[x264-devel] Levels

Loren Merritt lorenm at u.washington.edu
Sun Jan 6 03:37:15 CET 2008


On Sat, 5 Jan 2008, Måns Rullgård wrote:
>
> How are bitrate restrictions handled now when a profile/level is
> explicitly specified?

If you specify a level and enable VBV ratecontrol, x264 will warn 
immediately if your requested VBV doesn't fit in your requested level. 
x264 will also warn during the encode if it failed to respect your 
requested VBV. It doesn't compare actual bitrate to the level's max VBV if 
that differs from your requested VBV.
If you specify a level but don't enable VBV ratecontrol, x264 doesn't 
check whether the level's implied VBV was respected.

--Loren Merritt


More information about the x264-devel mailing list