Sync problems when doing long type-2 captures

[slolsby]

Is it normal for sound and picture to slowly drift out of sync when doing a long capture to type-2 DV? I don't get this with type-1 and sync remains rock solid even after a three hour continuous capture (using DVIO). I also get the same problems if I capture to type-1 then use either the Ulead or Canopus DV convertor to convert to type-2. It's a bit annoying because it's obviously easier to work with type-2 rather than type-1.

On another note, is it normal for Avisynth to generate an exception if you use AVISOURCE to open a type-1 file (type-2 are ok)?

[SomeJoe]

For your first question, the root of the problem is going to be your DV camera or DV tape deck. See Adam Wilt's Explanation of Locked Audio (http://www.adamwilt.com/DV-FAQ-tech.html#LockedAudio).

As for the AVISynth question, I have no idea. I don't think I've ever worked with DV files together with AVISynth. I work with Adobe Premiere primarily. Might want to post that question in the AVISynth forum.

[baz00ie]

quote.......
On another note, is it normal for Avisynth to generate an exception if you use AVISOURCE to open a type-1 file (type-2 are ok)?


Yup, that's normal. If you wish to view DV type-1 in AVIsynth then use DirectShowSource(). With that, however, the video will be decoded with the Microsoft DirectShow DV Codec and NOT your codec of choice.

There are ways to re-sync the audio within applications such as VirtualDub - that way you can continue to use type-2 DV or you can use shorter captures and re-assemble in AVIsynth.

good luck
baz