[MPlayer-users] Creating a letterbox (PAL) VCD
Colin Rosenthal
csr at statsbiblioteket.dk
Thu Aug 30 14:38:18 CEST 2007
RC wrote:
> On Thu, 30 Aug 2007 11:02:10 +0200
> Colin Rosenthal <csr at statsbiblioteket.dk> wrote:
>
>
>> vcodec=mpeg1video:keyint=15:vrc_buf_size=327:vrc_minrate=1150:\
>> vbitrate=1150:vrc_maxrate=1150:acodec=mp2:abitrate=224:aspect=4/3
>>
>
> No options? You're just asking for horrible video quality.
>
> This is all extensive covered in the docs.
>
>
Well quite. The problem is that it is so extensively covered in the docs
that it's rather hard to know which of the many filter options,
for example, might make a significant difference. For example, we tried
the following two-pass encoding:
FILTER="pp=hb/vb/dr/al/fd"
mencoder -oac twolame -twolameopts br=224 -ovc lavc -of mpeg -mpegopts
format=xvcd -vf \
scale=352:198,expand=352:288:0:45,$FILTER,harddup -srate 44100 -af
lavcresample=44100 -lavcopts \
vcodec=mpeg1video:keyint=15:vrc_buf_size=327:vrc_minrate=1150:\
vbitrate=1150:vrc_maxrate=1150:acodec=mp2:abitrate=224:aspect=4/3:vpass=1
-ofps 25 \
-o /dev/null 070507_1210.wmv
mencoder -oac twolame -twolameopts br=224 -ovc lavc -of mpeg -mpegopts
format=xvcd -vf \
scale=352:198,expand=352:288:0:45,$FILTER,harddup -srate 44100 -af
lavcresample=44100 -lavcopts \
vcodec=mpeg1video:keyint=15:vrc_buf_size=327:vrc_minrate=1150:\
vbitrate=1150:vrc_maxrate=1150:acodec=mp2:abitrate=224:aspect=4/3:vpass=2
-ofps 25 \
-o two_pass_filtered.mpeg 070507_1210.wmv
but really couldn't see any improvement.
--
Dr. Colin Rosenthal MSc-IT
IT-Developer, Digital Resources
Statsbiblioteket tlf: 89462074
DK 8000 Århus C
More information about the MPlayer-users
mailing list