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• How to specify streams by pid with ffmpeg, If the value of pid is duplicated ?

  22 novembre 2019, par Bo Wang

  I have a nice m2ts file and I would like to demux specific audio streams from it. Of important, this specification is needed to use PID as identifier.
  The exemplified m2ts file has 7 audio streams, which is detected by eac3to and shown below

  eac3to.exe F:\xxx 1)
  
  M2TS, 1 video track, 7 audio tracks, 5 subtitle tracks, 1:40:03
  
  1: Chapters, 34 chapters
  
  2: h265/HEVC, 2160p24 /1.001 (16:9), 10 bits
  
  3: TrueHD/AC3 (Atmos), English, 7.1 channels, 48kHz, dialnorm: -28dB
  
     (embedded: AC3, 5.1 channels, 640kbps, 48kHz, dialnorm: -27dB)
  
  4: E-AC3, English, 7.1 channels, 1024kbps, 48kHz, dialnorm: -28dB
  
     (core: AC3, 5.1 channels, 576kbps, 48kHz, dialnorm: -28dB)
  
  5: AC3, English, 5.1 channels, 640kbps, 48kHz, dialnorm: -27dB
  
  6: AC3, English, 2.0 channels, 320kbps, 48kHz, dialnorm: -27dB
  
  7: AC3, English, 2.0 channels, 320kbps, 48kHz, dialnorm: -27dB
  
  8: AC3, Chinese, 2.0 channels, 448kbps, 48kHz
  
  9: AC3, Chinese, 5.1 channels, 384kbps, 48kHz, 300ms
  
  10: Subtitle (PGS), English
  
  11: Subtitle (PGS), Chinese
  
  12: Subtitle (PGS), Chinese
  
  13: Subtitle (PGS), Chinese
  
  14: Subtitle (PGS), Chinese

  However, if I run
  ffmpeg.exe -hide_banner -i "F:\xxx\BDMV\STREAM\00055.m2ts", ffmpeg shows an additional audio stream as it recognizes the embedded 5.1 AC3 stream inside the 7.1 TrueHD audio stream, as independent :

  Input #0, mpegts, from 'F:\xxx\BDMV\STREAM\00055.m2ts':
  
    Duration: 00:00:48.62, start: 4198.333333, bitrate: 50005 kb/s
  
    Program 1
  
      Stream #0:0[0x1011]: Video: hevc (Main 10) (HDMV / 0x564D4448), yuv420p10le(tv, bt2020nc/bt2020/smpte2084), 3840x2160 [SAR 1:1 DAR 16:9], 23.98 fps, 23.98 tbr, 90k tbn, 23.98 tbc
  
      Stream #0:1[0x1100]: Audio: truehd (AC-3 / 0x332D4341), 48000 Hz, 7.1, s32 (24 bit)
  
      Stream #0:2[0x1100]: Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz, 5.1(side), fltp, 640 kb/s
  
      Stream #0:3[0x1101]: Audio: eac3 (AC-3 / 0x332D4341), 48000 Hz, 7.1, fltp, 1024 kb/s
  
      Stream #0:4[0x1102]: Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz, 5.1(side), fltp, 640 kb/s
  
      Stream #0:5[0x1103]: Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz, stereo, fltp, 320 kb/s
  
      Stream #0:6[0x1104]: Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz, stereo, fltp, 320 kb/s
  
      Stream #0:7[0x1105]: Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz, stereo, fltp, 448 kb/s
  
      Stream #0:8[0x1106]: Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz, 5.1(side), fltp, 384 kb/s
  
      Stream #0:9[0x12a0]: Subtitle: hdmv_pgs_subtitle ([144][0][0][0] / 0x0090)
  
      Stream #0:10[0x12a1]: Subtitle: hdmv_pgs_subtitle ([144][0][0][0] / 0x0090)
  
      Stream #0:11[0x12a2]: Subtitle: hdmv_pgs_subtitle ([144][0][0][0] / 0x0090)
  
      Stream #0:12[0x12a3]: Subtitle: hdmv_pgs_subtitle ([144][0][0][0] / 0x0090)
  
      Stream #0:13[0x12a4]: Subtitle: hdmv_pgs_subtitle ([144][0][0][0] / 0x0090)

  It can be found that the Stream #0:1 and Stream #0:2 have the same PID 0x1100. And ffmpeg.exe -hide_banner -i "F:\xxx\BDMV\STREAM\00055.m2ts" -map i:0x1100 -c copy 00055-0x1100.thd will yield error :

