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• FFMPEG Video Capture fails

  20 août 2018, par Ankur Tripathi

  I am trying to capture video using FFmpeg and Directshow(https://github.com/rdp/screen-capture-recorder-to-video-windows-free) filter but it works sometimes and fails some time

  Start FFmpeg

  arguments= -y -rtbufsize 100M -f dshow -framerate 60 -i
  video="screen-capture-recorder":audio="Microphone Array (Realtek
  Audio)" -c:v libx264 -r 60 -preset ultrafast -tune zerolatency -crf 28
  -pix_fmt yuv420p -s 940x576 -c:a aac -strict -2 -ac 2 -b:a 128k "C :\Users\ankur\AppData\Roaming\Take by MangoApps\Recent\Temp\1.mp4"

  Stop FFmpeg

      Call WriteInput("q"); 
  
      public void WriteInput(string input)
  
          {
  
              if (processRunning && process != null && process.StartInfo != 
  
                  null && process.StartInfo.RedirectStandardInput)
  
              {
  
                  process.StandardInput.WriteLine(input);
  
              }
  
          }

  Getting Error

   8/20/2018 6:56:54 PM - ****VIDEO ERROffmpeg version N-84348-gdb7a05d Copyright (c) 2000-2017 the FFmpeg developers
  
            built with gcc 6.3.0 (GCC)
  
            configuration: --enable-gpl --enable-version3 --enable-cuda --enable-cuvid --enable-d3d11va --enable-dxva2 --enable-libmfx --enable-nvenc --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-lzma --enable-zlib
  
            libavutil      55. 50.100 / 55. 50.100
  
            libavcodec     57. 83.101 / 57. 83.101
  
            libavformat    57. 66.105 / 57. 66.105
  
            libavdevice    57.  3.100 / 57.  3.100
  
            libavfilter     6. 78.100 /  6. 78.100
  
            libswscale      4.  3.101 /  4.  3.101
  
            libswresample   2.  4.100 /  2.  4.100
  
            libpostproc    54.  2.100 / 54.  2.100
  
          Guessed Channel Layout for Input Stream #0.1 : stereo
  
          Input #0, dshow, from 'video=screen-capture-recorder:audio=Microphone Array (Realtek Audio)':
  
            Duration: N/A, start: 29271.852000, bitrate: N/A
  
              Stream #0:0: Video: rawvideo, bgr0, 940x576, 60 fps, 60 tbr, 10000k tbn, 10000k tbc
  
              Stream #0:1: Audio: pcm_s16le, 44100 Hz, stereo, s16, 1411 kb/s
  
          Stream mapping:
  
            Stream #0:0 -> #0:0 (rawvideo (native) -> h264 (libx264))
  
            Stream #0:1 -> #0:1 (pcm_s16le (native) -> aac (native))
  
          Press [q] to stop, [?] for help
  
          [libx264 @ 0000000002553d40] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 AVX2 LZCNT BMI2
  
          [libx264 @ 0000000002553d40] profile Constrained Baseline, level 3.2
  
          [libx264 @ 0000000002553d40] 264 - core 148 r2762 90a61ec - H.264/MPEG-4 AVC codec - Copyleft 2003-2017 - http://www.videolan.org/x264.html - options: cabac=0 ref=1 deblock=0:0:0 analyse=0:0 me=dia subme=0 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=0 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=0 threads=4 lookahead_threads=4 sliced_threads=1 slices=4 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=0 keyint=250 keyint_min=25 scenecut=0 intra_refresh=0 rc=crf mbtree=0 crf=28.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=0
  
          Output #0, mp4, to 'C:\Users\ankur\AppData\Roaming\Take\Recent\Temp\0.mp4':
  
            Metadata:
  
              encoder         : Lavf57.66.105
  
              Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p(progressive), 940x576, q=-1--1, 60 fps, 15360 tbn, 60 tbc
  
              Metadata:
  
                encoder         : Lavc57.83.101 libx264
  
              Side data:
  
                cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
  
              Stream #0:1: Audio: aac (LC) ([64][0][0][0] / 0x0040), 44100 Hz, stereo, fltp, 128 kb/s
  
