I asked the question at VCDHELPER.COM forum before. But no solution can be found. However, I can solve it by Pure Motion DV type convertor. Following is my experience:

I capture DV type I AVI by Ulead Medio Pro 6.0.0.2 and make final video at same format (type I) by same software (Ulead).

The video is perfect but the sound skip/ choppy slightly sometimes.

The problem can be solved by PureMotion: 1) I capture DV type I AVI by Ulead (same as above) 2) I use PureMotion DV type convertor to change the orginal type I to another type I file (actually, no change of DV type, but the file size is larger slightly) 3) I insert the new type I file and make another type I video by Ulead. 4) The final type I file is perfect on video and audio.

Why the type I file is differece in Ulead and PureMotion? No standard for type I file!

Pls comment

-- Vincent (vincym@ctimail.com), February 28, 2001

Answers

If the filesize became larger it's likely that is now type 2. DV is DV is DV, and when it's type 1, by any codec h/w or s/w, it has a constant bitrate of about 3.45mB/s. If it's type 2 this datarate becomes slightly bigger at about 3.6mB/s. For type 1, a 2GB *.avi file is therefore about 4.5mins long. You can then calculate which appears to be which. DV was conceived mainly as a digital consumer format, and the way the type 1 codec handles audio and video is not compatible with Video for Windows. Microsoft has, without fanfare, discontinued support for VfW and wants us to use DirectShow instead. Type 2 is a quick way of referring to various codecs written by third parties which converts to and from and type 1 and generally makes DV amenable to applications, including, but not limited to NLEs, whose lives revolve around VfW. Type 2 DV files are slightly bigger than their type 1 counterparts because the audio part is replicated separately from the AV stream. More and more applications now support direct handling of type 1 as OHCI and DirectShow is incorporated into their bag of tricks. For example, one can insert type 1 DV AVIs direct into the timeline with the latest Adobe Premiere 6 and manipulate them; this was not possible with the preceding 5.1c unless they were first converted to type 2 (with a full-blooded VfW DV codec like that from MainConcept).

-- Mehmet Tekdemir (turk690@yahoo.com), March 03, 2001.