  [truehd @ 0000021ae9517600] truehd files have exactly one stream
  
  Could not write header for output file #0 (incorrect codec parameters ?): Invalid argument
  
  Stream mapping:
  
    Stream #0:1 -> #0:0 (copy)
  
    Stream #0:2 -> #0:1 (copy)
  
      Last message repeated 1 times

  By contrast, it works by giving other pids without duplication, such as ffmpeg.exe -hide_banner -i "F:\xxx\BDMV\STREAM\00055.m2ts" -map i:0x1101 -c copy 00055-0x1101.eac3 :

  Input #0, mpegts, from 'F:\xxx\BDMV\STREAM\00055.m2ts':
  
    Duration: 00:00:48.62, start: 4198.333333, bitrate: 50005 kb/s
  
    Program 1
  
      Stream #0:0[0x1011]: Video: hevc (Main 10) (HDMV / 0x564D4448), yuv420p10le(tv, bt2020nc/bt2020/smpte2084), 3840x2160 [SAR 1:1 DAR 16:9], 23.98 fps, 23.98 tbr, 90k tbn, 23.98 tbc
  
      Stream #0:1[0x1100]: Audio: truehd (AC-3 / 0x332D4341), 48000 Hz, 7.1, s32 (24 bit)
  
      Stream #0:2[0x1100]: Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz, 5.1(side), fltp, 640 kb/s
  
      Stream #0:3[0x1101]: Audio: eac3 (AC-3 / 0x332D4341), 48000 Hz, 7.1, fltp, 1024 kb/s
  
      Stream #0:4[0x1102]: Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz, 5.1(side), fltp, 640 kb/s
  
      Stream #0:5[0x1103]: Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz, stereo, fltp, 320 kb/s
  
      Stream #0:6[0x1104]: Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz, stereo, fltp, 320 kb/s
  
      Stream #0:7[0x1105]: Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz, stereo, fltp, 448 kb/s
  
      Stream #0:8[0x1106]: Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz, 5.1(side), fltp, 384 kb/s
  
      Stream #0:9[0x12a0]: Subtitle: hdmv_pgs_subtitle ([144][0][0][0] / 0x0090)
  
      Stream #0:10[0x12a1]: Subtitle: hdmv_pgs_subtitle ([144][0][0][0] / 0x0090)
  
      Stream #0:11[0x12a2]: Subtitle: hdmv_pgs_subtitle ([144][0][0][0] / 0x0090)
  
      Stream #0:12[0x12a3]: Subtitle: hdmv_pgs_subtitle ([144][0][0][0] / 0x0090)
  
      Stream #0:13[0x12a4]: Subtitle: hdmv_pgs_subtitle ([144][0][0][0] / 0x0090)
  
  Output #0, eac3, to '00055-0x1101.eac3':
  
    Metadata:
  
      encoder         : Lavf58.34.101
  
      Stream #0:0: Audio: eac3 (AC-3 / 0x332D4341), 48000 Hz, 7.1, fltp, 1024 kb/s
  
  Stream mapping:
  
    Stream #0:3 -> #0:0 (copy)
  
  Press [q] to stop, [?] for help
  
  size=    6076kB time=00:00:48.57 bitrate=1024.7kbits/s speed=92.6x
  
  video:0kB audio:6076kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.000000%

  In this case, how can I specify the streams by PID ?

• How to find an audio channel layout of a video an then apply it to an another video

  3 janvier 2023, par someCO_OLguy

  We have a video of an audio channel layout, let's say BL. We don't know the format. We need to find the layout of that video and apply to a different video, assuming that each video only has 1 channel.

  


  I tried a lot, and still I can't find an answer that could work

  


• FFMPEG images to video + overlay video

  7 novembre 2018, par AK47

  I am trying to make 15 second video where the background layer is a video made up of 2 images, the first line creates a 15 second video from 2 images.

  I chose a small framerate so it renders an mp4 quickly. I then overlay a webm video (which has transparency) over the images. The final video seems to keep the framerate of 2, but i would rather keep the 24 framerate of the webm video.

  Is this possible ? & is it also possible to turn the below into 1 statement.

  ffmpeg -loop 1 -framerate 2 -t 11 -i image1.png -loop 1 -framerate 2 -t 4 -i image2.png -filter_complex "[0][1]concat=n=2" backgroundvideo.mp4;
  
  ffmpeg -i backgroundvideo.mp4 -c:v libvpx-vp9 -i overlayvideo.webm -filter_complex overlay newvid.mp4