[FFmpeg-devel] clarification on General Description for FFV1 Draft Specification

Carl Eugen Hoyos cehoyos at ag.or.at
Thu Dec 31 17:50:42 CET 2015

Dave Rice <dave <at> dericed.com> writes:

> Re: "Each frame is split in 1 to 4 planes". I'd like to be 
> more specific. From this reading it seems like 2 planes is 
> possible; however, are 2 plane encodings possible 
> (grayscale with alpha or Y with only Cb)?

GRAY8A and GRAY16A are possible, both have two planes-

> Re: "since it is most likely that the RCT will immediately 
> be converted to RGB during decoding”. Is there anyone 
> other conversion possible?

I may misunderstand but I think it is possible to watch RCT 
data as if it were YUV (for example for debugging purpose).

Carl Eugen

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