Audio file format with time code

[Nicolas Dufresne]

Le mardi 15 juillet 2014 à 22:35 +0200, Dr. Peter G. Baum a écrit :
> Thanks, Nicolas, for the quick answer.
> 
> Has a channel to be bound to a position? I don't need a position.
> But I need the time code to merge the audio later with the corresponding 
> video.

If you want to play it, yes.

> 
> Any audio file format supporting time code?

Any containers that supports raw audio. A container is something like
qicktime (mov), matroska (mkv), Transport Stream (TS), etc. Wav isn't
really a container, but wavdec will create valid timestamp from data
offset.

Nicolas

> 
> Peter
> 
> 
> 
> On 07/15/2014 10:30 PM, Nicolas Dufresne wrote:
> > Le mardi 15 juillet 2014 à 21:49 +0200, Dr. Peter G. Baum a écrit :
> >> Hi,
> >>
> >> Which file format implemented in gstreamer supports up to 40 channels
> >> PCM samples with time code?
> >
> > I doubt any standard allow that, at least it would not be playable in
> > Gstreamer. We have 28 channel positions defined so far, see
> > GstAudioChannelPosition. It would not be possible to create a layout for
> > that. Though, in term of raw PCM I think it could work. Timecode isn't
> > mandatory for raw audio, as the sample length is fixes, we can
> > figure-out when to play it. Note that our theoretical limit is 64 (with
> > layout).
> >
> >>
> >> wavenc supports only 2 channels (why only 2, the NumChannels field is 16
> >> bit?) and does not support the broadcast wave chunk, which would add the
> >> time code.
> >
> > There is a comment in the code,
> > "gst-plugins-good/gst/waveenc/gstwaveenc.c"
> >
> > /* Max. of two channels, more channels need WAVFORMATEX with
> >   * channel layout, which we do not support yet */
> >
> > Feel free to propose a patch. I suppose we could cheat and allow more
> > channels without exposing a layout. It would just not play on any audio
> > sink unless you do the merging yourself.
> >
> > cheers,
> > Nicolas
> >
> >
> >
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> >
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