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-   -   HDV to DV downconverting: problems with sound (https://www.dvinfo.net/forum/high-definition-video-editing-solutions/77937-hdv-dv-downconverting-problems-sound.html)

Alex Savin October 21st, 2006 12:18 PM

HDV to DV downconverting: problems with sound
Allright, the problem is that sound is about 1% ahead of picture, after converting m2t 1440x1080p file into DV (RawDV or avi DV - same result).

On the original m2t file sound and picture are in perfect sync. I'm using Canopus Procoder 2 for downconverting, no funny settings, just usual DV profile.

Interesting thing - when using AspectHD for converting this m2t file into CineformAVI, completely same problem with audio sync - sound is a bit ahead of picture, and difference is growing while watching the video.

I flipped through forum, there were few topics about same problem, and none of them was really solved. Any idea, why this might happen, would be appreciated.

(and, I suppose, PC configuration has nothing to do with that, because this delay appears while playing back usual DV video, which never before caused any such problems).

Graham Hickling October 21st, 2006 09:07 PM

This is in PAL, right?

Procoder has an option that deliberately changes file length by a percent or so during its PAL-NTSC conversions (to improve convesion quality). I can't see why that would be relevant, really, but I thought I would mention it...

Alex Savin October 22nd, 2006 03:32 PM

Well, thanks, but that is not really about NTSC-PAL conversion, and more about m2t - AVI conversion.

Funny thing - just tried importing m2t file into Adobe Premiere 2.0 - and there is this audio gap as well. What I don't understand is that there is no gap at all when just playing back m2t files, say, on Windows Media player.

Graham Hickling October 22nd, 2006 04:29 PM

Yep, I realize that. I use Procoder for m2t-avi conversion in concert with Premiere Pro all the time and never have a problem, so maybe there's an installation issue.

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