On Jul 31, 2005, at 3:06 PM, Todd Ignasiak wrote:
I've been doingh the same analysis on HD playback . I've been doing XvMC with an FX5200 AGP card. When it's working well, it's very good. But, I get the "prebuffering pause" issues, which causes choppy playback
I don't have a tuner in my MythTV box right now. For my setup with the SD DirecTIVO it doesn't make sense for me to invest in a MythTV box for SD. My Pundit strictly handles DVD playback using MythTV as a nice front end to Xine.
I'm surprised that you were able to do HD playback via the PCI bus. I didn't think the bandwidth was sufficient for [EMAIL PROTECTED] Maybe XvMC changes the equation a bit.. Can you still get decent HD playback without XvMC
I have a few test clips I used. One of which was the test clip found on the pchdtv.com site. Others are available from various locations on the Internet. On the Pundit with a 2.4GHz Northwood P4 chip I cannot playback any HDTV streams without serious stuttering. All to be expected. Once I popped in the PCI FX 5200 I was able to play back the same test clips with the previously noted issues. CPU was around 35% during playback.
Another thing I'm interested in is the 'Unichrome' display adapters. This S3/VIA video chips do full MPEG decoding, not just the iDCT+MC done with XvMC. I don't know if it is any more/less capable with things like de-interlacing. Also, the 'Unichrome' version is integrated into the motherboard, I don't know if they have the same capabilities in their add-in cards.
I've thought about this too. Right now the investment is to high for me to pick one up on the cheap to try out. As such, I think the way to go would be a nice powerful CPU and a quality DVI based video card. Together with existing Linux post processing software in Xine (which uses stuff based on tvtime) I think the quality would be as good as it gets for a HTPC.
Prior to moving to MythTV, I used a 'MyHD' card in Windows. It had a hardware MPEG decoder, which did a nice job of scaling and de-interlacing, which almost no CPU requirements. I would love to find something similar for MythTV.
I think lots of us would. Right now such a solution doesn't exist. i would expect as HDTV becomes more popular here in the US we'll see something for Linux in the next 5 years. Right now hardware HDTV decoding and playback on Linux seems to be where V4L was 5-6 years ago.
_______________________________________________ mythtv-users mailing list [email protected] http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
