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• What ffmpeg settings to ensure 0 duplicate frames and 0 dropped frames when capturing to mpeg-2 program stream using ffmpeg/avfoundation on Mac ?

  16 février 2017, par aerodavo

  I’m trying to capture to a DVD compliant mpeg-2 file (ffmpeg : -target ntsc-dvd) from the HDMI output of a camcorder into a Magewell HDMI to USB 3.0 box into my Late 2012 15" non-retina MacBook Pro (quad core 2.3, 16gb ram, ssd), using ffmpeg/avfoundation.

  I’ve tried everything I can think of, or find online. I’m still getting duplicate and dropped frames, which either leads to audio/video sync issues, or audio dropouts, especially for longer recordings. I need this to be stable for recordings of up to 2.5 hours. This is the Terminal output for a 1.5 hour recording :

  Lapaki:~ Lapaki$ /Users/Lapaki/Desktop/ffmpeg -f avfoundation -video_size 960x540 -pixel_format uyvy422 -framerate ntsc -i "XI:XI" -vf crop=iw-240:ih:120:0 -target ntsc-dvd -aspect 4:3 -q:v 3 -ab 256k /Users/Lapaki/Desktop/FF\ Test/`date +%F`\ `date +%H_%M_%S`.mpg
  
  ffmpeg version 3.2.3-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-libschroedinger --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-version3 --disable-ffplay --disable-indev=qtkit --disable-indev=x11grab_xcb
  
    libavutil      55. 34.101 / 55. 34.101
  
    libavcodec     57. 64.101 / 57. 64.101
  
    libavformat    57. 56.101 / 57. 56.101
  
    libavdevice    57.  1.100 / 57.  1.100
  
    libavfilter     6. 65.100 /  6. 65.100
  
    libswscale      4.  2.100 /  4.  2.100
  
    libswresample   2.  3.100 /  2.  3.100
  
    libpostproc    54.  1.100 / 54.  1.100
  
  Input #0, avfoundation, from 'XI:XI':
  
    Duration: N/A, start: 610606.984208, bitrate: N/A
  
      Stream #0:0: Video: rawvideo (UYVY / 0x59565955), uyvy422, 960x540, 29.97 fps, 29.97 tbr, 1000k tbn, 1000k tbc
  
      Stream #0:1: Audio: pcm_f32le, 48000 Hz, stereo, flt, 3072 kb/s
  
  Output #0, dvd, to '/Users/Lapaki/Desktop/FF Test/2017-02-15 17_46_28.mpg':
  
    Metadata:
  
      encoder         : Lavf57.56.101
  
      Stream #0:0: Video: mpeg2video (Main), yuv420p, 720x480 [SAR 8:9 DAR 4:3], q=2-31, 6000 kb/s, 29.97 fps, 90k tbn, 29.97 tbc
  
      Metadata:
  
        encoder         : Lavc57.64.101 mpeg2video
  
      Side data:
  
        cpb: bitrate max/min/avg: 9000000/0/6000000 buffer size: 1835008 vbv_delay: -1
  
      Stream #0:1: Audio: ac3, 48000 Hz, stereo, fltp, 256 kb/s
  
      Metadata:
  
        encoder         : Lavc57.64.101 ac3
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (rawvideo (native) -> mpeg2video (native))
  
    Stream #0:1 -> #0:1 (pcm_f32le (native) -> ac3 (native))
  
  Press [q] to stop, [?] for help
  
  [swscaler @ 0x7fd315892800] Warning: data is not aligned! This can lead to a speedloss
  
  frame=   20 fps=0.0 q=3.0 size=     298kB time=00:00:00.65 bitrate=3721.4kbits/sframe=   35 fps= 35 q=3.0 size=     498kB time=00:00:01.13 bitrate=3591.2kbits/sframe=   50 fps= 33 q=3.0 size=     708kB time=00:00:01.64 bitrate=3519.4kbits/sframe=   65 fps= 32 q=3.0 size=     920kB time=00:00:02.16  
  
  ...
  
   bitrate=2721.7kbits/frame=162094 fps= 30 q=3.0 size= 1796936kB time=01:30:08.47 bitrate=2721.7kbits/frame=162109 fps= 30 q=3.0 size= 1797142kB time=01:30:08.98 bitrate=2721.8kbits/frame=162110 fps= 30 q=3.0 Lsize= 1797202kB time=01:30:09.01 bitrate=2721.9kbits/s dup=221 drop=0 speed=   1x    
  
  video:1579050kB audio:168069kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 2.866632%

  I deleted the middle part (denoted by the "..."), which is just a lot more of the same accumulating information. By the end there are 221 duplicate frames, and for this one I didn’t get any dropped frames, but that happens every other time as well it seems.

