[FFmpeg-devel] [PATCH] libvpx: add 2 pass setting mapping
Tue Jun 8 21:17:38 CEST 2010
On Tue, Jun 8, 2010 at 14:24, Jason Garrett-Glaser
<darkshikari at gmail.com> wrote:
> On Tue, Jun 8, 2010 at 11:09 AM, James Zern <jzern at google.com> wrote:
>> The attached adds a mapping for libvpx/rc_2pass* based on comments
>> from earlier thread "[PATCH] add encode options to libvpxenc"
>> regarding use of qcompress.
>> Descriptions of the libvpx settings:
>> ? ? ? ? * Bias, expressed on a scale of 0 to 100, for determining target size
>> ? ? ? ? * for the current frame. The value 0 indicates the optimal CBR mode
>> ? ? ? ? * value should be used. The value 100 indicates the optimal VBR mode
>> ? ? ? ? * value should be used. Values in between indicate which way the
>> ? ? ? ? * encoder should "lean."
>> ? ? ? ? rc_2pass_vbr_bias_pct
> This is *literally* qcomp: 0 is CBR, 1 is VBR, everything in between
> lies along the scale. ?Any particular reason it can't map to qcomp?
Thought I did.
+ //0-100 (0 => CBR, 100 => VBR)
+ enccfg.rc_2pass_vbr_bias_pct = round(avctx->qcompress * 100);
The above were descriptions of the libvpx values being mapped with
this patch, sorry for the confusion.
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