Re: [FFmpeg-user] how to use svt-hevc in x265
> > I build ffmpeg with x265 and svt-hevc. I can do transcoding via > > ffmpeg command. But how to use svt-hevc in x265 via ffmpeg > > command? > > I don't understand what you mean by "use svt-hevc in x265". svt-hevc > is an HEVC/H.265 encoder. (lib)x265 is an HEVC/H.265 encoder. You > would use either one or the other. I thought so too, but apparently there is some integration: http://www.x265.org/x265-svt-hevc-house/?ModPagespeed=noscript https://x265.readthedocs.io/en/default/svthevc.html I do not see any point in ffmpeg supporting execution of svt-hevc through x256. It supports both encoders on its own. Regards, Frank ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Video scaling, padding and cropping together question
> The thing I am trying to achieve is a compromise between these two > extremes, eg. a method which gives less cropping at the LH & RH > picture edges for the price of a little padding above and below the > picture. I'm presuming this (ideally) involves scaling, padding and > cropping together in a single filter. Just pick a bigger width for the scale and pad filter, and then add crop as the last filter, cropping to the final resolution. Add crop with another comma to the filter chain as you did with scale and pad. Also, have a look at the filter documentation: http://ffmpeg.org/ffmpeg-filters.html ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] html5 Canvas to ffmpeg
> I am making animations in html5 canvas. I am able to get frames from > canvas using requestAnimationFrame() and convert them to png dataurl. > I want to send these frames to an ffmpeg running on localhost for > live encoding (I want to send the encoded video to rtmp server > afterward). > > Does anyone have an experience here? What is the recommended setup > here? Does it even make sense to use ffmpeg here? Browsers nowadays have a builtin video encoder for WebRTC [1]. Consider using this instead of ffmpeg + rtmp. [1] https://developer.mozilla.org/en-US/docs/Web/API/WebRTC_API ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Seeking for a method to remove sections of a video
> Hi, > > I'm new to this list. > > I'm seeking for a tool to remove the start and end sections of a movie > recorded from TV, plus sections on the middle (commercials), in > Linux. I have tried several GUI tools and they are either too complex > or lack some crucial feature (like handling two language audio > tracks). Some tools are obsolete and abandoned, do not work > (gopchop...). > > I have found that ffmpeg can do the perfect conversion and cutting. > > My problem is finding out the cut points. > > Thus what I seek is a GUI Wrapper for ffmpeg that allows me to move > around the movie selecting start, end, and middle remove sections, and > just generate a script for ffmpeg that I can then edit and adjust with > my own options and run. > > I have tried, for instance, ffmpegyag. Well, it is incapable of > visualizing my videos, so I can't select the cut points... > > > The closest I have is finding the points with Xine, then manually > concot the command line to generate sections, then concatenate using > method in https://trac.ffmpeg.org/wiki/Concatenate > > I seek a GUI to automate generating the cut points in a list or > script. > > Thanks :-) > In the past I used avidemux for simple cutting jobs: http://fixounet.free.fr/avidemux/ Not sure if it can handle multiple audio tracks. This is a full GUI application, not a ffmpeg frontend that you want. Just mentioning it... ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Using the flags -movflags +faststart
> > The '+' sign in front of the flags is not going to work? I disagree. > > ffmpeg's command line parser doesn't care whether the first flag is > > prepended with a '+' or not: > > Actually, I found this comment > (http://stackoverflow.com/questions/23419351/ffmpeg-using-movflags-faststart#comment60936769_23440682): > > The + sign indicates that ffmpeg should set the specified value in > addition to any values that the MOV/MP4 muxer will automatically set > during the course of executing the command. Omitting it means ffmpeg > will reset the flags to their default values, and only toggle the > state of faststart. Most MP4s generation doesn't involve the other > flags so usually it doesn't make a difference. > > I couldn't find this in ffmpeg's source or docs though. Mhmm, maybe not anymore. I think I read about it some years ago in the docs or wiki. In some of the examples it's still in, but no explanation. https://ffmpeg.org/ffmpeg-formats.html#Examples-9 ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] stabilisation
> when using -vf "deshake" a black frame is coming separating the > original frame from the "interpolated" pixels along the boders. > More like a line than a frame actually ! > Is there a way I can turn off these black lines ? As far as i know you have to "zoom in" to get rid of the artifacts at the borders, as Bouke already mentioned. The filter documentation[1] actually mentions an option "edge" which sounds like what you want to change. Try different values for that. Maybe "original" is what you're looking for. As an alternative to the deshake filter you can use vid.stab[2][3] which is intregated with two filters in ffmpeg (if compiled in the right way). It only supports 2-pass-encoding in ffmpeg. You also get some "wobble" artifacts at the border, but it isn't that bad most often. You might still want to crop a bit at the edges. [1] http://ffmpeg.org/ffmpeg-filters.html#deshake [2] https://github.com/georgmartius/vid.stab [3] http://public.hronopik.de/vid.stab/ Regards, Frank ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Build error with libmp3lame and libshine.
