[mythtv-users] DVD Ripping with MythDVD - couple of questions (AC3, subtitles & CD-automount)

Andrew Dodd atd7 at cornell.edu
Thu Jan 15 22:39:05 EST 2004


Quoting Tim Harvey <tharvey at alumni.calpoly.edu>:

> Could anyone explain what happens to the AC3 audio and subtitles when
> MythDVD rips a 'perfect' quality dvd?  Its my understanding that with
> this setting it just decrypts the VOB and otherwise doesn't touch those
> things.  This would mean that you have a perfect copy of all AC3 audio
> tracks correct?  If that is the case, would it be an appropriate change
> to MythDVD to disable these if 'Perfect' quality is selected? 
Worst case, a script like this set up as a transcoder would work:  (Well, maybe.
 I'm not very familiar with Myth's transcoding functionality.)

It requires dvdauthor (provides mpeg2desc) and mjpegtools (provides mplex).
-------------
#!/bin/sh

mkfifo aud0
mkfifo vid0
mpeg2desc -a0 < $1 > aud0 &
mpeg2desc -v0 < $1 > vid0 &
mplex -f 8 -V -o $2 aud0 vid0
rm aud0
rm vid0
------------
That will extract the first audio and video streams from the first file named as
an argument to the script, and remultiplex only those two streams to a new MPEG
file listed as the second argument to the script.



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