DVD Backup Script

Question

Holy trial and error batman!
ok, after weeks of banging my head against the wall i think i finally got this working.  so here it is, a script to rip - compress - and burn a DVD9 to standard 4.7 GB DVD5.
why? because lxdvd fails, dvd95 usually fails, and k9copy brings in unwanted dependencies and never remembers my settings between sessions.
i have not tested this extensively but i think it's workable enough to post for now, in it's current form.  take, enjoy, multiply and prosper.
Disclaimer 1: i'm not in any way condoning or encouraging copyright infringement
Disclaimer 2: if this script burns your house down (or anything else goes wrong) i accept no responsibility
one thing i would love to add is the ability to add chapter markers.  neither vobcopy -I or tcprobe give me the needed info to build a ch.lst.  so any suggestions on that would be appreciated.
here's the script:
#!/bin/bash
# DvdCopy V 0.1
# pbrisbin 2009
# Requires:
# bc
# transcode (tcprobe)
# vobcopy
# mplayer (mencoder)
# dvdauthor
# cdrkit or cdrtools (mkisofs and growisofs)
# sudoers ability to `sudo /usr/bin/eject` w/o password
### Editable User Settings
DEV="/dev/sr0"
WD="/home/patrick/Temp/ripping"
### Below this shouldn't need to edited unless
### you intend to adjust the behavior of the
### actual program
### Some set up
# Set up a working directory as defined above. we
# need ~10GB here to hold all the files needed to
# run this script as-is
[ -d $WD ] || mkdir $WD
### Find the Longest Title
# some dvd's need mencoder to call dvd://N where N is
# the title to copy. it should auto detect longest
# but we'll help it out by calling vobcopy -I to find
# it manually just in case
vobcopy -I $DEV 2>&1 | tee $WD/title.txt
TITLE=$(grep Most\ chapters $WD/title.txt | awk '{print $6}')
echo ""
echo -e "\n\n The longest title was Title \e[1;34m${TITLE}\e[0m. Proceed with this title? y/n " && read A
echo ""
[ "$A" = "y" ] || exit
### Gather INFO on the DVD
# tcprobe is annoying and always prints to screen
tcprobe -i $DEV -T $TITLE 2>&1 > $WD/probe.txt || exit
### Calculate the Video Bitrate
# an equation is used to calculate a vbitrate to
# keep the final .mpeg under the limit $S. $S is
# 4.3GB to allow some wiggle room. quality seems
# ok with this setting, change it if you want.
S="4300000"
L="$(grep ^V\: $WD/probe.txt | awk '{print $4}')"
a="$(grep ^A\: $WD/probe.txt | awk '{print $5}')"
A="$(echo "$a / 8" | bc)"
VBR="$(echo "( ( $S - ( $A * $L ) ) / $L ) * 8" | bc)"
echo ""
echo -e "Your calculated bitrate is: \e[1;34m${VBR}\e[0m"
echo ""
### Get the Chapter Listing
# use tcprobe with more verbosity to get the chapter
# listing, this is minipulated into a file that's
# called later by dvdauthor -c. we need to find a more
# elegant way to handle this failing, but then again
# i'm not sure how often it will fail, if ever
tcprobe -i $DEV -T $TITLE -d 8 2>&1 | egrep "\[Chapter ..\] " | cut -d " " -f 4 | \
perl -pi -e 's/\n/,/' | perl -pi -e 's/,$//' | tee $WD/ch.list || exit
echo -e "\n $(cat $WD/ch.list) \n"
echo ""
echo -e "\n\n Check the chapters, you should see 0,00:10:00.0,...\n\n Is it ok? y/n " && read A
echo ""
[ "$A" = "y" ] || exit # cop out!
