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

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
View File

@ -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++){

14
tests/ffmpeg.regression.ref
View File

@ -59,18 +59,18 @@ stddev: 7.99 PSNR:30.06 bytes:7602176
7932708 ./data/a-huffyuv.avi
799d3db687f6cdd7a837ec156efc171f *./data/out.yuv
stddev: 0.00 PSNR:99.99 bytes:7602176
24f8d8a1c15c078f1f1e443b85688444 *./data/a-mpeg4-rc.avi
820964 ./data/a-mpeg4-rc.avi
8458b4ddaca643a3ec1264c1ee2f4986 *./data/out.yuv
fc4c71c330fd3f95e05c398c6a7584de *./data/a-mpeg4-rc.avi
824306 ./data/a-mpeg4-rc.avi
fb0a9af6dd83b2f1a3ba752b848038f7 *./data/out.yuv
stddev: 10.41 PSNR:27.77 bytes:7602176
81078d7852dfd6041ff17b5dc8ed0ffc *./data/a-mpeg4-adv.avi
600240 ./data/a-mpeg4-adv.avi
0b7935cee2070f3b838478cea6dc4b3c *./data/out.yuv
stddev: 10.25 PSNR:27.90 bytes:7602176
c5478162c76db62162b082594c4e7ee1 *./data/a-mpeg4-thread.avi
756550 ./data/a-mpeg4-thread.avi
7e4e2cf2659aa158f5ffed2be45a9c3d *./data/out.yuv
stddev: 12.31 PSNR:26.31 bytes:7602176
5da70c628af00fc6d2dba685d24341b6 *./data/a-mpeg4-thread.avi
764920 ./data/a-mpeg4-thread.avi
6e3cc8569fd1f39a3657045a8249dbc6 *./data/out.yuv
stddev: 12.32 PSNR:26.30 bytes:7602176
50867a2530035615152f1e068c989bfc *./data/a-mpeg4-Q.avi
899514 ./data/a-mpeg4-Q.avi
cdb77818e108eab89c9ac4bcaf350e19 *./data/out.yuv

14
tests/rotozoom.regression.ref
View File

@ -59,18 +59,18 @@ stddev: 5.34 PSNR:33.56 bytes:7602176
6454196 ./data/a-huffyuv.avi
dde5895817ad9d219f79a52d0bdfb001 *./data/out.yuv
stddev: 0.00 PSNR:99.99 bytes:7602176
540bdc49a339db675d12cffc9fce2454 *./data/a-mpeg4-rc.avi
228094 ./data/a-mpeg4-rc.avi
764d5da4f1c8eda9bd554179ed1ea283 *./data/out.yuv
95e95dfe42fce9cdbe72688e821022ca *./data/a-mpeg4-rc.avi
227834 ./data/a-mpeg4-rc.avi
2e02fa0261c21268d568ddde74f9431e *./data/out.yuv
stddev: 4.26 PSNR:35.51 bytes:7602176
6844785bcca74b4b9dc77ce6d21a3871 *./data/a-mpeg4-adv.avi
172538 ./data/a-mpeg4-adv.avi
49fecc1105d25ff1c2fc9c0d4cb821b0 *./data/out.yuv
stddev: 4.84 PSNR:34.41 bytes:7602176
d5f2da1edcf1979d71bec183e461b5aa *./data/a-mpeg4-thread.avi
253098 ./data/a-mpeg4-thread.avi
da1a5a3301ad2bdf5806a51ffa74d4fb *./data/out.yuv
stddev: 4.06 PSNR:35.93 bytes:7602176
9f7f5a7da720ba720aa35d72ed062959 *./data/a-mpeg4-thread.avi
253448 ./data/a-mpeg4-thread.avi
672eff5de3b19df7b82ed3e6bed8642d *./data/out.yuv
stddev: 4.05 PSNR:35.96 bytes:7602176
ddcb9476113fac71ee609018984353ce *./data/a-mpeg4-Q.avi
165016 ./data/a-mpeg4-Q.avi
94d8bd3897ac20bb3bef9cf384f9abd0 *./data/out.yuv