[SOLVED] dd of a DVD fails unless I first view it with VLC

Nutria · 04-21-2013, 09:37 PM

Hi,

When I buy a DVD, I immediately rip it to an ISO, then transcode the movie or episodes because that's faster than having HandBrake read directly from DVD.

The problem is that dd quickly barfs with an IO error when reading protected DVDs except when I first view (even for just a few seconds) the DVD with vlc. Then dd works perfectly. Presumably this has something to do with reading the CSS keys.

So, does anyone know of a CLI tool that will read the CSS keys and place the results in ~/dvdcss ?

Thanks.

ozanbaba · 04-22-2013, 01:13 AM

how about cvlc? It's CLI to vlc.

Nutria · 04-22-2013, 01:38 AM

Quote:

Originally Posted by ozanbaba

how about cvlc? It's CLI to vlc.

Excellent!

This is what my ripping script now looks like:

Code:

#!/bin/bash

cvlc :start-time=1 --stop-time=4 dvd:///dev/sr0 vlc://quit 

BS=$(isoinfo -d -i /dev/sr0 | grep "^Logical block size is:" | awk '{print $5}')
VS=$(isoinfo -d -i /dev/sr0 | grep "^Volume size is:" | awk '{print $4}')
VSID=$(isoinfo -d -i /dev/sr0 | grep "Volume set id: " | awk '{print $4}')
VID=$(isoinfo -d -i /dev/sr0 | grep "^Volume id: " | awk '{print $3}')

if [ -z $1 ]; then 
    if [ -z $VSID ] || [ "$VSID" == "UNDEFINED" ] || [ "$VSID" == "NOT_SET" ] || [ $VID == $VSID ] ; then
        OF=${VID}
    else
        OF=${VID}_${VSID}
    fi
else
    OF=$(basename $1 .iso) # just in case I accidentally pasted in a name with .iso
fi

echo $OF
echo $BS
echo $VS

pv /dev/sr0 | dd conv=noerror bs=$BS count=$VS of=$OF.iso

sleep 3
eject /dev/sr0