[FFmpeg-user] Near lossless encoding is it even possible?

David Klasinc bigwhale at lubica.net
Tue Dec 27 12:56:59 CET 2011

On 12/27/2011 12:37 PM, Nicolas George wrote:

> The pixel format yuv420p subsamples the chrominance channels at half the
> resolution. You need to use another pixel format. When you used hufyuv, the
> encoding was done in RGB, without subsampling, but the playback was
> converted to yuv420 by mplayer to use the Xv driver.
> When using x264, you can not use RGB, you need to explicitly use a pixel
> format that does not subsamples. I believe it is called something like
> yuv444, although the exact meaning of each digit still baffles me.

Thanks for the input. I was just about to reply that I discovered
subsampling problem with a little help of a friend. I tried yuv444p,
yuv440p and a few others and it didn't really help.

Thanks for the info, at least now I know it is not me who is doing
something wrong. :)


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