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Old 2006-12-09, 09:02   #17 (permalink)
knutinh
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Quote:
Originally Posted by SpeedFreak View Post
With my current configuration I lose zero frames and has minimal jitter. I do get an occasional skip but I believe that is due to disk contention (not that my disks are slow). The picture quality is perfect when I watch digital material (DVD, XviD, etc), but grainy, blurred and completely out of sync when I watch TV.
Could it be audio/video resync that is causing the slight frameloss that you are seeing? Audio and video are sent using local "clocks", while your soundcard and videocard has their own hardwareclocks. All man-made clocks drift, and when your soundcard clocks differ enough from the video clock, the code has to decide whether to skip video-frames, audio-frames, to loose lip-sync or risk emptying input-buffers.
Quote:
I don't believe the argument that it isn't possible to get acceptable quality with "our" configuration. Yes, the source video is 50Hz and the TV only supports 60Hz. Yes, there is a difference in resolution and interlace. But... the TV itself doesn't seem to have the slightest problem with these conditions; The picture is perfect when I use the TV's own tuner, deinterlacer, scaler etc.
Are you shure that your tv does not support 50Hz when its intenalt tuner is used and receiving a PAL signal??
Quote:
If the TV can manage, then so should MP. The only real reason I can think of why my MP system can't compete with the TV on its own, is that the TV probably has a better tuner. Apart from the tuner, MP should be able to match all the TV's quality features in software.
Given that the tv "gives" MediaPortal access to the same possibilities that it allows its internal tuner and that your PC tuner is of equal quality, then yes. MP cannot compensate for stupid tv-design though (such as crippling the PC input).

-k
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