On Mon, Dec 10, 2007 at 03:52:10PM -0800, Bob McGowan wrote: > Andrew Sackville-West wrote: >> On Wed, Nov 28, 2007 at 08:43:38AM -0500, Scott Lair wrote: > ---deleted--- >> so its not strictly etch. Also, these cards include hardware mpeg >> encoding which can be a blessing and a curse, depending on your >> situation. >> A > > Could you expand a bit on the subject of "a blessing and a curse" with > respect to hardware mpeg encoding?
It's a blessing because having the mpeg encoding performed in hardware on the card takes the load off your cpu. You can process more streams with less cpu. It's a curse because the streams are compressed before you get access to them. Any additional processing you might do will be done on data that has already been compressed, leading to degraded quality. ymmv. > > Or, point to a relevant discussion of the issue? well, we're having one right now ;-) > > I've been holding out, waiting for hardware mpeg card support in MythTV > (been a while since I've checked, looks like it may have improved since) > and was not aware of negative issues with it. The hardware mpeg support is not in MythTV directly but is in the drivers for the particular cards. Many of the Hauppage PVR cards (I have two) have been supported by ivtv drivers for at least a couple of years. You should be looking for kernel support for the cards, not mythtv support. If there is kernel support, then there will be /dev/video* devices that mythtv can record from. A
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