              Metadata:
  
                encoder         : Lavc57.83.101 aac
  
          frame=   31 fps=0.0 q=27.0 size=     125kB time=00:00:00.50 bitrate=2043.9kbits/s speed=0.991x    
  
          frame=   62 fps= 61 q=20.0 size=     189kB time=00:00:01.01 bitrate=1522.0kbits/s speed=1.01x    
  
          frame=   93 fps= 61 q=22.0 size=     220kB time=00:00:01.53 bitrate=1177.1kbits/s speed=1.01x    
  
          frame=  123 fps= 61 q=20.0 size=     253kB time=00:00:02.03 bitrate=1018.2kbits/s speed=1.01x    
  
          frame=  153 fps= 61 q=20.0 size=     263kB time=00:00:02.53 bitrate= 851.5kbits/s speed=   1x    
  
          frame=  184 fps= 61 q=23.0 size=     273kB time=00:00:03.05 bitrate= 734.0kbits/s speed=1.01x    
  
          frame=  214 fps= 61 q=20.0 size=     323kB time=00:00:03.55 bitrate= 745.4kbits/s speed=   1x    
  
          frame=  244 fps= 60 q=20.0 size=     341kB time=00:00:04.05 bitrate= 689.7kbits/s speed=   1x    
  
          frame=  274 fps= 60 q=22.0 size=     465kB time=00:00:04.55 bitrate= 837.4kbits/s speed=   1x    

• FFMPEG split video to segments with audio

  28 septembre 2020, par Kiril Mytsykov

  I'm tying to split mov file to .ts segments with m3u8 playlist.
All is ok except of audio. Audio doesn't work and it seems that ffmpeg ignores audio stream.

  


  This is my command :

  


  ffmpeg -i stepteen2.mov 
       -c:a aac 
       -c:v libx264 
       -an 
       -map 0 
       -muxdelay 0 
       -muxpreload 0 
       -output_ts_offset 0 
       -segment_time 2 
       -segment_wrap 1000 
       -segment_list_size 0 
       -segment_list temp.m3u8 
       -segment_list_flags +cache 
       -segment_list_type m3u8 
       -f segment 
       temp-%03d.ts


  


  After this command I receive 5 ts segments and m3u8 playlist with segment paths list.
If I open properties of segment files there are no any information in Audio and Video tabs (although video works)

  


  This is output :

  


