-user] pkt.dts/pts clarification

I am looking for the final word on pkt.pts/dts for movies that are not streaming and how to hold a valid packet queue. int got_pict = 0; while( pkt.size 0 ) { int err = avcodec_decode_video2( stream-codec, av_frame, got_pict, pkt ); if ( err 0 ) {

[Libav-user] pkt.dts/pts clarification

I am looking for the final word on pkt.pts/dts for movies that are not streaming and how to hold a valid packet queue. int got_pict = 0; while( pkt.size 0 ) { int err = avcodec_decode_video2( stream-codec, av_frame, got_pict, pkt ); if ( err 0 ) {

[Libav-user] Cached frames and viewer

I looked at the latest ffmpeg and the demuxing example has a section for cached frames, which get decoded with an empty pkt. I was wondering how ffplay does without this or how a player is supposed to be coded to support these cached frames. ___

[Libav-user] AVI and MOV playback wrong but WMV right

I have written an open source viewer (mrViewer under sourceforge) that works with frames. All is fine except playback of AVI and MOV files. WMV movies play just fine. With avis or mov formats seeking to the beginning of the movie will offset all frames by two frames and will not allow to

[Libav-user] Wrong playback of frames at start

In my viewer, I have a problem playing avi and mov files in that the second and third frame are not displayed and the second frame becomes the fourth continuing until end. The problem, however, does not show with wmv files. I'm guessing I have a pts/dts problem in my viewer but for the life of

[Libav-user] WMV saving with av_guess_format

I have a routine that saves a movie from sequential frames. However, when the filename is a .wmv file, av_guess_format seems to return a corrupt context. The result of saving is a movie file with just 3 frames. I also tried muxing.c from head but it did not compile. After a change in defines I

Re: [Libav-user] asf (.wmv) muxer problem : duration is not good !

On 28/09/12 09:01, Stephane Debusne wrote: Hi all, i'm developing a graphical application using libav libraries. The application typically takes one MJPEG avi file and a wav file as input and output a muxed video file. I Know that ffmpeg.exe does it well but i have to do it inside my

[Libav-user] muxing starts at frame 3

I am trying the muxing example from docs/examples in recent git and I get two problems: With audio on, audio responds: [NULL @ 0x1e4eee0] Codec is experimental but experimental codecs are not enabled, try -strict -2 could not open codec The second issue is that when I comment the audio and leave

Re: [Libav-user] muxing.c with RGBA

2012/9/7 Arash Cordi arash.co...@gmail.com most video formats only support yuv. there's nothing you can do about it. why would you want to do that anyway? I have my movie data in RGBA and would like to avoid translation to encode faster and to keep the data the same.

[Libav-user] Encoding a movie file in rgba

I am trying to encode a movie file (avi or quicktime) as rgba. But I lack source code with examples, except ffmpeg which is too complex. Can anyone help me? Thanks in advance. -- Gonzalo Garramuño ggarr...@gmail.com ___ Libav-user mailing list

[Libav-user] Simple example of recording a video file in rgba space

TItle says it all. I'm looking for a tutorial or for code that shows how to encode a movie or avi file with rgba as the color space. -- Gonzalo Garramuño ggarr...@gmail.com ___ Libav-user mailing list Libav-user@ffmpeg.org

[Libav-user] DVD Vob subtitles missing

I have some VOBs which show with no subtitles when in fact they have them. The problem shows up in ffplay and my viewer, but not in VLC (which adds the titles after the movie is running). Is anyone aware of this problem? Sometimes the first VOB will not show subtitles, but the second VOB in

[Libav-user] mrViewer: Flipbook and video player

I've created and released a video and flipbook player that relies on ffmpeg. This was my first attempt at video work, so it is rather crude imho. The program can be downloaded from sourceforge.net at: http://sourceforge.net/projects/mrviewer/files/ Source code is in git at: git clone

[Libav-user] DVD playback (VOBs)

I am using ffmpeg in an application and some DVDs refuse to play back their VOBs. This happens only with some DVDs and those that happen play perfectly in Windows with Media Player. I also tried with VLC and Dragon Player and both also fail in the playback. Is there anything I can try or do to

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