arthurs
how do I know if my video uses a variable or constant frame rate
The sure way to know if your video was recorded with a variable frame rate is to look at the video properties readout in MediaInfo (Tree view). If the video was recorded with a variable frame rate, you will see 3 frames rates
minimum frame rate
frame rate
maximum frame rate
Have you gotten to John's suggestion regarding using MediaInfo to get video properties information?
A typical video readout from MediaInfo (Tree View) will look like the following
(following is for a video recorded with my iPod which uses variable frame rate...note the 3 frame rates under video properties)
Image may be NSFW.
Clik here to view.
ATR