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  • FFMPEG : Loop multiple videos indefinitely

    4 mai 2018, par stevendesu

    I’ve got an interesting setup. I have four videos which are all identical in duration, identical frame rate, and have identical PTS timestamps. I wish to stream these four videos to an RTMP server but keep them synchronized so that someone switching between the streams will not jump forward or back in time, but instead pick up right where they left off.

    Here’s the command I’m currently using :

    ffmpeg \
    
    -re -stream_loop -1 -fflags +genpts -i 01.mp4 \
    
    -re -stream_loop -1 -fflags +genpts -i 02.mp4 \
    
    -re -stream_loop -1 -fflags +genpts -i 03.mp4 \
    
    -re -stream_loop -1 -fflags +genpts -i 04.mp4 \
    
    -map 0:v -map 0:a \
    
        -c:a speex -ar 16000 -ac 1 \
    
        -c:v libx264 -preset ultrafast \
    
        -b:v 500k -b:a 32k \
    
        -f flv rtmp://output/01 \
    
    -map 1:v -map 1:a \
    
        -c:a speex -ar 16000 -ac 1 \
    
        -c:v libx264 -preset ultrafast \
    
        -b:v 500k -b:a 32k \
    
        -f flv rtmp://output/02 \
    
    -map 2:v -map 2:a \
    
        -c:a speex -ar 16000 -ac 1 \
    
        -c:v libx264 -preset ultrafast \
    
        -b:v 500k -b:a 32k \
    
        -f flv rtmp://output/03 \
    
    -map 3:v -map 3:a \
    
        -c:a speex -ar 16000 -ac 1 \
    
        -c:v libx264 -preset ultrafast \
    
        -b:v 500k -b:a 32k \
    
        -f flv rtmp://output/04

    This command properly synchronizes the streams and broadcasts all four, however the moment the video ends so does the stream. Due to the -stream_loop -1 I would expect the video to keep looping indefinitely. This is the output to stdout when the stream dies :

    [flv @ 0x2392d40] Failed to update header with correct duration.
    
[flv @ 0x2392d40] Failed to update header with correct filesize.
    
[flv @ 0x229b980] Failed to update header with correct duration.
    
[flv @ 0x229b980] Failed to update header with correct filesize.
    
[flv @ 0x22f3bc0] Failed to update header with correct duration.
    
[flv @ 0x22f3bc0] Failed to update header with correct filesize.
    
[flv @ 0x23a4240] Failed to update header with correct duration.
    
[flv @ 0x23a4240] Failed to update header with correct filesize.
    
[libx264 @ 0x25ebd00] frame I:236   Avg QP:29.17  size: 20892
    
[libx264 @ 0x25ebd00] frame P:5412  Avg QP:32.33  size:  1892
    
[libx264 @ 0x25ebd00] mb I  I16..4: 100.0%  0.0%  0.0%
    
[libx264 @ 0x25ebd00] mb P  I16..4:  0.2%  0.0%  0.0%  P16..4: 18.5%  0.0%  0.0%  0.0%  0.0%    skip:81.3%
    
[libx264 @ 0x25ebd00] final ratefactor: 31.62
    
[libx264 @ 0x25ebd00] coded y,uvDC,uvAC intra: 68.8% 62.8% 34.6% inter: 8.8% 1.8% 0.0%
    
[libx264 @ 0x25ebd00] i16 v,h,dc,p: 38% 25% 19% 18%
    
[libx264 @ 0x25ebd00] i8c dc,h,v,p: 40% 22% 27% 11%
    
[libx264 @ 0x25ebd00] kb/s:515.11
    
[libspeex @ 0x2537580] 1 frames left in the queue on closing
    
[libx264 @ 0x2531d00] frame I:236   Avg QP:31.85  size: 15843
    
[libx264 @ 0x2531d00] frame P:5412  Avg QP:34.95  size:  2086
    
[libx264 @ 0x2531d00] mb I  I16..4: 100.0%  0.0%  0.0%
    
[libx264 @ 0x2531d00] mb P  I16..4:  2.8%  0.0%  0.0%  P16..4: 37.8%  0.0%  0.0%  0.0%  0.0%    skip:59.4%
    
[libx264 @ 0x2531d00] final ratefactor: 32.38
    
[libx264 @ 0x2531d00] coded y,uvDC,uvAC intra: 48.4% 40.8% 13.5% inter: 12.1% 4.0% 0.0%
    
