[x264-devel] Degrade video quality by time

[Jason Garrett-Glaser]

On Wed, Oct 26, 2011 at 8:11 PM, Alex Jurkiewicz <alex at jurkiewi.cz> wrote:
> You must specify a bufsize for VBV encoding to work. More info:
> http://mewiki.project357.com/wiki/X264_Encoding_Suggestions#VBV_Encoding
>
> Single pass bitrate-based ratecontrol doesn't work so well, because
> the ratecontrol algorithm has no information about the complexity of
> future scenes. It often overallocates bits at the start and has to
> underallocate later on.

Only for ABR, not CBR.

Jason