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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)

• Can't read video using VideoCapture in Opencv

  8 mai 2018, par batuman

  I have installed Opencv 2.4.13.6 at my Ubuntu 16.04 OS.
  I have ffmpeg and during Opencv installation I made WITH_FFMPEG ON.
  My ffmpeg is working.
  If I type ffmpeg at command window, I have

  ffmpeg version N-90982-gb995ec0 Copyright (c) 2000-2018 the FFmpeg developers
  
  
  
    built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.9) 20160609
  
    configuration: --prefix=/home/nyan/ffmpeg_build --enable-shared --extra-cflags=-I/home/nyan/ffmpeg_build/include --extra-ldflags=-L/home/nyan/ffmpeg_build/lib --extra-libs='-lpthread -lm' --bindir=/home/nyan/bin --enable-gpl --enable-libass --enable-libfdk-aac --enable-libfreetype --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --enable-nonfree
  
    libavutil      56. 18.100 / 56. 18.100
  
    libavcodec     58. 19.100 / 58. 19.100
  
    libavformat    58. 13.101 / 58. 13.101
  
    libavdevice    58.  4.100 / 58.  4.100
  
    libavfilter     7. 21.100 /  7. 21.100
  
    libswscale      5.  2.100 /  5.  2.100
  
    libswresample   3.  2.100 /  3.  2.100
  
    libpostproc    55.  2.100 / 55.  2.100
  
  Hyper fast Audio and Video encoder
  
  usage: ffmpeg [options] [[infile options] -i infile]... {[outfile options] outfile}...

  Then I have put ffmpeg paths to .bashrc as

  export PATH=/home/bin${PATH:+:${PATH}}
  
  export PATH=/home/ffmpeg_build${PATH:+:${PATH}}
  
  export PATH=/home/ffmpeg_build/include${PATH:+:${PATH}}
  
  export LD_LIBRARY_PATH=/home/ffmpeg_build/lib${LD_LIBRARY_PATH:+:${LD_LIBRARY_PATH}}

  In my Opencv libraries I have libopencv_video.so. So video input/output should be fine.

  My following program gives me "can't read video". What could be the reason ?

  I tried VideoCapture cap(0); gives me same error. What is wrong ?

  #include <opencv2></opencv2>opencv.hpp>
  
  using namespace cv;
  
  using namespace std;
  
  
  
  int main(void){
  
  
  
      VideoCapture cap("IMG_5715.MOV"); // open the default camera
  
      if(!cap.isOpened())  // check if we succeeded
  
      {
  
          cout &lt;&lt; "can't read video"&lt;&lt; endl;
  
          return -1;
  
      }
  
  
  
      while(1){ 
  
      Mat frame;
  
      // Capture frame-by-frame
  
      cap >> frame;
  
          imshow( "Frame", frame );
  
          waitKey(1);
  
      // If the frame is empty, break immediately
  
      if (frame.empty())
  
         break; 
  
      }
  
  
  
      cap.release();
  
      return 0;
  
  }

• FFMPEG failing to convert mov to flv

  3 mai 2018, par scripter78

  FFMPEG issue that I am not familiar with. seems to only happen with this particular file. Anyone by any chance can take a look at this long out put and provide any feedback on what might actually be causing this ?

  ffmpeg_18.exe -i "E:\TESTFILES\115637.mov" -vcodec libx264 -b:v 700k -s 720x480 -r 29.97 -pix_fmt yuv420p -vf yadif -aspect 4:3 -acodec libvo_aacenc -b:a 96k -ar 44100 -f mp4 -y "E:\TESTFILES\test\115637.flv"
  
  ffmpeg version N-39877-g4fa706a Copyright (c) 2000-2012 the FFmpeg developers
  
    built on Apr 16 2012 14:53:47 with gcc 4.6.3
  
    configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-runtime-cpudetect --enable-avisynth --enable-bzlib --enable-frei0r --enable-libass --enable-libcelt --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libfreetype --enable-libgsm --enable-libmp3lame --enable-li
  