[libx264 @ 0x2531d00] i16 v,h,dc,p: 41% 21% 26% 13%
    
[libx264 @ 0x2531d00] i8c dc,h,v,p: 48% 20% 24%  8%
    
[libx264 @ 0x2531d00] kb/s:510.33
    
[libspeex @ 0x2533080] 1 frames left in the queue on closing
    
[libx264 @ 0x22da600] frame I:236   Avg QP:26.11  size: 13705
    
[libx264 @ 0x22da600] frame P:5412  Avg QP:29.17  size:  2185
    
[libx264 @ 0x22da600] mb I  I16..4: 100.0%  0.0%  0.0%
    
[libx264 @ 0x22da600] mb P  I16..4:  4.5%  0.0%  0.0%  P16..4: 35.2%  0.0%  0.0%  0.0%  0.0%    skip:60.3%
    
[libx264 @ 0x22da600] final ratefactor: 28.44
    
[libx264 @ 0x22da600] coded y,uvDC,uvAC intra: 37.1% 40.1% 10.4% inter: 12.3% 6.2% 0.1%
    
[libx264 @ 0x22da600] i16 v,h,dc,p: 40% 21% 22% 17%
    
[libx264 @ 0x22da600] i8c dc,h,v,p: 43% 18% 28% 11%
    
[libx264 @ 0x22da600] kb/s:511.43
    
[libspeex @ 0x22db080] 1 frames left in the queue on closing
    
[libx264 @ 0x22d7a00] frame I:236   Avg QP:30.31  size: 13811
    
[libx264 @ 0x22d7a00] frame P:5412  Avg QP:33.28  size:  2209
    
[libx264 @ 0x22d7a00] mb I  I16..4: 100.0%  0.0%  0.0%
    
[libx264 @ 0x22d7a00] mb P  I16..4:  5.4%  0.0%  0.0%  P16..4: 37.4%  0.0%  0.0%  0.0%  0.0%    skip:57.2%
    
[libx264 @ 0x22d7a00] final ratefactor: 31.52
    
[libx264 @ 0x22d7a00] coded y,uvDC,uvAC intra: 37.9% 36.7% 9.5% inter: 11.4% 5.0% 0.1%
    
[libx264 @ 0x22d7a00] i16 v,h,dc,p: 41% 23% 21% 16%
    
[libx264 @ 0x22d7a00] i8c dc,h,v,p: 45% 19% 27%  9%
    
[libx264 @ 0x22d7a00] kb/s:516.78
    
[libspeex @ 0x22d8d80] 1 frames left in the queue on closing

    My FFMPEG version :

    $ ffmpeg -version
    
ffmpeg version N-90065-g8a8d0b3 Copyright (c) 2000-2018 the FFmpeg developers
    
built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.5) 20160609
    
configuration: --prefix=/home/sbarnett/ffmpeg_build --pkg-config-flags=--static --extra-cflags=-I/home/sbarnett/ffmpeg_build/include --extra-ldflags=-L/home/sbarnett/ffmpeg_build/lib --extra-libs='-lpthread -lm' --bindir=/home/sbarnett/bin --enable-gpl --enable-libass --enable-libfdk-aac --enable-libfreetype --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libspeex --enable-nonfree
    
libavutil      56.  7.101 / 56.  7.101
    
libavcodec     58. 11.101 / 58. 11.101
    
libavformat    58.  9.100 / 58.  9.100
    
libavdevice    58.  1.100 / 58.  1.100
    
libavfilter     7. 12.100 /  7. 12.100
    
libswscale      5.  0.101 /  5.  0.101
    
libswresample   3.  0.101 /  3.  0.101
    
libpostproc    55.  0.100 / 55.  0.100

    How do I get the video to loop indefinitely ? Why is -stream_loop -1 not working ?

    Update (Edited with new error)

    Following @Gyan’s advice, I attempted to use filter_complex with the movie filter, however I may be doing it incorrectly :

    ffmpeg \
    
    -stream_loop -1 \
    
    -re -i 01.mp4 \
    
    -re -i 02.mp4 \
    
    -re -i 03.mp4 \
    
    -re -i 04.mp4 \
    
    -filter_complex \
    
        "movie=01.mp4:loop=0[v1];[v1]setpts=N/FRAME_RATE/TB[v1];
    
         amovie=01.mp4:loop=0[a1];[a1]asetpts=N/SR/TB[a1];
    
         movie=02.mp4:loop=0[v2];[v2]setpts=N/FRAME_RATE/TB[v2];
    
         amovie=02.mp4:loop=0[a2];[a2]asetpts=N/SR/TB[a2];
    
         movie=03.mp4:loop=0[v3];[v3]setpts=N/FRAME_RATE/TB[v3];
    
         amovie=03.mp4:loop=0[a3];[a3]asetpts=N/SR/TB[a3];
    
         movie=04.mp4:loop=0[v4];[v4]setpts=N/FRAME_RATE/TB[v4];
    