  With this code, the audio seems to stay in pretty good sync, but I get little dropouts every 30 seconds to a minute or so. On this recording, there are dropouts at :

  00:00:43, 00:01:19, 00:01:47, 00:02:17, 00:03:18, ...

  I stopped listening there ; they happen at the end too, so I assume similarly spaced dropouts are happening throughout the file.

  Is there some secret ffmpeg code to ensure there are no dropped or duplicate frames when capturing from a live source to dvd compliant mpeg-2 files ?

  When I convert from pretty much any type of file to mpeg-2 files using -target ntsc-dvd, the speed is something like 10x on this machine, so it seems like it would have no problem keeping up with a live source, right ?

  I’ve also tried constant bit rate using -b:v 5000k -minrate 5000k -maxrate 5000k -bufsize 2500k, which also doesn’t prevent dropped/duplicate frames.

  I’ve tried separating out the audio and video inputs, which doesn’t solve it.

  I’ve tried using -vsync 0 on the video input, which does seem to solve the issue, because the output doesn’t report dups/drops, but the audio/video drift out of sync more and more, so that hasn’t worked either.

  Thanks so much for any help. I’ve been testing and testing and searching and searching for weeks...

• Demultiplex UDP live stream to multiple single live stream outputs using FFMPEG & FFSERVE

  22 mars 2018, par tiras muturi

  i have a problem with ffmpeg. i have an input live stream that has 8 inputs and i want to use ffmpeg to convert it from udp live steram to tcp livestream and then extract each of the 8 input stream differently.

  i have been reading about the ffmpeg documentation at they havent provided a clear way of solving my problem.

  am running

  ffmpeg version 3.2.4-1~16.04.york0 Copyright (c) 2000-2017 the FFmpeg developers built with gcc 5.4.1 (Ubuntu 5.4.1-5ubuntu2~16.04.york1) 20170210 configuration: --prefix=/usr --extra-version='1~16.04.york0' --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libebur128 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared libavutil 55. 34.101 / 55. 34.101 libavcodec 57. 64.101 / 57. 64.101 libavformat 57. 56.101 / 57. 56.101 libavdevice 57. 1.100 / 57. 1.100 libavfilter 6. 65.100 / 6. 65.100 libavresample 3. 1. 0 / 3. 1. 0 libswscale 4. 2.100 / 4. 2.100 libswresample 2. 3.100 / 2. 3.100 libpostproc 54. 1.100 / 54. 1.100

  am running this command to help me split my input into multiple output that can be accessed differently.

  ffmpeg \
  
  -i udp://@localhost:4000 -loglevel debug \
  
  -map 0:0 http://localhost:8090/feed1.ffm \
  
  -map 0:1 http://localhost:8090/feed2.ffm \
  
  -map 0:2 http://localhost:8090/feed3.ffm \
  
  -map 0:3 http://localhost:8090/feed4.ffm \
  
  -map 0:4 http://localhost:8090/feed5.ffm \
  
  -map 0:5 http://localhost:8090/feed6.ffm \
  
  -map 0:6 http://localhost:8090/feed7.ffm \
  
  -map 0:7 http://localhost:8090/feed8.ffm

  this is my full output

  ubuntu@ip-172-31-40-57:~$ ffmpeg -i udp://@localhost:4000  -map 0:0  http://localhost:8090/feed1.ffm  -map 0:1 http://localhost:8090/feed2.ffm  -map 0:2 http://localhost:8090/feed3.ffm  -map 0:3 http://localhost:8090/feed4.ffm  -map 0:4 http://localhost:8090/feed5.ffm  -map 0:5 http://localhost:8090/feed6.ffm  -map 0:6 http://localhost:8090/feed7.ffm  -map 0:7 http://localhost:8090/feed8.ffm
  
