[FFmpeg-user] Encode lossless Dirac?

Peter B. pb at das-werkstatt.com
Mon Nov 21 18:55:06 CET 2011

Carl Eugen Hoyos wrote:
> 255 requests maximum compression (worst quality), does 0 work?
No, because when trying "0" it says:

qscale must be > 0.0 and <= 255

Which is why I've tried a value < 1.0, hoping that if it's smaller than
1, it enables lossless ;)

I must admit, I could take a peek at the code to see how qfactor is
handled, but I was hoping that, since Dirac could be used by others out
there, someone could give me an example of how to do it.
Or is there any documentation for Dirac's codec parameters, which I just
couldn't find?


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