         amovie=04.mp4:loop=0[a4];[a4]asetpts=N/SR/TB[a4]" \
    
    -map "[v1]" -map "[a1]" \
    
        -c:a speex -ar 16000 -ac 1 \
    
        -c:v libx264 -preset ultrafast \
    
        -b:v 500k -b:a 32k \
    
        -f flv rtmp://output/01 \
    
    -map "[v2]" -map "[a2]" \
    
        -c:a speex -ar 16000 -ac 1 \
    
        -c:v libx264 -preset ultrafast \
    
        -b:v 500k -b:a 32k \
    
        -f flv rtmp://output/02 \
    
    -map "[v3]" -map "[a3]" \
    
        -c:a speex -ar 16000 -ac 1 \
    
        -c:v libx264 -preset ultrafast \
    
        -b:v 500k -b:a 32k \
    
        -f flv rtmp://output/03 \
    
    -map "[v4]" -map "[a4]" \
    
        -c:a speex -ar 16000 -ac 1 \
    
        -c:v libx264 -preset ultrafast \
    
        -b:v 500k -b:a 32k \
    
        -f flv rtmp://output/04

    This threw the following error :

    [libspeex @ 0x23f4d80] nb_samples (325) != frame_size (320) (avcodec_encode_audio2)

  • Bewildering issue - FFmpeg segment filter desyncs video

    14 mai 2018, par r_jei

    I need to segment a large (72GB) Prores video file and merge the segments to get a file identical to the original.

    ./ffmpeg -i video.mov -codec copy -f segment -segment_time 300 -segment_list list.ffcat -reset_timestamps 1 -v error chunk_%d.mov

    Unfortunately the segments that come from running this command get out of sync after a few seconds of playback with Quicktime Player. Interestingly, seeking, rewinding or fast forwarding appears to resync the video correctly for at least a few seconds.

    The following warning appears whenever a new segment is written :

    [segment @ 0x7f87ae001200] Opening 'chunk_0.mov' for writing
    
[mov @ 0x7f87ad807200] Valid timecode frame rate must be specified. Minimum value is 1

    Yet, setting the framerate with -r 24 doesn’t help.

    Some potentially relevant metadata :

    Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'A004_04121423_C001.mov':
    
  Duration: 00:13:31.25, start: 0.000000, bitrate: 710117 kb/s
    
    Stream #0:0(eng): Video: prores (apch / 0x68637061), yuv422p10le(bt709, progressive), 3840x2160, 707415 kb/s, SAR 1:1 DAR 16:9, 24 fps, 24 tbr, 24 tbn, 24 tbc (default)
    
    Metadata:
    
      creation_time   : 2018-04-12T20:23:16.000000Z
    
      handler_name    : ?Apple Alias Data Handler
    
      timecode        : 14:23:16:02
    
    Stream #0:1(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, stereo, s32 (24 bit), 2304 kb/s (default)
    
    Metadata:
    
      creation_time   : 2018-04-12T20:23:16.000000Z
    
      handler_name    : ?Apple Alias Data Handler
    
      timecode        : 14:23:16:02
    
    Stream #0:2(eng): Data: none (tmcd / 0x64636D74) (default)
    
    Metadata:
    
      creation_time   : 2018-04-12T20:23:16.000000Z
    
      handler_name    : ?Apple Alias Data Handler
    
      timecode        : 14:23:16:02
    

    
Output #0, segment, to 'chunk_%d.mov':
    
    Stream #0:0(eng): Video: prores (apch / 0x68637061), yuv422p10le(bt709, progressive), 3840x2160 [SAR 1:1 DAR 16:9], q=2-31, 707415 kb/s, 24 fps, 24 tbr, 12288 tbn, 24 tbc (default)
    
    Metadata:
    
      creation_time   : 2018-04-12T20:23:16.000000Z
    
      handler_name    : ?Apple Alias Data Handler
    
      timecode        : 14:23:16:02
    
    Stream #0:1(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, stereo, s32 (24 bit), 2304 kb/s (default)
    
    Metadata:
    
      creation_time   : 2018-04-12T20:23:16.000000Z
    
      handler_name    : ?Apple Alias Data Handler
    
      timecode        : 14:23:16:02
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (copy)
    
  Stream #0:1 -> #0:1 (copy)

    I’m on OS X.

