Scene detection in HDV

[Jan Laros]

As PE3 lacked scene detection for HDV I have been using the capture-utility HDV Split 0.75. This scene detection is based on Date/Time code and works well.
PE4 now offers scene detection for HDV based on picture content. I did a little test capturing the same part of videotape using both systems.
The one minute tape I captured contained some 8 scenes and both scene detection systems produced identical results.
There was only one difference, each clip captured by HDV split is 2 frames shorter than its equivalent captured by PE4.
Does anyone have an explanation for this phenomenon?
Not that I am worried about the loss of two frames, but I like to know why.
I will continue to capture with HDV Split as it produces a single file for each clip which gives you more flexibility in file management on your hard disc.
In naming the files you have the choice between sequential numbering or date/timecode numbering. I have a preference for the latter.

[Chuck Engels]

Hi Jan,
Can you tell if it is the first and last frame from each clip?

[Jan Laros]

Hello Chuck

You are bright and early.

It is the first two frames of each clip

[Chuck Engels]

Almost noon here

Not sure why the frames are dropped, shouldn't matter really.

[VernonRobinson]

This is a long shot, but could it be the pre-roll to get the camera started?

-Vernon

[Chuck Engels]

That would account for two dropped frames at the beginning of the capture, or more like 2 seconds worth (60 frames).
I don't think that would cause two dropped frames at the beginning of each clip.