September 2017 - FFmpeg-trac - lists.ffmpeg.org

#6639(avdevice:new): video4linux2 (v4l2) add option to set bitrate for compressed video
by FFmpeg 06 Sep '17

06 Sep '17

#6639: video4linux2 (v4l2) add option to set bitrate for compressed video -------------------------------------+------------------------------------- Reporter: moritzmhmk | Type: Status: new | enhancement Component: avdevice | Priority: normal Keywords: v4l2 | Version: bitrate video4linux2 | unspecified Blocking: | Blocked By: Analyzed by developer: 0 | Reproduced by developer: 0 -------------------------------------+------------------------------------- While input_format can be set to h264 there is no way to set the bitrate for a webcam. The bitrate for the camera in question can be set with "v4l2-ctl --set- ctrl video_bitrate=300000" How to reproduce: {{{ % ffmpeg -f video4linux2 -input_format h264 -video_size 1280x704 -i /dev/video0 ... ffmpeg version 3.2.5-1 built with gcc 6.3.0 (Raspbian 6.3.0-18+rpi1) 20170516 }}} -- Ticket URL: <https://trac.ffmpeg.org/ticket/6639> FFmpeg <https://ffmpeg.org> FFmpeg issue tracker

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Re: [FFmpeg-trac] #3123(avformat:new): Request: Support MKV files with ordered chapters
by FFmpeg 05 Sep '17

05 Sep '17

#3123: Request: Support MKV files with ordered chapters -------------------------------------+------------------------------------ Reporter: 11rcombs | Owner: Type: enhancement | Status: new Priority: wish | Component: avformat Version: git-master | Resolution: Keywords: mkv | Blocked By: Blocking: | Reproduced by developer: 0 Analyzed by developer: 0 | -------------------------------------+------------------------------------ Comment (by dericed): @vertigo, this is ugly, but here's my workaround for now https://github.com/mediamicroservices/mm/blob/996b5902e9987e97265190b274175…. This uses mkvextract to get the chapters as xml, xmlstarlet to pick out the right ordered edition, and the creates a ffconcat input based on the edition chapters' in and out points. -- Ticket URL: <https://trac.ffmpeg.org/ticket/3123#comment:5> FFmpeg <https://ffmpeg.org> FFmpeg issue tracker

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#6625(undetermined:new): "Freezes" transcoding RTP g.711 stream to mp3
by FFmpeg 05 Sep '17

05 Sep '17

#6625: "Freezes" transcoding RTP g.711 stream to mp3 -------------------------------------+------------------------------------- Reporter: sagonzal | Type: defect Status: new | Priority: normal Component: | Version: undetermined | unspecified Keywords: rtp g.711 | Blocked By: Blocking: | Reproduced by developer: 0 Analyzed by developer: 0 | -------------------------------------+------------------------------------- Hi, I am trying to connect to a live RTP stream of g.711 audio from an intercom and then output it as an mp3 file. '''FFmpeg version''' N-86996-g931c0ac95c-Reino cross-compiled for Windows 64 w/ pthreads and debug=3 enabled '''command:''' ffmpeg -re -f mulaw -i rtp://10.200.1.14:32760 -sample_rate 44100 -filter:a "asetrate=9000" -acodec libmp3lame -ar 44100 live- rtp-g711-toMP3.mp3 -report '''output:''' “live-rtp-g711-toMP3.mp3” '''report:''' “live-rtp-g711-toMP3-REPORT.log” '''gdb backtrace:''' “live-rtp-g711-toMP3-BACKTRACE.txt” With this command, the window “freezes” after printing “''[udp @ 0000002c748241e0] end receive buffer size reported is 65536''”. The command line will stay that way indefinitely until I enter ''ctrl+c'' (''q'' doesn’t work), after which it seems to say that nothing was written to the output, and the output file produced is indeed empty/unplayable. Unfortunately I cannot provide access to th live rtp stream, as it requires VPN access. I saw something about using ffplay if my output isn’t reproducable, but I’m not sure how to do that. If it’s needed could you please give more details on how to do this? However I can say that, using Wireshark, I have confirmed that there is traffic coming through port 32760 — packets using the RTP protocol and g.711U payload type, as expected (''attached screenshot “wireshark- RTP-g711-traffic.png”''). I Analyzed and Saved the data from Wireshark as a "synchronized forward stream audio” in the .raw format, then used the same command with the .raw input instead of an RTP stream, and that works: '''command:''' ffmpeg -re -f mulaw -i wireshark-rtp-g711-syncedRAW.raw -sample_rate 44100 -filter:a "asetrate=9000" -acodec libmp3lame -ar 44100 wireshark-rtp-g711 -syncedRAW-toMP3.mp3 -report '''input:''' “wireshark-rtp-g711-syncedRAW.raw” '''output:''' “wireshark-rtp-g711-syncedRAW-toMP3.mp3” '''report:''' “wireshark-rtp-g711-syncedRAW-toMP3-REPORT.log” I don’t know why the command works with the saved audio from Wireshark but not with a live stream. I’m very new to FFmpeg so I apologize if this is just a user error. I would appreciate any light that can shed on this problem! Thanks very much, Sara -- Ticket URL: <https://trac.ffmpeg.org/ticket/6625> FFmpeg <https://ffmpeg.org> FFmpeg issue tracker

