Tweet
I too have a Hauppauge PVR 250 and have noticed the exact same problem. Capturing from a TV source, is fine. Absolutely perfect, steady audio/video sync.
When capturing from VHS, its very hit and miss, but here is a way you can manually insert a sync problem.
Press play on your VHS, press record on your PVR. Then do a slow rewind (just hit the rewind button on your VHS) for approx 10 seconds, then press play again.
Playing back this MPEG2 using the Cyberlink PowerDVD Codec, results in perfect synchronisation. Doing any kind of editing in TMPGEnc, or Womble, or even opening it up in VirtualDub MPEG2 - scrolling to the end, pressing play, results in bad synchronisation. The video ends up before the audio.
PVAStrumento sees this problem, and tries to fix it. It does a better job than Womble's GOP fixer, but the audio is just choppy then.
When I parse the MPEG2 however using DVD-Lab, for the ten seconds I press play, and only those ten seconds, I see many frames marked as Quant Matrix Extension. Is this a coincidence? My hypothesis is the majority of editors dont handle these Quant Matrix Extensions well.
Either that, or Hauppauge is corrupting the MPEG2. Its bizarre how ULead DVD Movie Factory 2 SE has no problem with creating a DVD from the MPEG2's.
Question therefore, can the Quant Matrix Extensions be removed in anyway? Is this the problem?
Cheers
Simon
When capturing from VHS, its very hit and miss, but here is a way you can manually insert a sync problem.
Press play on your VHS, press record on your PVR. Then do a slow rewind (just hit the rewind button on your VHS) for approx 10 seconds, then press play again.
Playing back this MPEG2 using the Cyberlink PowerDVD Codec, results in perfect synchronisation. Doing any kind of editing in TMPGEnc, or Womble, or even opening it up in VirtualDub MPEG2 - scrolling to the end, pressing play, results in bad synchronisation. The video ends up before the audio.
PVAStrumento sees this problem, and tries to fix it. It does a better job than Womble's GOP fixer, but the audio is just choppy then.
When I parse the MPEG2 however using DVD-Lab, for the ten seconds I press play, and only those ten seconds, I see many frames marked as Quant Matrix Extension. Is this a coincidence? My hypothesis is the majority of editors dont handle these Quant Matrix Extensions well.
Either that, or Hauppauge is corrupting the MPEG2. Its bizarre how ULead DVD Movie Factory 2 SE has no problem with creating a DVD from the MPEG2's.
Question therefore, can the Quant Matrix Extensions be removed in anyway? Is this the problem?
Cheers
Simon
Comment