sweet piece of software :-) I'm starting to lean a little toward this lossless mpeg2->mpeg2 cutting, because this is a feature I've wanted to have as well. My friend also though of maybe the possibility of
The nice thing about this is that it can be as simple, or grow to be as complicated as you want. The basics of GOP chopping are already in gopdit, and could simply be integrated into MythTV proper (as part of mythtranscode, perhaps?). If you needed to get more complicated, you could work on reencoding the frames around a GOP cut to make sure no reference frames are missing. LOTS of issues with that since MPEG2 is a *huge* standard. The big thing that would be important is making sure the streams are valid... not just that they play. I think all the lossless cutting utils I've seen so far have modes where they are not robust. The streams they produce will play in some players, but not others... not good for transcoding/archiving.
Heck, as far as that goes, another (even simpler) project would be to generate a utility to export transcoded .nuv files (i.e. MPEG4-encoded files in a Mythtv-flavored Nuppelvideo file) to normal .avi files. The ancient MPlayer patch from two years or so ago still applies to the latest mplayer. Using 'mencoder -copy' to losslessly convert to .avi produces a slightly broken result. Close, but no cigar.
-Cory
************************************************************************* * Cory Papenfuss * * Electrical Engineering candidate Ph.D. graduate student * * Virginia Polytechnic Institute and State University * *************************************************************************
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