    Thanks so much for your time and help on this issue ! I certainly hope I’m not missing something obvious :)

    UPDATE (May 10) : Comparing the original video file with the segments, I’ve found some interesting differences. Adobe Premiere reports that the original video has the following properties :

    QuickTime Details:
    
Movie contains 1 video track(s), 1 audio track(s), 0 closed caption track(s), **and 1 timecode track(s).**
    

    
Video:
    
There are 19470 frames with a **duration of 1/24th.**
    

    
Video track 1:
    
Duration is **0:13:31:06**
    

    
Video data block #1:
    
Frame Size = 3840 x 2160
    
Compressor = 
    
**Quality = Most (-2623.00)
    
Temporal = Most (1.00)**
    

    
Timecode data block #1:
    
Start Time = 14:23:16:02
    
Reel name =

    On the other hand, when examining the video resulting from stitching together the segments, we find the following :

    QuickTime Details:
    
Movie contains 1 video track(s), 1 audio track(s), 0 closed caption track(s), **and 0 timecode track(s).**
    

    
Video:
    
There are 19470 frames with a **duration of 41/1000ths.**
    

    
Video track 1:
    
Duration is **0:01:06:00**
    

    
Video data block #1:
    
Frame Size = 3840 x 2160
    
Compressor = 
    
**Quality = Normal (3.00)
    
Temporal = Normal (3.00)**

  • youtube-dl sometime hangs with "[ffmpeg] Correcting container"

    20 mai 2018, par user292344

    Ubuntu 16.04

    /usr/local/bin/youtube-dl --version
    
2018.05.09

    I have a bash script that attemts to download a youtube video. The output is below. The problem is that sometimes it works perfectly (completes quickly).
    But most of the time it hangs on "Correcting container....". Does anyone know why ?

    + /usr/local/bin/youtube-dl --verbose -x 'https://www.youtube.com/watch?v=8HVWitAW-Qg'
    

    
[debug] System config: []
    

    
[debug] User config: []
    

    
[debug] Custom config: []
    

    
[debug] Command-line args: [u'--verbose', u'-x', u'https://www.youtube.com/watch?v=8HVWitAW-Qg']
    

    
[debug] Encodings: locale UTF-8, fs UTF-8, out UTF-8, pref UTF-8
    

    
[debug] youtube-dl version 2018.05.09
    

    
[debug] Python version 2.7.12 (CPython) - Linux-4.4.0-124-generic-x86_64-with-Ubuntu-16.04-xenial
    

    
[debug] exe versions: avconv 2.8.14-0ubuntu0.16.04.1, avprobe 2.8.14-0ubuntu0.16.04.1, ffmpeg 2.8.14-0ubuntu0.16.04.1, ffprobe 2.8.14-0ubuntu0.16.04.1, rtmpdump 2.4
    

    
[debug] Proxy map: {}
    

    
[youtube] 8HVWitAW-Qg: Downloading webpage
    

    
[youtube] 8HVWitAW-Qg: Downloading video info webpage
    

    
[youtube] 8HVWitAW-Qg: Extracting video information
    

    
[debug] Invoking downloader on u'https://r5---sn-5uaeznkl.googlevideo.com/videoplayback?expire=1526159728&source=youtube&key=yt6&mime=audio%2Fmp4&sparams=clen%2Cdur%2Cei%2Cgir%2Cid%2Cinitcwndbps%2Cip%2Cipbits%2Citag%2Ckeepalive%2Clmt%2Cmime%2Cmm%2Cmn%2Cms%2Cmv%2Cpl%2Crequiressl%2Csource%2Cusequic%2Cexpire&keepalive=yes&lmt=1518142590597815&dur=231.131&mv=m&mt=1526137933&ms=au%2Conr&signature=18BB34F3716B412AC5757872DD2AF402B6EE20D2.43D2E68B5A5ED2E2D3076DF9264B9BB723484821&ip=71.81.217.251&c=WEB&initcwndbps=1583750&mn=sn-5uaeznkl%2Csn-p5qs7n7l&clen=3671757&gir=yes&id=o-AOxj8Rg2IuZek8KwvgPy-N7_FSGzxQ0Zl2HX1T4gepLf&ipbits=0&fvip=5&ei=EAX3WqbOH8fg4QSlkrGoAg&pl=20&mm=31%2C26&itag=140&usequic=no&requiressl=yes&ratebypass=yes'
    

    
[download] Destination: Top 10 cute kitten videos compilation-8HVWitAW-Qg.m4a
    

    
[download] 100% of 3.50MiB in 00:00
    

    
[ffmpeg] Correcting container in "Top 10 cute kitten videos compilation-8HVWitAW-Qg.m4a"
    

    
[debug] ffmpeg command line: avconv -y -i 'file:Top 10 cute kitten videos compilation-8HVWitAW-Qg.m4a' -c copy -f mp4 'file:Top 10 cute kitten videos compilation-8HVWitAW-Qg.temp.m4a'
    

    
^C
    
ERROR: Interrupted by user

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