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Re: [FFmpeg-trac] #3123(avformat:new): Request: Support MKV files with ordered chapters
by FFmpeg 04 Sep '17

04 Sep '17

#3123: Request: Support MKV files with ordered chapters -------------------------------------+------------------------------------ Reporter: 11rcombs | Owner: Type: enhancement | Status: new Priority: wish | Component: avformat Version: git-master | Resolution: Keywords: mkv | Blocked By: Blocking: | Reproduced by developer: 0 Analyzed by developer: 0 | -------------------------------------+------------------------------------ Comment (by vertigo): It looks like this is stalled, but I just wanted to provide a couple links to provide more input on the issue, in case it helps the ffmpeg devs to understand what the goal is, and to show there are actually quite a few people that are waiting on this. https://forum.kodi.tv/showthread.php?tid=55764 https://forum.kodi.tv/showthread.php?tid=214462x -- Ticket URL: <https://trac.ffmpeg.org/ticket/3123#comment:4> FFmpeg <https://ffmpeg.org> FFmpeg issue tracker

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#6636(undetermined:new): [v4l2] Support H264/5 Streams
by FFmpeg 04 Sep '17

04 Sep '17

#6636: [v4l2] Support H264/5 Streams -------------------------------------+------------------------------------- Reporter: sarnex | Type: Status: new | enhancement Component: | Priority: normal undetermined | Version: git- Keywords: v4l2 | master v4l2loopback | Blocked By: Blocking: | Reproduced by developer: 0 Analyzed by developer: 0 | -------------------------------------+------------------------------------- Hi, Currently, v4l2 format outputs only support rawvideo. Some outputs support h264, like v4l2loopback(see here https://github.com/umlaeute/v4l2loopback/blob/master/v4l2loopback_formats.h) You currently get this error if you try the following command ffmpeg -f x11grab -r 30 -s 2560x1440 -i :0.0+1920,0 -vcodec libx264 -f v4l2 -y /dev/video0 [v4l2 @ 0x94a6c0] V4L2 output device supports only a single raw video stream I would like the ability to output to v4l2 with h264/5 encoded video streams. I can test any patches. Thanks, Sarnex -- Ticket URL: <https://trac.ffmpeg.org/ticket/6636> FFmpeg <https://ffmpeg.org> FFmpeg issue tracker

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#6635(undetermined:new): Incorrect scanning type fo AVI container
by FFmpeg 03 Sep '17

03 Sep '17

#6635: Incorrect scanning type fo AVI container -------------------------------------+------------------------------------- Reporter: laurfb | Type: defect Status: new | Priority: normal Component: | Version: undetermined | unspecified Keywords: | Blocked By: Blocking: | Reproduced by developer: 0 Analyzed by developer: 0 | -------------------------------------+------------------------------------- Scanning type for AVI container is always set to "progressive" no matter of interlaced/interleaved type of video stream stored in. Example: ffmpeg -i input_files -c:v mpeg2video -flags +ilme+ildct -top 1 output.avi or ffmpeg -i input_files -c:v dvvideo -flags +ilme+ildct -top 1 output.avi or ffmpeg -i input_files -c:v mpeg1video -flags +ilme+ildct -top 1 output.avi or ffmpeg -i input_files -c:v mpeg4 -flags +ilme+ildct -top 1 output.avi Always the scan type for output.avi files is set to "Progressive" while the store metod is "Interleaved fields, Bottom Field First". No matter of input_files: dvvideo (interlaced, bottom filed first) interlaced mpeg2 or any other type. Related to ticket #6383 -- Ticket URL: <https://trac.ffmpeg.org/ticket/6635> FFmpeg <https://ffmpeg.org> FFmpeg issue tracker

