[Matroska-devel] Re: Status Quo of new features

Steve Lhomme steve.lhomme at free.fr
Mon Dec 27 12:23:34 CET 2004


Paul Bryson a écrit :
> "Steve Lhomme" wrote...
> 
>>>- DV ( camcorder, lossy compression ) support, type 1 ( a +v = 1 stream ) 
>>>and 2 ( a , a+v : 2 streams ); mainly some AVI parsing and defining how 
>>>to handle the embedded audio stream ( AVI has to repeat the PCM WAV audio 
>>>stream --> ENORMOUS overhead )
>>
>>As I've worked on MTX a bit, I think I could be able to add DV support 
>>too. Actually we would store the audio and video in separate tracks, not 
>>using the complex type, since the DV format is known we can demux it.
> 
> 
> DV is strange because if you encode only video to DV, it still uses the same 
> space for the PCM, but it marks it as no audio.  It would be possible to 
> store just the video frame data, but the splitter would need to recreate 
> Video + Null Audio stream on playback for anything to be able to use it.  If 
> I recall correctly, it basically uses something like JPEG images for the 
> video, very similar to MJPEG video.  I know we all have visions of using DV 
> video with Wavpack audio without having to store all of that silly PCM 
> overhead.

As long as all data needed to reconstruct the video is present in 
Matroska, that's fine.




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