[mythtv-users] PVR recordings to DVD

[Justin Mayfield]

3.6GB /hr sounds like 8Mbit avg 16Mbit peak settings, which are the
defaults for the ivtv driver.  I assume you are using this;  Just send
the ioctl via "test_ioctl" to turn the bit rate down to a lower level,
and you can easily double, triple, quad, etc the amount of video per
disc based on your willingness to accept lower quality.

JM



On Tue, 2003-06-24 at 09:56, creator at inreach.com wrote:

> Hay all, I've been playing around with getting the mpeg2 recordings produced 
> by my PVR through myth to be recognized by dvdauthor so I can burn them to a 
> dvd without going through a transcode process...  and I've finally got 
> something that works!  So, I thought that i'd share...
> 
> Here's the key... For some reason, dvdauthor will not recognize the 
> recordings, so they must be ran through transcode at some point to fix them 
> up a little.  The way I found that was to use the transcode utilites to demux 
> and then remux the file, but never running a full transcode process.  This 
> way the whole process is really fast (disk bound) but you will need to have 
> some spare space lying around.
> 
> Here's my simple test script...
> 
> #!/bin/bash
> tcextract -i $1 -x mp3 > $1.m2a
> tcextract -i $1 -x mpeg2 > $1.m2v
> tcmplex -i $1.m2v -p $1.m2a -o $1.vob -m d
> rm -f $1.m2v $1.m2a
> mkdir testing
> dvdauthor -o testing -t $1.vob
> rm -f $1.vob
> dvdauthor -o testing -T
> mkisofs -dvd-video -o testing.iso testing/
> rm -rf testing
> 
> And it seems to work!  I've burned the output iso to a DVD-RW and played it in 
> my sony dvd player and it works great!  The only downfall is that the 
> compression on the file sucks and it takes nearly a full disk for only an 
> hour of video (3.6 gig).  This is of course with myth set to record at 
> 720x480 at it's max bitrate with the stream type set to 10 (dvd). 
> 
> My next project is to try to find an effient way to re-encode these to have 
> better compression so I can fit two hours onto a dvd-r (like we can currently 
> with our tivo recordings) and to chop commericals out (but that may just be a 
> pipe dream).
> 
> If anyone else has this working or has a different method you're working on, 
> please let me know.
> 
> Thanks!
> 
> Robert Stellhorn
> creator at inreach.com
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