[mythtv-users] Transcoding settings for DVB source

[David Whyte]

Cheers Andy,

I managed to get this working, thanks.  I transcoded a 30 minute show
to MPEG4 which made it frop from 1.6Gig to ~700MB, which is a nice
size, and still good quality.  My question is, is this some unique
MPEG4 container, or is it normal DivX/XviD?  The reason I ask is even
when I download the whole NUV file to my windows box, none of my media
players will play it even when I rename the file to .avi yet my
Windows box normally plays DivX/XviD just fine.

My ultimate plan is to be able to transcode some recordings to XviD so
I can play them on the train on my PDA whilst also being able to leave
the original high quality show on my Myth box.

Cheers,
Dave


On Sun, 30 Jan 2005 16:09:22 +0000, Andy Whitworth <andywhit at gmail.com> wrote:
> I must admit to being confused by the whole transcoding setup
> for DVB MPEG2 source :-)  The "standard" out of the box settings
> had the Recording Profiles transcoding settings set to transcode
> to RTjpeg - this resulted in transcoded file sizes being generated
> which were several times greater than the original.  Changing the
> codec to MPEG4 results in a file size of about the same as the
> original *but* I lose the automatic widescreen detection when
> playing back the transcoded program, hence my original q.
> 
> Perhaps I should rephrase the original question and ask whether
> anyone out there uses transcoding with a DVB source and what
> transcoding settings they use ?
> 
> Is it possible to cut adverts from an original DVB source program
> recorded in MPEG2 and save the transcoded file back in MPEG2
> format ?
> 
> Andy.
> 
> 
> On Sun, 30 Jan 2005 00:29:52 +1000, David Whyte <david.whyte at gmail.com> wrote:
> > Hey Andy,
> >
> > How exactly do you configure which format to transcode to?  Is it
> > merely a case of Myth knowing which format it is going to encode from
> > (in my DVB-T case, it is MPEG2) and therefore, you don't actually
> > assign a recording profile option anywhere, you just configure the
> > MPEG2 entry in Setup > TV Playback > Recording Profiles?
> >
> > I have never really understood it and never gotten it to work :(
> >
> > Cheers,
> > Dave
> >
> >
> > On Fri, 28 Jan 2005 21:43:34 +0000, Andy Whitworth <andywhit at gmail.com> wrote:
> > > Hi,
> > >
> > > I've just edited commercials out of a DVB sourced program and the resultant
> > > transcoded file size was about 3x the original!!  So I looked at my transcoding
> > > settings and changed the target coded to MPEG4 from RTjpeg.  This results
> > > in smaller file sizes i.e. less than the original rather than more :-)
> > > BUT, the transcoded program seems to have "forgotten" that it's a widescreen
> > > program and starts playing in 4:3 format.  If I change the ratio to
> > > 16:9 manually
> > > then it looks fine *but* I have to manually switch aspect ratio whereas the
> > > pre-transcoded original would automatically detect and switch to 16:9.
> > >
> > > Is there anything I can do to set transcoding to preserve the automatic
> > > widescreen detection ?
> > >
> > > Cheers,
> > >
> > > Andy.
> > >
> > >
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> > >
> > >
> > >
> >
> >
> > --
> > GMAIL is 'da bomb baby....YEAH
> >
> 


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