Summary: | >media-video/x264-svn-encoder-20061014 fails to convert video file using mencoder | ||
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Product: | Gentoo Linux | Reporter: | Alexey <lefsha> |
Component: | Current packages | Assignee: | Gentoo Media-video project <media-video> |
Status: | RESOLVED INVALID | ||
Severity: | normal | ||
Priority: | High | ||
Version: | unspecified | ||
Hardware: | x86 | ||
OS: | Linux | ||
Whiteboard: | |||
Package list: | Runtime testing required: | --- |
Description
Alexey
2007-10-13 13:33:12 UTC
My bad. I'm talking about media-libs/x264-svn !!! The last working version is x264-svn-20061014-r1 (In reply to comment #0) > x264 [error]: no ratecontrol method specified you need to specify it... from man mplayer: qp=<0-51> This selects the quantizer to use for P-frames. I- and B-frames are offset from this value by ip_factor and pb_factor, respective- ly. 20-40 is a useful range. Lower values result in better fi- delity, but higher bitrates. 0 is lossless. Note that quantiza- tion in H.264 works differently from MPEG-1/2/4: H.264's quantiza- tion parameter (QP) is on a logarithmic scale. The mapping is ap- proximately H264QP = 12 + 6*log2(MPEGQP). For example, MPEG at QP=2 is equivalent to H.264 at QP=18. x264 used to default to 26 iirc, that's no longer the case if you wish mplayer to restore the default, please ask that upstream. |