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View Full Version : Digital Capture Expert - I need help


crjackson
31st December 2002, 20:33
Okay,

First let me say this. I did search through the fourms and saw that many have the same problems as me, but no one gives information on how to fix the problem.

Problem: Audio/Video sync on digitally captured AVI files.

I capture like this... Play a VHS tape in VCR, send signal to my sony HandyCam Digital8 passthrough, send from Digital8 to computer through fire wire.

I've captured using Studio7, scenalyzer, vegas video, window movie maker, and on.. and on...

My system is fairly fast with an XP2100+ 512MB DDR-ECC-R, Abit KG7, WD1200(8mb buffer). No matter what I do, the longer the movie, the more the audio goes out of sync.

I used scenalyzer to split the movies into 2GB files and thought the problem was fixed. After converting to MPEG2 files, everything still seemed okay as far as I could tell. Then I join the files together (TmpgEnc Mpeg tools) and after it done, the sync problem comes back at the EXACT same spots I would get when doing a long, continious AVI file.

I can capture with my Pinnacle DC10+ in one long file and it stays synced. But if I render to MS DV Codec (so that I can transcode with CCE for best looking video)the rendered file will go out of sync in the same spots.

If I render the video to MS DV Codec using only 60min splits, and then join the 60min sections (TmpgEnc tools), it's all PERFECT! But this takes MANY hours.

Why can't I capture in digital without loosing the sync? It saves so much time, but sync is screwed up.

Does ANYONE know what causes this. It must be a Codec or File System thing I'm thinking.

I would even buy a Canopus 1394 capture card if I KNEW it would fix the problem, but somehow I doubt it would.

ANY insight as to what causes this would be greatly appreciated...

dar1us
31st December 2002, 22:03
Originally posted by crjackson
I've captured using Studio7, scenalyzer, vegas video, window movie maker, and on.. and on...


Guh...? - Buh...?

Hmm, not very free sounding software, cant be good. Try virtualdub_sync and things of that nature, iuVCR is also good. May I refer you to my reply in the following thread: http://forum.doom9.org/showthread.php?s=&threadid=41357
look at the second reply.

iuVCR is avalible at http://www.iulabs.com/ . These programs dynamically keep the audio in sync with the the video.

VirtualDub_sync is more used than iuVCR because it is an extension of a very popular theme. iuVCR is also good because it captures nicely?:)

Hope all of this writing was not wasted (all of it) and that you card has a WDM driver avalible somewhere!

crjackson
1st January 2003, 01:47
Originally posted by dar1us
Try virtualdub_sync and things of that nature, iuVCR is also good.
iuVCR is avalible at http://www.iulabs.com/ . These programs dynamically keep the audio in sync with the the video.

VirtualDub_sync is more used than iuVCR because it is an extension of a very popular theme. iuVCR is also good because it captures nicely?:)

Hope all of this writing was not wasted (all of it) and that you card has a WDM driver avalible somewhere!

Neither of these work with the DC10+ but that's not the problem. The DC10+ captures just fine, but produces a propriotary AVI that CCE and others can't handle.

That's why I want a FIREWIRE capture that will stay synced. I'll see if either of these can capture through firewire and staysynced. Scenalyzer is supposed to do that, but once files are made into a continous long file again, the sync is out again.

Even when the DC10+ plus capture is rendered to a compliant DV file, I have to render it in 60min chunks, and rejoin to keep it synced. That's why I wonder if the DirectShow, or the file system itself is flawed.

Thanks for the reply.

dar1us
1st January 2003, 02:20
So there are no WDM drivers avalible at all?

What chipset does it run on?

dar1us
1st January 2003, 02:28
DELETE ME - DOUBLE POST, DISCONNECTED AND DIDN'T REALISE IT POSTED

FredThompson
20th May 2003, 19:28
Try WinDV

You aren't running Win9X, are you?

An hour of DV is about 13G. You made comments about 2G chunks. If you're running Win9x, switch to Win2K.

RoopeT
23rd May 2003, 11:16
Install PicVideo MJPEG codec. You can capture with this codec + DC10 using Studio. The captured avi can then be fed straight for CCE.