I've sent this to mjpeg-users and transcode-users, my apologies to those who are on both.
I've tried to make reduced-rate backups of DVDs using this script:
#!/bin/sh
#
device=/dev/cdroms/cdrom0
title=4
chapter=-1
factor=1.20
#
rm -f movie.m2v
rm -f movie.ac3
#
tcextract -i fifo.vid -t vob -x mpeg2 -a 0xe0 | \
tcextract -t raw -x mpeg2 | \
tcrequant -f $factor > movie.m2v &
tcextract -i fifo.aud -t vob -x ac3 -a 0 | \
tcextract -t raw -x ac3 > movie.ac3 &
tccat -i $device -T $title,$chapter -t dvd | tee fifo.aud fifo.vid > /dev/null
#
rm -f movie.mpg
mplex -f 8 -V -o movie.mpg movie.m2v movie.ac3
(then using dvdauthor etc etc) but there seems to be a problem which I
think might be caused by the final mpeg file being over 4 Gb. I fiddle with the tcrequant factor to get it a near as possible to 4.5 Gb. However I have problems playing. I even tried playing the .mpg (using PowerDVD on a Windows box) and it hammered the disk for about 5 mins before play started then the progress bar suggested the movie was only a few minutes long, wierd.
Do I need to keep the output size below 4Gb, ie is there some architectural issue in the MPEG-PS file format which requires that?
jim
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