[x264-devel] Cycles for X264

[Jason Garrett-Glaser]

On Tue, Jun 8, 2010 at 12:00 PM, Zubair Ali Khan <zkhan at d2tech.com> wrote:
> Thanks Jason
> Ultrafast gets about 3x improvement over fast. What are the trade offs. I
> guess video quality right?
> Zubair

Compression, meaning worse quality at a given bitrate or worse bitrate
at a given quality.

If you use constant QP ratecontrol instead of bitrate mode and set a
sane QP (e.g. "25"), you'll get even higher performance because x264
will be able to disable the lookahead.

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