so... screenshots anyone?
On 9/29/05, Baudouin, Andrew <[EMAIL PROTECTED]> wrote: > See, your problem is that you assumed I was talking about bt87x in > particular. I said "a framegrabber". > > :) > > > Are the Hokies actually going to come into LSU in 2007? Or is > Back-Out-Beamer going to wuss out again? :) > > > -----Original Message----- > From: Cory Papenfuss [mailto:[EMAIL PROTECTED] > Sent: Thursday, September 29, 2005 4:21 PM > To: Discussion about mythtv > Subject: RE: [mythtv-users] Re: Hardware MPEG2 vs bt878 > > On Thu, 29 Sep 2005, Baudouin, Andrew wrote: > > > Actually, believe it or not... > > > > All things equal a framegrabber will result in superior quality on-disk. > > The problem lies with the quality of the tuner on the cheap > framegrabbers. > > It's clearly below that of the more expensive hardware cards. > > > > To preserve quality ideally you'd like to have the raw video on disk and > > compress it as you see fit rather than go straight into MPEG2. > > > > > "Everything" is not equal in this case. The BT878 chip has > inherently lower resolution for composite inputs (e.g. anything coming in > via the tuner) than the SAA7115 or the CX--- that the PVR-[123]50's use. > That has a much larger effect than the MPEG compression artifacts. The > MPEG artifacts can be effectively eliminated by cranking up the bitrate to > lots... it'll still be more space efficient than RAW captures. > > Since he's planning to use svid in an presumably an external > demodulator, the difference may be less. The lower resolution is the lack > of comb filters... that's not used for s-vid inputs. There are still some > (optional) filters in the signal flow path. One would have to ensure they > were off. The CX--- chip still has 10bit vs. 8bit for the BT878. > > -Cory > > -- > > ************************************************************************* > * Cory Papenfuss * > * Electrical Engineering candidate Ph.D. graduate student * > * Virginia Polytechnic Institute and State University * > ************************************************************************* > > > _______________________________________________ mythtv-users mailing list [email protected] http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
