On Wed, Mar 23, 2005 at 10:17:18PM +0100, Gr?goire Favre wrote: > it's probably not a great idea to do the conversion in only one pass if > you want to keep a good quality... yep, that's my next step...to make it do a good quality two-pass transcoding. even with the default settings as in the script, the quality is reasonable. artifacts are only really noticable in graphics and lettering on signs etc. > You could for example have a look at : > > http://magma.epfl.ch/greg/scripts/MENCODER thanks. modifying my script to use the same two-pass technique, results in: note: untested, but if the original (yours?) works, this should work the same. ---cut here--- #! /bin/bash # vdr2dix.sh [dir] # # e.g. vdr2divx.sh /video/FooBar/2005-03-22.23.59.99.99.rec # will convert to divx & save as /video/DIVX/FooBar.2005.03.22.avi # user-tweakable constants OUTDIR='/video/DIVX' TMPDIR='/video/tmp' VBR=1000 # i don't use scaling, so don't have useful values for $C and $S # uncomment and provide good values if you want to scale. #C="" #S="" #SCALE="-vf crop=$C,scale=$S -sws 2" AUDIO="-oac copy" VIDEO="-ovc lavc -lavcopts vcodec=mpeg4:vbitrate=$VBR:trell:mv0:mbd=2:v4mv:qprd:cmp=10:subcmp=10:mbcmp=10:predia=2:dia=2" PASS1="$SCALE $AUDIO $VIDEO:vpass=1:turbo" PASS2="$SCALE $AUDIO $VIDEO:vpass=2:turbo" # arg processing IN="$1" show=$(echo "$IN" | sed -e 's=/video/==' -e 's=/.*==') date=$(echo "$IN" | sed -e 's=.*\([0-9][0-9][0-9][0-9]-[0-9][0-9]-[0-9][0-9]\).*=\1=') OUT="$OUTDIR/$show.$date.avi" #echo $IN "===>" $OUT cd $TMPDIR for f in vdrsync1.mpg frameno.avi divx2pass.log ; do [ -e $f ] && rm -f $f done vdrsync.pl $IN -mpeg2 -o $TMPDIR/ mencoder -ovc frameno -o frameno.avi -oac mp3lame -lameopts cbr:br=96 $TMPDIR/vdrsync1.mpg mencoder $PASS1 -o /dev/null $TMPDIR/vdrsync1.mpg mencoder $PASS2 -o $OUT $TMPDIR/vdrsync1.mpg rm -f frameno.avi divx2pass.log vdrsync1.mpg ---cut here--- (does "br=96" in lameopts give reasonable sound quality?) next on the TODO list: - make one-pass or two-pass selectable from command line, e.g. "-1" or "-2" (probably default to 2 pass) - allow overide of output filename (default to filename derived by sed) usage would then be: vdr2divx.sh [-1|-2] [-o filename] <dir> > BUT, I have learn something about sed with your script, thank you for > it !!! sed's a useful tool...but a bit "clumsier" to use than perl. i tend to use sh + sed + awk etc for small, simple scripts and for wrapper scripts that mostly call other programs to do the work, and perl for anything more complex. craig -- craig sanders <cas@xxxxxxxxxx> (part time cyborg)
