[mythtv-users] Bitrate/quality on PVR-150
jedi
jedi at mishnet.org
Tue Aug 12 14:32:35 UTC 2008
On Tue, Aug 12, 2008 at 06:31:56AM -0400, Scott Traurig wrote:
> I have done extensive testing of PVR-150 et al settings in the interests of
> better quality. I can confidently say that you should run it at 6MBPS
> avg/8MBPS peak for 720x480 capture. Any less and motion artifact gets bad.
> Any more and no improvement can be noted. The best way to test this is to
> watch the crawl line on CNN et al followed by some sports like basketball.
>
> Quite frankly encoder quality for Myth sucks compared to Tivo or STB DVR
> appliances. It is Myth's biggest weakness (after the fact that mere mortals
Depends on which kind...
An S1/S2 comparable to what a PVR-150 is doing?
Or an S3/DirecTivo?
The latter is a digital capture system like an HDHomeRun. It has
the obvious advantage of not going through an extra D->A->D conversion.
> need not try to set it up!) Decoder quality is awesome as anyone can see
> from playing DVDs, but the PVR series of tuners and encoders are terrible.
> It's bad with straight video in from a STB (composite or s-video) and worse
> with the tuner. You might not notice if you've never owned a commercial DVR
> or DVD recorder but I have and the difference is dramatic.
Analog capture quality is dependent on quality of the incoming cable
signal and always has been regardless of who you are getting your recording
hardware from.
>
> Do we have any better choices for tuner/encoders yet?
>
> Scott
Given that "modern" and "better" PVR devices are no longer capable
of trading off quality for space, the quality tradeoff is dubious.
...place the blame where it really belongs: with your cable operator.
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