  ffmpeg version n4.1.4 Copyright (c) 2000-2019 the FFmpeg developers
  built with gcc 7 (Ubuntu 7.4.0-1ubuntu1~18.04.1)
  configuration: --prefix= --prefix=/usr --disable-debug --disable-doc --disable-static --enable-avisynth --enable-cuda --enable-cuvid --enable-libdrm --enable-ffplay --enable-gnutls --enable-gpl --enable-libass --enable-libfdk-aac --enable-libfontconfig --enable-libfreetype --enable-libmp3lame --enable-libopencore_amrnb --enable-libopencore_amrwb --enable-libopus --enable-libpulse --enable-sdl2 --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libv4l2 --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --enable-libxcb --enable-libxvid --enable-nonfree --enable-nvenc --enable-omx --enable-openal --enable-opencl --enable-runtime-cpudetect --enable-shared --enable-vaapi --enable-vdpau --enable-version3 --enable-xlib
  libavutil      56. 22.100 / 56. 22.100
  libavcodec     58. 35.100 / 58. 35.100
  libavformat    58. 20.100 / 58. 20.100
  libavdevice    58.  5.100 / 58.  5.100
  libavfilter     7. 40.101 /  7. 40.101
  libswscale      5.  3.100 /  5.  3.100
  libswresample   3.  3.100 /  3.  3.100
  libpostproc    55.  3.100 / 55.  3.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'stepteen2.mov':
  Metadata:
    creation_time   : 1998-11-12T18:28:20.000000Z
  Duration: 00:00:28.60, start: 0.000000, bitrate: 111 kb/s
    Stream #0:0(eng): Video: svq1 (SVQ1 / 0x31515653), yuv410p, 160x120, 90 kb/s, 7.52 fps, 7.50 tbr, 600 tbn, 600 tbc (default)
    Metadata:
      creation_time   : 1998-11-12T18:28:20.000000Z
      handler_name    : Apple Video Media Handler
      encoder         : Sorenson Video
    Stream #0:1(eng): Audio: qdmc (QDMC / 0x434D4451), 44100 Hz, mono, s16, 20 kb/s (default)
    Metadata:
      creation_time   : 1998-11-12T18:28:20.000000Z
      handler_name    : Apple Sound Media Handler
Stream mapping:
  Stream #0:0 -> #0:0 (svq1 (native) -> h264 (libx264))
Press [q] to stop, [?] for help
[libx264 @ 0x55a5a80b8dc0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
[libx264 @ 0x55a5a80b8dc0] profile High, level 1.0
[libx264 @ 0x55a5a80b8dc0] 264 - core 152 r2854 e9a5903 - H.264/MPEG-4 AVC codec - Copyleft 2003-2017 - 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=4 lookahead_threads=1 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=7 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
[segment @ 0x55a5a7fd2e00] Opening 'temp-000.ts' for writing
Output #0, segment, to 'temp-%03d.ts':
  Metadata:
    encoder         : Lavf58.20.100
    Stream #0:0(eng): Video: h264 (libx264), yuv420p, 160x120, q=-1--1, 7.50 fps, 90k tbn, 7.50 tbc (default)
    Metadata:
      creation_time   : 1998-11-12T18:28:20.000000Z
      handler_name    : Apple Video Media Handler
      encoder         : Lavc58.35.100 libx264
    Side data:
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
[segment @ 0x55a5a7fd2e00] Opening 'temp.m3u8.tmp' for writing
[segment @ 0x55a5a7fd2e00] Opening 'temp-001.ts' for writing
[segment @ 0x55a5a7fd2e00] Opening 'temp.m3u8.tmp' for writing
[segment @ 0x55a5a7fd2e00] Opening 'temp-002.ts' for writing
[segment @ 0x55a5a7fd2e00] Opening 'temp.m3u8.tmp' for writing
[segment @ 0x55a5a7fd2e00] Opening 'temp-003.ts' for writing
[segment @ 0x55a5a7fd2e00] Opening 'temp.m3u8.tmp' for writing
[segment @ 0x55a5a7fd2e00] Opening 'temp-004.ts' for writing
[segment @ 0x55a5a7fd2e00] Opening 'temp.m3u8.tmp' for writing
[segment @ 0x55a5a7fd2e00] Opening 'temp-005.ts' for writing
[segment @ 0x55a5a7fd2e00] Opening 'temp.m3u8.tmp' for writing
frame=  215 fps=0.0 q=-1.0 Lsize=N/A time=00:00:28.26 bitrate=N/A speed= 162x    
video:217kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
[libx264 @ 0x55a5a80b8dc0] frame I:8     Avg QP:14.15  size:  2625
[libx264 @ 0x55a5a80b8dc0] frame P:93    Avg QP:21.28  size:  1295
[libx264 @ 0x55a5a80b8dc0] frame B:114   Avg QP:24.62  size:   703
[libx264 @ 0x55a5a80b8dc0] consecutive B-frames: 27.0%  2.8% 12.6% 57.7%
[libx264 @ 0x55a5a80b8dc0] mb I  I16..4: 28.3% 23.0% 48.8%
[libx264 @ 0x55a5a80b8dc0] mb P  I16..4:  1.5%  6.2%  7.0%  P16..4: 21.3% 17.8% 15.1%  0.0%  0.0%    skip:31.1%
[libx264 @ 0x55a5a80b8dc0] mb B  I16..4:  1.2%  1.8%  1.5%  B16..8: 28.1% 16.0% 10.0%  direct:11.0%  skip:30.4%  L0:43.4% L1:31.9% BI:24.8%
[libx264 @ 0x55a5a80b8dc0] 8x8 transform intra:35.9% inter:39.5%
[libx264 @ 0x55a5a80b8dc0] coded y,uvDC,uvAC intra: 73.6% 71.0% 48.2% inter: 34.9% 32.7% 4.3%
[libx264 @ 0x55a5a80b8dc0] i16 v,h,dc,p: 61% 12% 26%  2%
[libx264 @ 0x55a5a80b8dc0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 32% 14% 23%  5%  4%  5%  4%  7%  6%
[libx264 @ 0x55a5a80b8dc0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 31% 16% 15%  6%  5%  8%  6%  7%  7%
[libx264 @ 0x55a5a80b8dc0] i8c dc,h,v,p: 53% 17% 21%  9%
[libx264 @ 0x55a5a80b8dc0] Weighted P-Frames: Y:14.0% UV:9.7%
[libx264 @ 0x55a5a80b8dc0] ref P L0: 65.2% 16.8% 12.2%  5.4%  0.4%
[libx264 @ 0x55a5a80b8dc0] ref B L0: 92.3%  6.2%  1.4%
[libx264 @ 0x55a5a80b8dc0] ref B L1: 97.3%  2.7%
[libx264 @ 0x55a5a80b8dc0] kb/s:61.84


  


  I see that Output #0, segment, to 'temp-%03d.ts' contains only video stream :

  


  Stream #0:0(eng): Video: h264 (libx264), yuv420p, 160x120, q=-1--1, 7.50 fps, 90k tbn, 7.50 tbc (default)
...
video:217kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown


  


• ffmpeg xfade audio out of sync

  1er décembre 2020, par Richard

  hi I am using ffmpeg xfade to concat two clips, the transition looks fine, but the second clip has no audio in the output. I don't find more information about this in https://trac.ffmpeg.org/wiki/Xfade and the official doc. Can I keep the audio of both clips in sync ?

