[FFmpeg-user] LLossless (10 Bit RGB 444) and (10 Bit YUV 422) Compression

Carl Eugen Hoyos cehoyos at ag.or.at
Wed Dec 31 00:52:40 CET 2014

Jason Freets <jasonslife <at> hotmail.com> writes:

> ffmpeg -f lavfi -i testsrc -t 10 -vcodec r10k out.avi
> Yes, this does work. It creates a R10K (Big Edian) 
> video file. The R10K (Big Edian) video file does play.

With FFplay? Or did you test another application?

> Since the "-vcodec r10k" is a little 'r' I was 
> expecting a "r10k" (Little Endian) video file.

Nearly all users would find it extremely annoying if 
this command line would suddenly produce different 

> > > So the question I have is if there will be a fix 
> > > put in place to have FFmpeg write r10k (Little 
> > > Endian)? Too hard to do? Or?
> > 
> > Useless?
> > Or don't you agree?
> No, it would not be useless for me. I have a lot of 
> r10k (Little Endian) video files. I suppose it's a 
> "nice" to have. It would make things consistent that 
> FFmpeg can Input and Ouput both R10k and r10k. I 
> then have a way to convert from r10k to FFV1 and back 
> to the original r10k when needed.

Why can't you simply convert to R10k?
Or do you mean the file above does not play with 
applications that are not FFmpeg-based? In this 
case, I would like to find out why.

Carl Eugen

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