[Ffmpeg-devel] Re: [PATCH] DVCPRO50 support

Måns Rullgård mru
Fri Mar 3 22:21:00 CET 2006

Roman Shaposhnick <rvs at sun.com> writes:

> On Fri, Mar 03, 2006 at 11:40:08AM +0100, Baptiste COUDURIER wrote:
>> Mans Rullgard wrote:
>> > Baptiste COUDURIER said:
>> They do not share parameters (different bitrates, different pixel
>> formats) and in `industry` (ISO, MPEG, SMPTE) that means oftenly
>> different specifications (for DV it IS the case), thats why they do have
>> different names. 
>   Just to make it clear -- I don't care how industry names things,
>   but the fact that these 3 flavors of DV have the same picture encoding
>   algorithms with small amount of knobs designed to address bitstream
>   constraints and differences in sampling -- make them all just a DV
>   codec in my book. Now, I do understand the convenience factor of having 
>   them as separate codecs -- but lets not be confused by the ffmpeg's
>   current restrictions.

In that case, using separate codec IDs would be like using separate
codec IDs for main profile and high profile MPEG2.  Nobody does that.

>   Now, DVCPRO 100 is, in fact a different CODEC regardless of the name
>   being similar to the DVCPRO 50.

Sort of like MPEG4 isn't all that much like MPEG2, and MPEG4 AVC is
yet another animal?

M?ns Rullg?rd
mru at inprovide.com

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