[FFmpeg-devel] [PATCH] libvpx: add 2 pass setting mapping

James Zern jzern
Mon Jul 12 22:32:55 CEST 2010


On Tue, Jun 8, 2010 at 14:09, 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 value, expressed as a percentage of the target
> bitrate, indicates
> ? ? ? ? * the minimum bitrate to be used for a single GOP (aka "section")
> ? ? ? ? rc_2pass_vbr_minsection_pct
>
> ? ? ? ? * This value, expressed as a percentage of the target
> bitrate, indicates
> ? ? ? ? * the maximum bitrate to be used for a single GOP (aka "section")
> ? ? ? ? rc_2pass_vbr_maxsection_pct
>

Any reason to keep these back?



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