### Finally, we can encode the Video
# these settings build an NTSC DVD compliant mpg with
# a straight copy of the audio and a vbitrate calculated
# to keep it under the 4.4 GB limit defined above
mencoder dvd://${TITLE} -dvd-device $DEV -ovc lavc -of mpeg -mpegopts format=dvd:tsaf \
-vf scale=720:480,harddup \
-lavcopts vcodec=mpeg2video:vrc_buf_size=1835:vrc_maxrate=9800:vbitrate=${VBR}:\
keyint=18:vstrict=0:aspect=16/9 -ofps 30000/1001 \
-oac copy \
-o $WD/file.mpeg || exit 1
### Author the DVD folder
# we need to set it up such that if the ch.list fails
# then we can choose to do an interval - chapters each
# 10 15 minutes or something, dynamically set up a file
# then conditionally call -c ch.list or -c fallback.list
if [ -f $WD/ch.list ]; then
dvdauthor -t -c $(cat $WD/ch.list) -o $WD/MOVIE $WD/file.mpeg || exit 2
else
dvdauthor -t -o $WD/MOVIE $WD/file.mpeg || exit 2
fi
# TOC is required so it's playable in standard players
dvdauthor -T -o $WD/MOVIE || exit 2
### Build the ISO image
# this is done so that the .iso can be saved or burnt
# to disc in the next step
mkisofs -dvd-video -o $WD/movie.iso $WD/MOVIE || exit 3
# prepare to burn, eject the disc and ask for a blank
# one. sudoers file needs to be edited to allow access
# to this command w/o a password
sudo /usr/bin/eject $DEV || exit 4
read -p "Please insert a blank DVD-R and press any key to continue:"
### Burn the ISO image
# wait 5 seconds for the drive to settle then burn the
# iso to disk. this line can cab used directly on the
# $WD/MOVIE folder if you're never going to keep the
# ISO image file on disk
sleep 5 && growisofs -dvd-compat -Z $DEV=$WD/movie.iso || exit 5
# Now that we're done let's clean up the Temp data
# the user is asked b/c we might want to keep the .iso
echo -e "\n\n Seems we're all set. Would you like to remove the Temp data? y/n\n" && read A
[ "$A" = "y" ] && rm -r $WD
echo -e "Enjoy your movie!"
exit 0
edit1: almost forgot, i call eject in the script which requires root privileges on my system.  do the usual `sudo visudo` routine so you can do that w/o password or the script will choke at that point.  alternatively you can put an exit right there and just eject/burn manually from there.
edit2: in the script i run mkisofs to make the .iso, then i burn that with growisofs.  i do this because occasionally i like to keep the .iso on my HDD for a while.  if this isn't needed, you can run this to burn directly from $WD/MOVIE to disc:
growisofs -dvd-compat -Z $DEV -dvd-video $WD/MOVIE/
edit3: figured out the chapters listing... added to script
edit4: thanks skottish... this _should_ work.  testers welcome
edit5: 'final' version posted, dependencies listed.  enjoy!
edit6: just a cleaner and more commented version.  no major changes
edit7: moved the title finding section to the top so i could then us $TITLE everywhere to be safe
Last edited by brisbin33 (2009-03-27 21:27:35)

Answer 1

OK, for the sake of completeness, here's the final version i've been using successfully of late.  the only thing i might add is some better error handling.  thanks juster for the fixes, i love hiding output in scripts and was very annoyed that tcprobe/vobcopy wasn't behaving.  hope this works for you, suggestions always welcome
#!/bin/bash
# DvdCopy V 0.1
# pbrisbin 2009
# Requires:
# bc
# transcode (tcprobe)
# vobcopy
# mplayer (mencoder)
# dvdauthor
# cdrkit or cdrtools (mkisofs and growisofs)
# sudoers ability to `sudo /usr/bin/eject` w/o password
### Editable User Settings
DEV="/dev/sr0"
WD="$HOME/Temp/ripping"
### Below this, shouldn't need to edited unless
### you intend to adjust the behavior of the
### actual program
### Some set up
# Set up a working directory as defined above. we
# need ~10GB here to hold all the files needed to
# run this script as-is
[ -d $WD ] || mkdir -p $WD
### Find the Longest Title
# some dvd's need mencoder to call dvd://N where N is
# the title to copy. it should auto detect longest
# but we'll help it out by calling vobcopy -I to find
# it manually just in case
vobcopy -I $DEV > $WD/title.txt 2>&1 || exit
TITLE=$(grep Most\ chapters $WD/title.txt | awk '{print $6}')
echo ""
echo -e "\n\n The longest title was Title \e[1;34m${TITLE}\e[0m. Proceed with this title? y/n " && read A
echo ""
