[MPlayer-dev-eng] mencoder problem

[Bohdan Horst]

some mencoder tests:

file: matrixbench_highdivx_ac3.avi from mphq

audio options:
-lameopts abr:br=64

video options:
-lavcopts vcodec=mpeg4:vhq:vbitrate=*:keyint=1000 -vop scale=352:144,crop=720:296


tested vbitrates:


1024(+64A):

10799964 17 Maj 12:01 1024_S.avi	447.3 kbps (54.6 kbyte/s)
 7699938 17 Maj 12:05 1024_SB.avi	315.1 kbps (38.5 kbyte/s)

26563422 17 Maj 11:52 1024_P.avi	1119.5 kbps (136.7 kbyte/s)
10799532 17 Maj 11:44 1024_V.avi	447.3 kbps (54.6 kbyte/s)
 7699506 17 Maj 11:40 1024_VB.avi	315.1 kbps (38.5 kbyte/s)


512(+64A):

10799964 17 Maj 12:13 512_S.avi		447.3 kbps (54.6 kbyte/s) 
 7699938 17 Maj 12:09 512_SB.avi	315.1 kbps (38.5 kbyte/s)

14182498 17 Maj 11:12 512_P.avi		591.6 kbps (72.2 kbyte/s)
10799532 17 Maj 11:05 512_V.avi		447.3 kbps (54.6 kbyte/s)
 7699506 17 Maj 11:14 512_VB.avi	315.1 kbps (38.5 kbyte/s)


256(+64A):

 7552082 17 Maj 12:17 256_S.avi		308.8 kbps (37.7 kbyte/s)
 6938302 17 Maj 12:22 256_SB.avi	282.6 kbps (34.5 kbyte/s)

 7552800 17 Maj 11:20 256_P.avi		308.8 kbps (37.7 kbyte/s)
 7767832 17 Maj 11:28 256_V.avi		318.0 kbps (38.8 kbyte/s)
 7690216 17 Maj 11:33 256_VB.avi	314.7 kbps (38.4 kbyte/s)


Legend:
P  == with "-pass 1/2"
V  == with "-vpass 1/2"
VB == V + vmax_b_frames=4
S  == single
SB == S + vmax_b_frames=4



in all tests only -pass 1/2 give works as expected ..

-vpass 1 and -vpass 2  generate same files (diff show no differences)

1024_S  == 512_S
1024_SB == 512_SB
1024_V  == 512_V
1024_VB == 512_VB



Am I doing smth in wrong way ? (big keyint shouldn't generate such
differences)


best regards


-- 
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