> The error message says... > > /home/user/build/lib/libmp3lame.a(takehiro.o):(.rodata+0x0): multiple > definition of > `slen2_tab' /home/user/build/lib/libshine.a(tables.o):(.rodata+0xc80): > first defined > here /home/user/build/lib/libmp3lame.a(takehiro.o):(.rodata+0x40): > multiple definition of > `slen1_tab' /home/user/build/lib/libshine.a(tables.o):(.rodata+0xcc0): > first defined here collect2: ld returned 1 exit status make: *** > [ffmpeg_g] Error 1 These are symbol collisions between both libraries which basically means you can't use both at the same time (with static linking). prefixes (or namespaces in c++) are there for a good reason... Build shared libs and link dynamically! As these functions are not part of the API, this should work. ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user
Re: [FFmpeg-user] ffmpeg serving to Avisynth
> > What processing do you want to do with ffmpeg? > > At a minimum I foresee concatenating input files with it. My current > project has 350+ video files. Avisynth cannot work with more than 25 > - 35 without crashing. I have not found an Avisynth mechanism for > concatenating files that preserves audio. There are multiple ways to concatenate files depending on the input codecs and what other processing you want to do with it [4]. Not sure if it handles hundreds of input files well enough. > > And why do you want to > > send it over tcp, if that's what TCPSource reads (not an avisynth > > user)? > > To avoid intermediate storage. Workspace for this project is 2TB. > Each additional version of the project is currently ~700GB. Some form > of inter-process communication is required to avoid intermediate > storage. TCPSource() seems the only type of built-in IPC input > Avisynth supports. I don't know which data layout they expect in TCPSource and if it is in any way compatible with the tcp output protocol in ffmpeg, or any other protocol. I know this was your question in the first place but i can't help you there. You could play around and just try to connect [1][2]. There's also some avisynth support in ffmpeg [3]. As i never used it i don't know about its capabilities. What are you doing after processing with avisynth? Do you pipe it back into ffmpeg for encoding? Can't you use built-in filters [5] instead of an avisynth script? [1] http://avisynth.nl/index.php/TCPServer [2] http://ffmpeg.org/ffmpeg-protocols.html#tcp [3] http://www.ffmpeg.org/faq.html#How-can-I-read-DirectShow-files_003f [4] http://trac.ffmpeg.org/wiki/Concatenate [5] http://ffmpeg.org/ffmpeg-filters.html#Description ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user
Re: [FFmpeg-user] ffmpeg serving to Avisynth
> I hope to reach an expert familiar with both ffmpeg and Avisynth! Im > looking to perform some processing in ffmpeg, and then to continue in > Avisynth. For a number of reasons, including disk space, Id like to > avoid intermediate files. Which, if any, of the ffmpeg server > protocols are compatible with Avisynths TCPSource() filter, i.e. What processing do you want to do with ffmpeg? And why do you want to send it over tcp, if that's what TCPSource reads (not an avisynth user)? If it's just decoding then have a look at ffms2 [1]. It has an avisynth plugin. [1] https://github.com/FFMS/ffms2 ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user
Re: [FFmpeg-user] Inserting Seekable Offsets in m4a Audio File
Does seeking in the original file works with ffplay? I cannot answer your question because I do not know how to try seeking from a console. (I don't understand what you are saying here.) Did you try playing your input file with ffplay? Does it play? Did you try to seek? Did you try to wildly click into the window that opened? (Did a window open?) Did you try to press all buttons on your keyboard that might make sense when trying to seek? Before trying more than 100 keys, just have a look here: https://www.ffmpeg.org/ffplay.html#While-playing ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user
