DVD Ripping

Posted 04-25-2011 at 10:54 AM by sag47

I work for a Scientific Institution and a company which recorded talks decided to give us all the talks in DVD format instead of a hard drive full of video files. This is kind of counter intuitive however luckily I use Linux at work. Long story short mencoder with lame installed solved my problems.

Code:

mencoder 
-vf harddup 
-vf-add smartblur=.6:-.5:0,unsharp=l5x5:.8:c5x5:.4 
-xvidencopts fixed_quant=4:profile=dxnhtntsc 
-lameopts cbr:br=128:aq=0:vol=1 
-oac mp3lame 
-ovc xvid 
infile.vob -o outfile.avi

Source of my command.

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I found a nice solution for lossless encoding using ffmpeg. I think I like it more than use mencoder.

Code:

ffmpeg -i VTS_01_1.VOB -acodec libfaac -aq 100 -ac 2 -ab 128k -vcodec libx264 -vpre lossless_medium -threads 4 video.mp4

From the man page I used the FAAC audio codec with audio quality 100% (-aq 100), two audio channels (-ac 2), and an audio bitrate of 128kbps (-ab 128k).

For the video quality I used some preinstalled presets.

Quote:

Originally Posted by ffmpeg man page

Code:

       If no such file is found, then ffmpeg will search for a file named
       codec_name-arg.ffpreset in the above-mentioned directories, where
       codec_name is the name of the codec to which the preset file options
       will be applied. For example, if you select the video codec with
       "-vcodec libx264" and use "-vpre max", then it will search for the file
       libx264-max.ffpreset.

The quality preset file can be found at (on my system):
/usr/share/ffmpeg/libx264-lossless_medium.ffpreset

The -threads means that it will encode the video taking advantage of multiple cores on a system. I have four processing cores so I set threads to 4 (-threads 4).

Sources:
http://superuser.com/questions/22777...on-with-ffmpeg
http://ubuntuforums.org/showthread.php?t=1564791

I got ffmpeg for Fedora 16 from these repositories.

Code:

rpm -Uvh http://download1.rpmfusion.org/free/fedora/rpmfusion-free-release-stable.noarch.rpm
rpm -Uvh http://download1.rpmfusion.org/nonfree/fedora/rpmfusion-nonfree-release-stable.noarch.rpm

You may find that you won't have the required codecs. I had to use an alternate audio codec other than faac because it wasn't available for my system. You can view available codecs for ffmpeg with the following command.

Code:

ffmpeg -codecs

Posted 06-11-2012 at 08:19 PM by sag47 sag47 is offline

Updated 06-11-2012 at 08:32 PM by sag47