[mythtv-users] transcoded nuv/mpeg4: really mpeg4?
ijr at case.edu
Thu Aug 18 17:23:38 UTC 2005
On Thursday 18 August 2005 12:53 pm, Brian J. Murrell wrote:
> On Thu, 2005-08-18 at 11:42 -0500, Kevin Kuphal wrote:
> > You're mixing apples and oranges. The recordings are in MPEG4 (DIVX or
> > XVID, i can't remember) inside an NUV container.
> OK. Good so far then.
> > You can't just
> > "recontain" a video
> Why not? The container just holds the audio and video segments/frames
> and syncing information doesn't it?
> I am proposing extracting the frames/segments without decoding and
> re-encoding them and placing the extracted frames/segments into a new
> container. AVI or OGG for example.
You don't really understand much about AVI, though. It contains _no_ syncing
information. A straight repack will lose av sync extremely rapidly. ogg's
pretty much the same way.
> > so you have to re-encode it to another container
> > (which is what nuvexport does).
> But why should I have to re-encode the streams just to put them into a
> different container? I thought the stream type was independent of the
> container. I have put MPEG4 into an OGG container before for example.
As long as the containers are relatively equal in capabilities, sure, that's
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