Re: [FFmpeg-user] how to make moov box before mdat box in mp4 file
Hi, I used the command of 'ffmpeg -i ./file1.mp4 ./file2.mp4' to trancode. But I found moov box is behind mdat box in file2.mp4. How to how to make moov box before mdat box in mp4 file? See format documentation: https://ffmpeg.org/ffmpeg-formats.html#mov_002c-mp4_002c-ismv Either run qt-faststart after encoding or do it directly by adding the following to the ffmpeg command (in front of the output file): -movflags +faststart Regards, Frank ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user
Re: [FFmpeg-user] how to use alpha channel to make transparent effect
I use the below command to place one image on one video:ffmpeg -i ./file1.mp4 -i ./file2.jpg -filter_complex overlay ./file3.mp4 But there is no transparent effect in resulting file, i.e. file3.mp4. What is the command to use alpha channel to make transparent effect? Have a look at the blend filter and its opacity and expression options: http://ffmpeg.org/ffmpeg-filters.html#blend_002c-tblend Regards, Frank ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user
Re: [FFmpeg-user] how to use alpha channel to make transparent effect
I use the below command to place one image on one video:ffmpeg -i ./file1.mp4 -i ./file2.jpg -filter_complex overlay ./file3.mp4 But there is no transparent effect in resulting file, i.e. file3.mp4. What is the command to use alpha channel to make transparent effect? Have a look at the blend filter and its opacity and expression options: http://ffmpeg.org/ffmpeg-filters.html#blend_002c-tblend IMHO OP actually wants overlay filter. When he uses an image format with alpha support like png instead of jpeg, then yes. Just look at the second example here: http://ffmpeg.org/ffmpeg-filters.html#Examples-55 ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user
Re: [FFmpeg-user] Question about ffmpeg
I am stil looking around for other solutions, but the idea is to combine 30 images of 500x500 to a combined total image of 2500x3000 pixels. The reason I would like to use ffmpeg for is the batchfile automation. The smaller images change content so the new total map needs to be updated when that happens. Stitching these images everytime in photoshop can be time consuming. While ffmpeg could do it in 5 seconds. I'll try to use the advice I have read sofar. Hi, i think, imagemagick is better suited for the job when it comes to still images. See: http://www.imagemagick.org/Usage/montage/#geometry_size Greetings, Frank. ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user
Re: [FFmpeg-user] How to scale watermark proportionally to width and height of video frame?
How to scale watermark proportionally video frame size (to width and to height of video frame)? Now I use the following command: ffmpeg -i input.mkv -i logo.png -filter_complex [1:v]scale=w=iw/3:h=ih/3[watermark_scaled];[0:v][watermark_scaled]overlay=x=main_w-overlay_w-main_w/20:y=main_h-overlay_h-main_w/20 output.mkv I use scale=w=iw/3:h=ih/3, but I can't use main_w and main_h variables in this place. E.g. scale=w=main_w*0.05:main_h*0.05 don't work. How to get video frame width and height to use them for scaling watermark? Hello, as far as i know, it is not possible. You have to get the video dimension on an outer layer, like a shell script, and pass it to the scale filter. All filters only know about their inputs, not about other filter chains. Something like: streaminfo=`mktemp` ffprobe -v quiet -show_streams -select_streams v:0 input.mkv $streaminfo width=`grep width $streaminfo | cut -d'=' -f2` height=`grep height $streaminfo | cut -d'=' -f2` ffmpeg -i input.mkv -i logo.png -filter_complex [1:v]scale=w=$width/3:h=$height/3[watermark_scaled];[0:v][watermark_scaled]overlay=x=main_w-overlay_w-main_w/20:y=main_h-overlay_h-main_w/20 output.mkv rm $streaminfo Greetings, Frank. ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user
