On Tue, Sep 20, 2005 at 02:31:36PM -0500, Tony McDowell wrote: > >I doubt that you can see the difference between a 720x480 pixel and > >a 480x480 pixel recording, so I would recommed go down to 480x480 > >pixels. That saves 25% of the data. If you want to export to DVD > >you might however consider 720x480 pixels and keep the recordings > >in MPEG2. Also if you want to use the output of a PVR-350 you > >should keep the recordings in MPEG2. In all other cases you can let > >MythTV transcode to MPEG4. > > > >The encoding rate is very much up your personal taste. If your > >signal is bad you need a higher data rate. I usually record 480x576 > >pixels (PAL) at 4.5 Mbits/s in MPEG2 and transcode it to 1.4 > >Mbits/s in MPEG4. On some channels I can see the artifacts, on > >others I can't (except in special situations like fast scrolling > >text). Shows that I want on DVD are recorded at 720x576 pixels at > >4.5 Mbits/s in MPEG2. > > Thanks for the insight. If I just keep it as MPEG2, what kind of > file size should I expect? I'm imagining about a gigabyte per hour. > Is that high, low, other?
FWIW, 1GB/hr is Tivo's "Basic Quality" setting. Their "Best Quality" setting is about 3GB/hr. --Rob
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