> From: Matto Marjanovic <[EMAIL PROTECTED]>
> yuvscaler, but, yes, it also seems to do be able to do a better job
> of downscaling --- i.e. less junk in the high-frequency bands. I'd
> be curious to see the results of an independent real-life comparison
> of MPEG encoding bit usage using the output of each.)
You rang? ;)
14000 frames (~8 minutes) of data captured (by another Canopus convert)
from a VHS tape and on its way to SVCD.
1)
smil2yuv -a $N.wav $N.smil | \
y4mshift -n -6 | \
yuvdenoise -S 0 -r 16 -t 5 -l 3 -b 20,56,680,376 | \
yuvscaler -M BICUBIC -O SVCD | \
mpeg2enc -M 2 -f 4 -q 8 -4 2 -2 1 -N -o $N.m2v
and
2)
smil2yuv -a $N.wav $N.smil | \
y4mshift -n -6 | \
yuvdenoise -S 0 -r 16 -t 5 -l 3 -b 20,56,680,376 | \
y4mscaler -S option=cubic -O preset=svcd | \
mpeg2enc -M 2 -f 4 -q 8 -4 2 -2 1 -N -o $N.m2v
were the two commands run.
The mplex summary for 1)
INFO: [mplex] VIDEO_STATISTICS: e0
INFO: [mplex] Video Stream length: 134799910 bytes
INFO: [mplex] Sequence headers: 948
INFO: [mplex] Sequence ends : 1
INFO: [mplex] No. Pictures : 13999
INFO: [mplex] No. Groups : 948
INFO: [mplex] No. I Frames : 948 avg. size 19538 bytes
INFO: [mplex] No. P Frames : 3736 avg. size 10358 bytes
INFO: [mplex] No. B Frames : 9316 avg. size 8327 bytes
INFO: [mplex] Average bit-rate : 2308400 bits/sec
INFO: [mplex] Peak bit-rate : 3066800 bits/sec
and for 2)
INFO: [mplex] VIDEO_STATISTICS: e0
INFO: [mplex] Video Stream length: 132382127 bytes
INFO: [mplex] Sequence headers: 948
INFO: [mplex] Sequence ends : 1
INFO: [mplex] No. Pictures : 13999
INFO: [mplex] No. Groups : 948
INFO: [mplex] No. I Frames : 948 avg. size 19083 bytes
INFO: [mplex] No. P Frames : 3736 avg. size 10189 bytes
INFO: [mplex] No. B Frames : 9316 avg. size 8181 bytes
INFO: [mplex] Average bit-rate : 2267200 bits/sec
INFO: [mplex] Peak bit-rate : 2959200 bits/sec
The two .mpg files:
-rw-rw-r-- 1 sms wse 144355260 Dec 30 18:55 chicken-y4mscaler.mpg
-rw-rw-r-- 1 sms wse 146821024 Dec 30 16:45 chicken-yuvscaler.mpg
Not bad at all!
Cheers,
Steven Schultz
[EMAIL PROTECTED]
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