  
  
  ffmpeg version 3.2.4-1~16.04.york0 Copyright (c) 2000-2017 the FFmpeg developers built with gcc 5.4.1 (Ubuntu 5.4.1-5ubuntu2~16.04.york1) 20170210 configuration: --prefix=/usr --extra-version='1~16.04.york0' --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libebur128 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared libavutil      55. 34.101 / 55. 34.101 libavcodec     57. 64.101 / 57. 64.101 libavformat    57. 56.101 / 57. 56.101 libavdevice    57.  1.100 / 57.  1.100 libavfilter     6. 65.100 /  6. 65.100 libavresample   3.  1.  0 /  3.  1.  0 libswscale      4.  2.100 /  4.  2.100 libswresample   2.  3.100 /  2.  3.100 libpostproc    54.  1.100 / 54.  1.100
  
  
  
  
  
  Input #0, mpegts, from 'udp://@localhost:4000':
  
   Duration: N/A, start: 14580.980000, bitrate: 768 kb/s
  
   Program 1
  
  Metadata:
  
    service_name    : STREAM1
  
    service_provider: RAL
  
  Stream #0:0[0x101]: Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz, stereo, s16p, 96 kb/s
  
  Program 2
  
  Metadata:
  
    service_name    : STREAM2
  
    service_provider: RAL
  
  Stream #0:1[0x111]: Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz, stereo, s16p, 96 kb/s
  
  Program 3
  
  Metadata:
  
    service_name    : STREAM3
  
    service_provider: RAL
  
  Stream #0:2[0x121]: Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz, stereo, s16p, 96 kb/s
  
    Program 4
  
    Metadata:
  
    service_name    : STREAM4
  
    service_provider: RAL
  
  Stream #0:3[0x131]: Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz, stereo, s16p, 96 kb/s
  
  Program 5
  
  Metadata:
  
    service_name    : STREAM5
  
    service_provider: RAL
  
  Stream #0:4[0x141]: Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz, stereo, s16p, 96 kb/s
  
  Program 6
  
  Metadata:
  
    service_name    : STREAM6
  
    service_provider: RAL
  
  Stream #0:5[0x151]: Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz, stereo, s16p, 96 kb/s
  
  Program 7
  
  Metadata:
  
    service_name    : STREAM7
  
    service_provider: RAL
  
  Stream #0:6[0x161]: Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz, stereo, s16p, 96 kb/s
  
  Program 8
  
  Metadata:
  
    service_name    : STREAM8
  
    service_provider: RAL
  
  Stream #0:7[0x171]: Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz, stereo, s16p, 96 kb/s
  
  Output #0, ffm, to 'http://localhost:8090/feed1.ffm':
  
  Metadata:
  
  creation_time   : now
  
  encoder         : Lavf57.56.101
  
  Stream #0:0: Audio: mp2, 44100 Hz, stereo, s16, 64 kb/s
  
  Metadata:
  
    encoder         : Lavc57.64.101 mp2
  
  Output #1, ffm, to 'http://localhost:8090/feed2.ffm':
  
  Metadata:
  
  creation_time   : now
  
  encoder         : Lavf57.56.101
  
  Stream #1:0: Audio: mp2, 44100 Hz, stereo, s16, 64 kb/s
  
  Metadata:
  
    encoder         : Lavc57.64.101 mp2
  
  Output #2, ffm, to 'http://localhost:8090/feed3.ffm':
  
  Metadata:
  
  creation_time   : now
  
  encoder         : Lavf57.56.101
  
  Stream #2:0: Audio: mp2, 44100 Hz, stereo, s16, 64 kb/s
  
  Metadata:
  
    encoder         : Lavc57.64.101 mp2
  
  Output #3, ffm, to 'http://localhost:8090/feed4.ffm':
  
  Metadata:
  
  creation_time   : now
  
  encoder         : Lavf57.56.101
  
  Stream #3:0: Audio: mp2, 44100 Hz, stereo, s16, 64 kb/s
  
  Metadata:
  
    encoder         : Lavc57.64.101 mp2
  
  Output #4, ffm, to 'http://localhost:8090/feed5.ffm':
  
  Metadata:
  
  creation_time   : now
  
  encoder         : Lavf57.56.101
  
  Stream #4:0: Audio: mp2, 44100 Hz, stereo, s16, 64 kb/s
  
  Metadata:
  
    encoder         : Lavc57.64.101 mp2
  
  Output #5, ffm, to 'http://localhost:8090/feed6.ffm':
  
