[mythtv-users] Nonlinear MPEG2 editor that doesn't suck?

Cory Papenfuss papenfuss at juneau.me.vt.edu
Wed Dec 15 12:57:30 UTC 2004

>>  	I've been using avidemux in the past to recrunch pvr-250 recorded
>> streams onto DVD.  Not too much difficulty, and it appears that I always
>> get a 66ms difference between audio and video.  With this tape transfer,
>> however, it appears that the A/V sync amount changes as the tape recording
>> goes on.  Maybe because the pvr-250 had to do weird things because the VCR
>> that was playing the recording did odd things at the cut?
> Why not record directly into a dvd mpeg using your pvr 250?
> I've been using gopchop to cut up mpeg streams.  Downside is that you can
> only cut every 12 frames (I think), but it doesn't do any recoding!
 	That's what I'm trying to do now.  I played with GOPCHOP awhile 
back, but at the point it broke the MPEG stream around the cut.  Avidemux 
didn't do that, so I started with that.  In the past, I was going for the 
best possible quality/size.  My "archival" of TV shows is typically done 
at 352x480 on the DVD.  The PVR-250 recordings at that low of a resolution 
is pretty crappy.  I record at a higher resolution (640x480) and higher 
bitrate (4-5Mbps), and then downsample in both size and resolution with 
2-pass encoding.  Much better quality per filesize.


* Cory Papenfuss							*
* Electrical Engineering candidate Ph.D. graduate student               *
* Virginia Polytechnic Institute and State University 			*

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