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improved lambda/qp guessing for motion estimation RD in first pass

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this only affects encoding with bframes and rate control

Originally committed as revision 4765 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer
2005-12-22 14:17:54 +00:00
parent bb270c0896
commit 50c6f6cd4c
3 changed files with 22 additions and 14 deletions
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8
libavcodec/mpegvideo.c
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@@ -5300,7 +5300,15 @@ static void encode_picture(MpegEncContext *s, int picture_number)
if(s->flags & CODEC_FLAG_PASS2)
estimate_qp(s, 1);
else if(!(s->flags & CODEC_FLAG_QSCALE)){
RateControlContext *rcc= &s->rc_context;
if(s->pict_type==B_TYPE)
s->lambda= rcc->last_qscale_for[s->pict_type];
else
s->lambda= rcc->last_qscale_for[rcc->last_non_b_pict_type];
update_qscale(s);
}
s->mb_intra=0; //for the rate distortion & bit compare functions
for(i=1; i<s->avctx->thread_count; i++){