[FFmpeg-devel] [libav-devel] [RFC] M-bit to N-bit YUV conversions

madshi madshi at gmail.com
Thu Aug 25 22:59:32 CEST 2011

2011/8/25 Michael Niedermayer <michaelni at gmx.at>
> true, i had somehow missed that the low frequency can be
> made more fine grained and accurate at the cost of poorer
> accuracy at the high frequency.
> I agree this likely is the ideal solution from a psychovissual
> point of view

Of course this comes at the cost of slower performance and lower compression
efficiency, though. So it might make sense to offer 2 different algorithms.
Maybe one with simple << 2 shifting for best speed and compression
efficiency, and the other one with dithering for best quality.

> fixed in ffmpegs swscale :)
> took less time than the reg tests


Best regards, Mathias.

More information about the ffmpeg-devel mailing list