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By Steel_J at 2006-05-03 00:09
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A lot of users have TV shows captured as MPEG files on their systems or personal video recorder.
I built a PVR that record's the satellite with an hardware MPEG2 encoder PCI card. It's all fine when I want to watch the shows within the week but for those shows I want to keep for later I convert them to high quality AVI files and transfer them elsewhere. Otherwise MPEG files take a lot of disk space.
Here is a little script I wrote to batch convert all MPEG files within a folder to quality AVI videos.
The only requirement for the script is mplayer. You can modify the "vbitrate" variable yourselves. I set it to 1100 because it produces a 500-550MB files from a one hour tv show. I find this to be a reasonable ratio between size and quality.
Copy and paste this code to a text file and name it "mpg2avi". You can then copy this file to /USR/LOCAL/BIN. Set permissions like so as root in a console: "chmod +rx mpg2avi" (without the quotes).
You can then run this in console from any directory and it will convert all MPEG files in it.
code:
Code:
#!/bin/bash
#mpg2avi (Convert mpeg streams into high quality mpeg4 avi with mp3 audio)
#requirements: mplayer
#Begin
clear
# variables
version=0.2b
current_directory=$( pwd )
# video bitrate (1100 = around 500 MB movie size)
vbitrate=1100
echo -e "* mpg2avi v${version}"
# remove spaces
for i in *.[Mm][Pp][Gg]; do mv "$i" `echo $i | tr ' ' '_'`; done > /dev/null 2>&1 &
# remove uppercase
for i in *.[Mm][Pp][Gg]; do mv "$i" `echo $i | tr '[A-Z]' '[a-z]'`; done > /dev/null 2>&1 &
# convert mpg movies into avi's with mencoder
for i in *.[Mm][Pp][Gg]; do nice -n 10 mencoder $i -ovc lavc -lavcopts vcodec=mpeg4:vbitrate=$vbitrate:vhq:vqmin=2:vlelim=-4:vcelim=9:lumi_mask=0.05:dark_mask=0.01 -vf pp=md -vop scale=640:480, -oac lavc -lavcopts acodec=mp3:abitrate=128 -o "`basename "$i"`.avi";echo "Conversion done";done
exit;
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