[mythtv-users] MPEG2 cutting script complete
lists at forevermore.net
Mon Aug 16 14:50:14 EDT 2004
> I'd like to inquire about something vaguely related to this: From this thread
> I understand it is impossible to get rid of commercials without transcoding
> the mpeg2 stream to mpeg4, is that correct ?
It's impossible directly within mythtv. This addition to nuvexport lets
you cut commercials without transcoding the mpeg2 source.
> If so, I have a bttv card and plenty of CPU, so I record in mpeg4 and then
> transcode to get rid of the commercials, and I still have meg4 then.
You can transcode all you want. The nice thing about the mpeg4->mpeg4
commercial cutting is that it does NOT transcode the whole stream (thus,
you don't lose quality), but only the portions right around the cut
points where a few frames need to be "fixed" (basically, so they match
> So is it really true that one cannot transcode mpeg2 -> mpeg2 but one can
> transcode from mpeg4 -> mpeg4 ? (Why is that? Lack of a fast mpeg2 codec ?)
I believe it's "lack of an mpeg2 codec" -- fast isn't an issue with
transcoding. There *was* intent to add this, but I haven't heard
anything about it in a long time.
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