raw DV with two audio streams

[logicom]

Any tip on how to include stream 2 from raw dv25 file with ffmpeg or ffmbc ?

ex.

Stream #0:0: Video: dvvideo, yuv420p, 720x576 [SAR 16:15 DAR 4:3], 28800 kb/s, 25 fps, 25 tbr, 25 tbn, 25 tbc
Stream #0:1: Audio: pcm_s16le, 32000 Hz, stereo, s16, 1024 kb/s
Stream #0:2: Audio: pcm_s16le, 32000 Hz, stereo, s16, 1024 kb/s

when I do:

ffmpeg -i inputfile.dv -c:v copy -c:a copy output.dv

I get only first audio channel stream 0:1

once I try

ffmpeg -i inputfile.dv -map 0:0 -map 0:1 -map 0:2 -c:v copy -c:a copy output.dv

[dv @ 051d7ee0] Can't initialize DV format!
Make sure that you supply exactly two streams:
     video: 25fps or 29.97fps, audio: 2ch/48|44|32kHz/PCM
     (50Mbps allows an optional second audio stream)

or

   Stream #0:0: Video: dvvideo, yuv420p, 720x576 [SAR 16:15 DAR 4:3], q=2-31, 28800 kb/s, 25 fps, 25 tbr, 25 tbn, 25 tbc
    Stream #0:1: Audio: pcm_s16le, 32000 Hz, stereo, 1024 kb/s
    Stream #0:2: Audio: pcm_s16le, 32000 Hz, stereo, 1024 kb/s
Stream mapping:
  Stream #0:0 -> #0:0 (copy)
  Stream #0:1 -> #0:1 (copy)
  Stream #0:2 -> #0:2 (copy)
Could not write header for output file #0 (incorrect codec parameters ?): Error number -1 occurred

Regards.

[Cornucopia]

Well, it's clear to me: ffmpeg is designed to utilize only [vids] streams and [auds] streams, not [ivas] streams. Or, if it is actually trying to mux with an [ivas] stream, it doesn't support the full spec of DV.

Note: you have listed 32kHz/16bit. That is not part of the DV spec, so it's possible ffmpeg is having trouble because of that. The spec states: 4 x 32kHz/12bit, or 2 x 48kHz/16bit, or alternately 2 x 44.1kHz/16bit.

However, I wouldn't be surprised if ffmpeg expects to expand 12bit->16bit (fits better byte-wise), and expects to only utilize 2 channels (at a time). It IS rare when the full 4 channels have been utilized in any workflow, and those workflows usually have involved major quality compromises.

Scott

[logicom]

I actually tough 4 channels at 32Khz 12 bits . Any suggestion how to copy or cut this file leaving the second stream alive ?