  Metadata:
  
  creation_time   : now
  
  encoder         : Lavf57.56.101
  
  Stream #5:0: Audio: mp2, 44100 Hz, stereo, s16, 64 kb/s
  
  Metadata:
  
    encoder         : Lavc57.64.101 mp2
  
  Output #6, ffm, to 'http://localhost:8090/feed7.ffm':
  
  Metadata:
  
  creation_time   : now
  
  encoder         : Lavf57.56.101
  
  Stream #6:0: Audio: mp2, 44100 Hz, stereo, s16, 64 kb/s
  
  Metadata:
  
    encoder         : Lavc57.64.101 mp2
  
  Output #7, ffm, to 'http://localhost:8090/feed8.ffm':
  
  Metadata:
  
  creation_time   : now
  
  encoder         : Lavf57.56.101
  
  Stream #7:0: Audio: mp2, 44100 Hz, stereo, s16, 64 kb/s
  
  Metadata:
  
    encoder         : Lavc57.64.101 mp2
  
  Stream mapping:
  
  Stream #0:0 -> #0:0 (mp2 (native) -> mp2 (native))
  
  Stream #0:0 -> #1:0 (mp2 (native) -> mp2 (native))
  
  Stream #0:0 -> #2:0 (mp2 (native) -> mp2 (native))
  
  Stream #0:0 -> #3:0 (mp2 (native) -> mp2 (native))
  
  Stream #0:0 -> #4:0 (mp2 (native) -> mp2 (native))
  
  Stream #0:0 -> #5:0 (mp2 (native) -> mp2 (native))
  
  Stream #0:0 -> #6:0 (mp2 (native) -> mp2 (native))
  
  Stream #0:0 -> #7:0 (mp2 (native) -> mp2 (native))
  
  Press [q] to stop, [?] for help
  
  size=      72kB time=00:00:07.66 bitrate=  76.9kbits/s speed=2.68x
  
  video:0kB audio:480kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
  
  Exiting normally, received signal 2.

  these are my live feeds.

  <feed>
  
  
  
  
  
  File /tmp/feed2.ffm
  
  FileMaxSize 64M
  
  
  
  ACL allow 127.0.0.1
  
  
  
  </feed>
  
  
  
  <feed>
  
  
  
  
  
    File /tmp/feed3.ffm
  
    FileMaxSize 64M
  
  
  
    ACL allow 127.0.0.1
  
  
  
  </feed>
  
  
  
  
  
  <feed>
  
  
  
  
  
    File /tmp/feed4.ffm
  
    FileMaxSize 64M
  
  
  
    ACL allow 127.0.0.1
  
  
  
  </feed>

  these are my stream

  MP3 audio

  <stream>
  
  Feed feed1.ffm
  
  Format mp2
  
  #AudioCodec mp3
  
  AudioBitRate 64
  
  AudioChannels 2
  
  AudioSampleRate 44100
  
  NoVideo
  
  </stream>
  
  
  
  <stream>
  
  Feed feed2.ffm
  
  Format mp2
  
  #AudioCodec mp3
  
  AudioBitRate 64
  
  AudioChannels 2
  
  AudioSampleRate 44100
  
  NoVideo
  
  </stream>
  
  
  
  <stream>
  
  Feed feed3.ffm
  
  Format mp2
  
  #AudioCodec mp3
  
  AudioBitRate 64
  
  AudioChannels 2
  
  AudioSampleRate 44100
  
  NoVideo
  
  </stream>

• Evolution #3964 : mise en forme minimum des formulaires

  25 mars 2018, par nico d_

  Je relance sur ce ticket, je suis totalement pour intégrer ces styles minimaux.
  Go ?

  A noter qu’il y a aussi des surcharges dans theme.css, qui passent par dessus, notamment sur fieldset (margin : 0).

  Après, sur le détail je ne suis pas fan du border-top sur le fieldset, peut être un souligné gris léger sous la legende serait plus discret :
  h3.legend { font-size: 140%; line-height: 135%; font-weight: bold; padding-bottom: 0.2em; border-bottom: 1px solid #CCCCCC;}
  Mais bon ça se discute :)

  Par contre, je découvre tout en bas de form.css :
  

  @media print 
    form  display : none ; 
  
  

  Ouate ze phoque ? O_o