  


  I'm puttting the complete log below, it's massive

  


  ffmpeg -i teacher1.mp4 -i teacher2.mp4 -filter_complex xfade=transition=fadewhite:duration=1:offset=14.5 output.mp4
ffmpeg version 4.3.1-static https://johnvansickle.com/ffmpeg/  Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 8 (Debian 8.3.0-6)
  configuration: --enable-gpl --enable-version3 --enable-static --disable-debug --disable-ffplay --disable-indev=sndio --disable-outdev=sndio --cc=gcc --enable-fontconfig --enable-frei0r --enable-gnutls --enable-gmp --enable-libgme --enable-gray --enable-libaom --enable-libfribidi --enable-libass --enable-libvmaf --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librubberband --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libvorbis --enable-libopus --enable-libtheora --enable-libvidstab --enable-libvo-amrwbenc --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libdav1d --enable-libxvid --enable-libzvbi --enable-libzimg
  libavutil      56. 51.100 / 56. 51.100
  libavcodec     58. 91.100 / 58. 91.100
  libavformat    58. 45.100 / 58. 45.100
  libavdevice    58. 10.100 / 58. 10.100
  libavfilter     7. 85.100 /  7. 85.100
  libswscale      5.  7.100 /  5.  7.100
  libswresample   3.  7.100 /  3.  7.100
  libpostproc    55.  7.100 / 55.  7.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'teacher1.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf58.29.100
  Duration: 00:00:15.02, start: 0.000000, bitrate: 2447 kb/s
    Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1920x1080, 2315 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 128 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
Input #1, mov,mp4,m4a,3gp,3g2,mj2, from 'teacher2.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf58.29.100
  Duration: 00:00:15.02, start: 0.000000, bitrate: 1643 kb/s
    Stream #1:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1920x1080, 1509 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #1:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 128 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
Stream mapping:
  Stream #0:0 (h264) -> xfade:main (graph 0)
  Stream #1:0 (h264) -> xfade:xfade (graph 0)
  xfade (graph 0) -> Stream #0:0 (libx264)
  Stream #0:1 -> #0:1 (aac (native) -> aac (native))
Press [q] to stop, [?] for help
[libx264 @ 0x64603c0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
[libx264 @ 0x64603c0] profile High 4:4:4 Predictive, level 4.0, 4:4:4, 8-bit
[libx264 @ 0x64603c0] 264 - core 161 r3018 db0d417 - H.264/MPEG-4 AVC codec - Copyleft 2003-2020 - 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=4 threads=6 lookahead_threads=1 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=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, mp4, to 'output.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf58.45.100
    Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuv444p, 1920x1080, q=-1--1, 25 fps, 12800 tbn, 25 tbc (default)
    Metadata:
      encoder         : Lavc58.91.100 libx264
    Side data:
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 128 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
      encoder         : Lavc58.91.100 aac
frame=  738 fps= 25 q=-1.0 Lsize=    7317kB time=00:00:29.40 bitrate=2038.9kbits/s speed=1.01x    
video:7064kB audio:236kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.241368%
[libx264 @ 0x64603c0] frame I:8     Avg QP:16.56  size:100307
[libx264 @ 0x64603c0] frame P:332   Avg QP:19.50  size: 15211
[libx264 @ 0x64603c0] frame B:398   Avg QP:24.35  size:  3467
[libx264 @ 0x64603c0] consecutive B-frames:  6.2% 62.6%  8.9% 22.2%
[libx264 @ 0x64603c0] mb I  I16..4: 18.7% 60.5% 20.9%
[libx264 @ 0x64603c0] mb P  I16..4:  4.5%  7.6%  0.6%  P16..4: 24.1%  5.6%  1.9%  0.0%  0.0%    skip:55.7%
[libx264 @ 0x64603c0] mb B  I16..4:  0.4%  0.5%  0.1%  B16..8: 14.3%  0.9%  0.1%  direct: 0.4%  skip:83.3%  L0:42.9% L1:53.9% BI: 3.3%
[libx264 @ 0x64603c0] 8x8 transform intra:59.2% inter:84.3%
[libx264 @ 0x64603c0] coded y,u,v intra: 25.3% 11.9% 13.0% inter: 3.2% 1.7% 1.8%
[libx264 @ 0x64603c0] i16 v,h,dc,p: 49% 25% 15% 12%
[libx264 @ 0x64603c0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 31% 17% 37%  2%  2%  3%  2%  3%  2%
[libx264 @ 0x64603c0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 28% 19% 15%  6%  7%  7%  6%  6%  5%
[libx264 @ 0x64603c0] Weighted P-Frames: Y:3.3% UV:1.5%
[libx264 @ 0x64603c0] ref P L0: 66.0%  8.0% 18.5%  7.5%  0.0%
[libx264 @ 0x64603c0] ref B L0: 84.9% 13.1%  2.0%
[libx264 @ 0x64603c0] ref B L1: 98.8%  1.2%
[libx264 @ 0x64603c0] kb/s:1960.04
[aac @ 0x64d1280] Qavg: 171.394