[mythtv-users] how to get direct MPEG2 output

[Sam Byrne]

And I'd say your approximation is incorrect.  Those numbers are
extremely high.

Sam
On Mon, 2003-11-24 at 10:56, Ken Bass wrote:
> Jelle,
> You are definitely not running uncompressed. If my *approximation* is correct:
> Assuming 30 fps, 720 x 480 pixels, 24 bits/pixel:
> 720 x 480 x 24 x 30 = 248,832,000bps ~ 31MB/sec * 3600secs/hour = 111 GB/hour
> (74GB/hour at 480x480 which is mythtv default).
> 
> I have changed my recordings to use 352x480 which is called 1/2 D1 rate and it
> is a resolution supported by the DVD standard. From what I understand there 
> are only two
> resolutions (in the NTSC world) that DVD supports - 720x480 and 352x480. If 
> you are playing your DVD's using PC software sometimes those specs aren't 
> enforced and you can get away with different resolutions but if your goals 
> is to archive onto a DVD that is the most compatible with a range of 
> standalone DVD players, I'm thinking only these two resolutions makes 
> sense. By capturing at these resolutions I don't need to reencode. In 
> theory you can then cut out the commercials for archiving without having to 
> reencode. I still have not found a tool that lets me cut out commercials 
> without reencoding. I've tried a ton of windows and linux programs and most 
> of them either don't work or they screw up the audio/video sync. I'm still 
> working on that.
> 
> At 11:23 AM 11/24/2003 -0500, you wrote:
> >On Mon, 2003-11-24 at 09:44, Jelle Kalf wrote:
> > > Hi,
> > >
> > > I tried recording 4:02 minutes of data and it came back to me with 151MB of
> > > data. I have a PVR250 card which should have instand MPEG2 compression. 
> > What did
> > > I do wrong, because it looks like it's just outputting uncompressed data...
> > >
> > >
> > > Jelle Kalf.
> >
> >151MB/4 minutes*60 minutes/hr ~ 2.2Gigs/Hr which is what I get with my
> >PVR 250 and 350 under normal circumstances.  What makes you think this
> >is wrong?
> >
> >
> >-jose-
> >
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> 
> 
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