Difference between revisions of "Extract DVD"

Revision as of 09:27, 19 September 2012

Space not an Issue?

If hdd space is not an issue then grab the whole DVD Read the DVD to a rescue image ignoring bad blocks

/dev/<dvddevice> <title>.ddrescue

vobcopy -i <title>.iso -m -t <title>

Then create an iso image from it

genisoimage -dvd-video -o <title>.iso <title>

Make smaller files

This describes how to convert a DVD to OGG video using:

• libtheora for video
• libvorbis for audio
• srt subtitles

Installation

Install the packages

apt-get install libav-tools lsdvd mplayer oggz-tools

For using encrypted DVDs build and install libdvdcss from http://download.videolan.org/pub/libdvdcss/last

./configure --prefix=/usr
make
make install

Prepare

Use lsdvd to see what's on DVD. Determine the stream you would like to extract as well as the aid for audio and the sid for subtitles.

lsdvd -x

Write the stream to the harddrive so the next steps will go faster.

mplayer dvdnav://<stream> -dumpstream -dumpfile <title>.vob

Investigate the VOB file and note the numbers for the videostream and the audiostream

avprobe <title>.vob

Some VOB files report the wrong duration so just in case rebuild the vob file but only with the required videostream and audiostream.

avconv -y -i <title>.vob -map 0:<videostream> -c:v copy -an -sn -f vob <title>_video.vob
avconv -y -i <title>.vob -map 0:<audiostream> -c:a copy -vn -sn -f ac3 <title>_audio.ac3

Audio

Now extract audio from the stream and convert to OGG.

avconv -y -i <title>_audio.ac3 -c:a libvorbis -q:a 5 -ar 44100 -vn -sn -f ogg <title>.audio

Video

Detect the amount to crop.

avconv -y -i <title>_video.vob -t 600 -vf cropdetect -an -sn -f rawvideo /dev/null 2>&1 | tail | head -n 1 | sed 's/^.*crop=//'

Convert the video stream to ogv

avconv -y -i <title>_video.vob -r 25 -g 250 -bf 16 -filter:v yadif,crop=<cropvalues>,scale=in_w:in_h/sar -q:v 9 -c:v libtheora -an -sn -f ogg <title>.video

Subtitles

Extract the subtitles from the stream.

To do!!!

Merging

Combine everything in a ogg container

oggz-merge -o <title>.ogv <title>.video <title>.audio