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#6605(avfilter:new): Drawing subtitles on transparent video creates empty output
by FFmpeg 03 Sep '17

03 Sep '17

#6605: Drawing subtitles on transparent video creates empty output -----------------------------------+-------------------------------------- Reporter: slhck | Type: defect Status: new | Priority: normal Component: avfilter | Version: git-master Keywords: subtitles | Blocked By: Blocking: | Reproduced by developer: 0 Analyzed by developer: 0 | -----------------------------------+-------------------------------------- Trying to render subtitles on a transparent video background produces an empty, transparent PNG with no subtitles: {{{ $ cat subs.srt 1 00:00:00,000 --> 00:00:02,000 <i>Test</i> $ ffmpeg -f lavfi -i "color=color=white@0.0:size=100x100,format=rgba,subtitles=subs.srt" -frames:v 1 out.png ffmpeg version N-87010-g3c99523-tessus Copyright (c) 2000-2017 the FFmpeg developers built with Apple LLVM version 8.0.0 (clang-800.0.42.1) configuration: --cc=/usr/bin/clang --prefix=/opt/ffmpeg --extra- version=tessus --enable-avisynth --enable-fontconfig --enable-gpl --enable-libass --enable-libbluray --enable-libfreetype --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopus --enable-libsnappy --enable- libsoxr --enable-libspeex --enable-libtheora --enable-libvidstab --enable- libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzmq --enable-libzvbi --enable-version3 --disable-ffplay --disable-indev=qtkit libavutil 55. 74.100 / 55. 74.100 libavcodec 57.102.100 / 57.102.100 libavformat 57. 76.100 / 57. 76.100 libavdevice 57. 7.100 / 57. 7.100 libavfilter 6. 99.100 / 6. 99.100 libswscale 4. 7.102 / 4. 7.102 libswresample 2. 8.100 / 2. 8.100 libpostproc 54. 6.100 / 54. 6.100 [Parsed_subtitles_2 @ 0x7fd134d00740] Shaper: FriBidi 0.19.2 (SIMPLE) [Parsed_subtitles_2 @ 0x7fd134d00740] Using font provider coretext [Parsed_subtitles_2 @ 0x7fd134d00740] fontselect: (Arial, 400, 0) -> /Library/Fonts/Arial.ttf, -1, ArialMT [Parsed_subtitles_2 @ 0x7fd134d00740] fontselect: (Arial, 400, 100) -> /Library/Fonts/Arial Italic.ttf, -1, Arial-ItalicMT Input #0, lavfi, from 'color=color=white@0.0:size=100x100,format=rgba,subtitles=subs.srt': Duration: N/A, start: 0.000000, bitrate: N/A Stream #0:0: Video: rawvideo (RGBA / 0x41424752), rgba, 100x100 [SAR 1:1 DAR 1:1], 25 tbr, 25 tbn, 25 tbc File 'out.png' already exists. Overwrite ? [y/N] y Stream mapping: Stream #0:0 -> #0:0 (rawvideo (native) -> png (native)) Press [q] to stop, [?] for help Output #0, image2, to 'out.png': Metadata: encoder : Lavf57.76.100 Stream #0:0: Video: png, rgba, 100x100 [SAR 1:1 DAR 1:1], q=2-31, 200 kb/s, 25 fps, 25 tbn, 25 tbc Metadata: encoder : Lavc57.102.100 png frame= 1 fps=0.0 q=-0.0 Lsize=N/A time=00:00:00.04 bitrate=N/A speed=9.16x video:1kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown }}} When using `yuv420p` in the `color` filter, the output looks as expected (just with opaque background). This is somewhat related to #3302 -- Ticket URL: <https://trac.ffmpeg.org/ticket/6605> FFmpeg <https://ffmpeg.org> FFmpeg issue tracker

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