[mythtv-users] PVR250: 480x480 vs 720x480

[Mark Dobossy]

Jeff-

The size of the file is not dependent on the resolution, but on the 
bitrate.  2500-4000 means 2500-4000 K per second of recording, 
regardless of the res.  Thus, a 2500-4000 720x480 may be of lower 
overall quality than a 2500-400 480x480, as it requires more 
compression.  There is a fine balance between res and bitrate, and I 
have yet to find just the right combo :)

-Mark

On Dec 3, 2003, at 3:57 PM, Volckaert, Jeff wrote:

> Hello Everybody,
>
> Up until a few days ago I had been using 480x480 2500-4000
> bitrate for recording and getting 1.3G/hour.  My wife got a
> dvd/tv combo last weekend though and it can't play misc
> mpgs burned to DVD like my other player.  So I changed the
> default res to 720x480 and waited to see my 1.3G files
> swell up to 2G or more.  Well, that didn't happen.  I still
> get 1.3G/hour.  I thought I must have screwed up the change
> and it didn't stick.  Nope, it's recording at 720x480 and I
> can make a DVD which plays just fine in the dvd/tv combo.
>
> What gives?  Why is 480x480 and 720x480 producing the same
> file size?
>
> Thanks,
> Jeff
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