My PC-VCR captures with different fps, WHY?

[Fred H]

The capture settings in my PC-VCR (VT 1.52)are: MJPEG 704x576 25 fps but I recently discovered that my Marvel G400 captures with a wide range of fps, all from 24.411 to 25.051 or so. It happens from the same source (ie a TV channel)and at the same time with very short delay between the captures.

Can anybody tell me why or if it is normal?

I've been so surprised that I didn't tested other capture programs, only the PC-VCR, before asking this question, here.

[Fred H]

...but now I tested with Ulead MSP6 VideoCapture. Stable 25.000 fps every capture, so I continue to ask. What is wrong with the PC-VCR captured fps ?
Should I convert any wrong captured fps to 25 fps ?

[paulw]

I have found the same with my RRS . I now only use AVI_IO or MSPRO capture these days for that reason. From the small amout of testing that I have done with MSPRO6 it does not like having the clip properties ie FPS different from the project settings. From memory it wanted to re-render everything back to 25FPS. If I were you I would forget about the Matrox capture modual and use the one IN MSPRO

[Fred H]

Thanks, PaulW.
Your answer made me realize that the fault is not in my own Marvel G400. Nice to know, but the PC-VCR does other strange things too, i.e. it captures with Frame based not Field order B setting, as adviced by Matrox in the VTools Readme.txt, and other experts.
I allways used the Field order B in my MSP6 video edit, until now, but the Frame based gave me better results, though.