[ "$A" = "y" ] || exit
### Gather INFO on the DVD
# tcprobe is annoying and always prints to screen
tcprobe -i $DEV -T $TITLE -d 8 > $WD/probe.txt 2>&1 || exit
### Calculate the Video Bitrate
# an equation is used to calculate a vbitrate to
# keep the final .mpeg under the limit $S. $S is
# 4.3GB to allow some wiggle room. quality seems
# ok with this setting, change it if you want.
S="4300000"
L="$(grep ^V\: $WD/probe.txt | awk '{print $4}')"
a="$(grep ^A\: $WD/probe.txt | awk '{print $5}')"
A="$(echo "$a / 8" | bc)"
VBR="$(echo "( ( $S - ( $A * $L ) ) / $L ) * 8" | bc)"
echo ""
echo -e "\n Your calculated bitrate is: \e[1;34m${VBR}\e[0m"
echo ""
### Get the Chapter Listing
# using that first tcprobe (-d 8) to get the chapter
# listing, this is minipulated into a file that's
# called later by dvdauthor -c. we need to find a more
# elegant way to handle this failing, but then again
# i'm not sure how often it will fail, if ever...
egrep "\[Chapter ..\] " $WD/probe.txt | cut -d " " -f 4 | \
perl -pi -e 's/\n/,/' | perl -pi -e 's/,$//' > $WD/ch.list || exit
### Display the Chapter
# let's display the chapters in a more readable format
# do the reverse of above, we'll be confident the file's
# ok if the listing look's good
echo -e "\n Your Chapters were determined as follows: \n"
count=1
cat $WD/ch.list | sed 's/\,/\n/g' | while read chap; do
echo -e "\tChapter $count \t- \e[1;34m$chap\e[0m"
count=$(( count + 1 ))
done
echo ""
echo -e "\n Chapters look ok? y/n " && read A
echo ""
[ "$A" = "y" ] || exit # cop out!
### Finally, we can encode the Video
# these settings build an NTSC DVD compliant mpg with
# a straight copy of the audio and a vbitrate calculated
# to keep it under the 4.4 GB limit defined above
mencoder dvd://${TITLE} -dvd-device $DEV -ovc lavc -of mpeg -mpegopts format=dvd:tsaf \
-vf scale=720:480,harddup \
-lavcopts vcodec=mpeg2video:vrc_buf_size=1835:vrc_maxrate=9800:vbitrate=${VBR}:\
keyint=18:vstrict=0:aspect=16/9 -ofps 30000/1001 \
-oac copy \
-o $WD/file.mpeg || exit 1
### Author the DVD folder
# we need to set it up such that if the ch.list fails
# then we can choose to do an interval - chapters each
# 10 15 minutes or something, dynamically set up a file
# then conditionally call -c ch.list or -c fallback.list
if [ -f $WD/ch.list ]; then
dvdauthor -t -c $(cat $WD/ch.list) -o $WD/MOVIE $WD/file.mpeg || exit 2
else
dvdauthor -t -o $WD/MOVIE $WD/file.mpeg || exit 2
fi
# TOC is required so it's playable in standard players
dvdauthor -T -o $WD/MOVIE || exit 2
### Build the ISO image
# this is done so that the .iso can be saved or burnt
# to disc in the next step
mkisofs -dvd-video -o $WD/movie.iso $WD/MOVIE || exit 3
# prepare to burn, eject the disc and ask for a blank
# one. sudoers file needs to be edited to allow access
# to this command w/o a password
sudo /usr/bin/eject $DEV || exit 4
read -p " Please insert a blank DVD-R and press any key to continue:"
### Burn the ISO image
# wait 5 seconds for the drive to settle then burn the
# iso to disk. this line can cab used directly on the
# $WD/MOVIE folder if you're never going to keep the
# ISO image file on disk
sleep 5 && growisofs -dvd-compat -Z $DEV=$WD/movie.iso || exit 5
# Now that we're done let's clean up the Temp data
# the user is asked b/c we might want to keep the .iso
echo -e "\n\n Seems we're all set. Would you like to remove the Temp data? y/n\n" && read A
[ "$A" = "y" ] && rm -r $WD
echo -e "\n\n Enjoy your movie!"
exit 0