  bnut --enable-libopenjpeg --enable-librtmp --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libutvideo --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --enable-libxvid --enable-zlib
  
    libavutil      51. 46.100 / 51. 46.100
  
    libavcodec     54. 14.101 / 54. 14.101
  
    libavformat    54.  3.100 / 54.  3.100
  
    libavdevice    53.  4.100 / 53.  4.100
  
    libavfilter     2. 70.100 /  2. 70.100
  
    libswscale      2.  1.100 /  2.  1.100
  
    libswresample   0. 11.100 /  0. 11.100
  
    libpostproc    52.  0.100 / 52.  0.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'E:\TESTFILES\115637.mov':
  
    Metadata:
  
      major_brand     : qt
  
      minor_version   : 537199360
  
      compatible_brands: qt
  
      creation_time   : 2018-05-03 20:48:28
  
    Duration: 00:00:30.03, start: 0.000000, bitrate: 154663 kb/s
  
      Stream #0:0(eng): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1920x1080, 151585 kb/s, SAR 1920:1920 DAR 16:9, 29.97 fps, 29.97 tbr, 30k tbn, 60k tbc
  
      Metadata:
  
        creation_time   : 2018-05-03 20:48:28
  
        handler_name    : Apple Alias Data Handler
  
      Stream #0:1(eng): Audio: pcm_s16le (lpcm / 0x6D63706C), 48000 Hz, 4 channels, s16, 3072 kb/s
  
      Metadata:
  
        creation_time   : 2018-05-03 20:48:28
  
        handler_name    : Apple Alias Data Handler
  
      Stream #0:2(eng): Data: none (tmcd / 0x64636D74)
  
      Metadata:
  
        creation_time   : 2018-05-03 20:51:29
  
        handler_name    : Apple Alias Data Handler
  
        timecode        : 00:00:00;00
  
  [buffer @ 035c33a0] w:1920 h:1080 pixfmt:yuv420p tb:1/1000000 sar:1920/1920 sws_param:flags=2
  
  [yadif @ 01e7caa0] mode:0 parity:-1 auto_enable:0
  
  [scale @ 01e7c6a0] w:1920 h:1080 fmt:yuv420p sar:1920/1920 -> w:720 h:480 fmt:yuv420p sar:32/27 flags:0x4
  
  [libx264 @ 035b8c40] using SAR=8/9
  
  [libx264 @ 035b8c40] using cpu capabilities: MMX2 SSE2Fast SSSE3 FastShuffle SSE4.2 AVX FMA3
  
  [libx264 @ 035b8c40] profile High, level 3.0
  
  [libx264 @ 035b8c40] 264 - core 120 r2164 da19765 - H.264/MPEG-4 AVC codec - Copyleft 2003-2012 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,
  
  11 fast_pskip=1 chroma_qp_offset=-2 threads=24 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=abr mbtree=1 bitra
  
  te=700 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
  
  [libvo_aacenc @ 01e7bae0] Unable to set encoding parameters
  
  Output #0, mp4, to 'E:\TESTFILES\test\115637.flv':
  
    Metadata:
  
      major_brand     : qt
  
      minor_version   : 537199360
  
      compatible_brands: qt
  
      creation_time   : 2018-05-03 20:48:28
  
      Stream #0:0(eng): Video: h264, yuv420p, 720x480 [SAR 8:9 DAR 4:3], q=-1--1, 700 kb/s, 90k tbn, 29.97 tbc
  
      Metadata:
  
        creation_time   : 2018-05-03 20:48:28
  
        handler_name    : Apple Alias Data Handler
  
      Stream #0:1(eng): Audio: aac, 44100 Hz, 4 channels, s16, 96 kb/s
  
      Metadata:
  
        creation_time   : 2018-05-03 20:48:28
  
        handler_name    : Apple Alias Data Handler
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (h264 -> libx264)
  
    Stream #0:1 -> #0:1 (pcm_s16le -> libvo_aacenc)
  
  Error while opening encoder for output stream #0:1 - maybe incorrect parameters such as bit_rate, rate, width or height