[Ffmpeg-devel] Re: [PATCH] DVCPRO50 support
Fri Mar 3 22:17:36 CET 2006
On Fri, Mar 03, 2006 at 04:08:56PM -0500, Dan Maas wrote:
> > Now, DVCPRO 100 is, in fact a different CODEC regardless of the name
> > being similar to the DVCPRO 50.
> Not really. If I implement DV100 I will do it just like DV50. It will
> just need a separate version of dv_set_class_number() and
> dv_guess_qnos(). All the rest is identical to DV25/DV50. (blocking, AC
> encoding, audio, muxing, etc).
Really ? I though that the spec required different quantization (JPEG-like)
and different bit distribution techniques to be used.
I guess the criteria I've been using for distinguishing between a DV
CODEC and just a DV CODEC variation is: whether you have to make non trivial
changes bellow dv_decode_video_segmet/dv_encode_video_segmet level.
The impression I got from your thorough assessment of DV100 back
in December was that such non trivial changes would be required.
Could you, clarify a bit, please ?
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