AVI/Indeo number of frames vs. length

[zarker]

Hi, I have some AVIs compressed with Indeo 5.
I am trying to do some separate processing of
the audio and images. I don't understand
the relationship between the length of the AVI
in seconds and the number of image frames.
One of my AVIs is 3.47 seconds and 98 frames.
Another is 3.47 seconds and 87 frames. When
I was recording the AVIs I chose 30 frames
per second in both cases! Can anyone explain?
Thanks in advance.

[setarip]

Your samples are a bit too short to be questioning decimal point accuracy. Try a clip of at least one minute in duration...

[zarker]

Re: AVI/Indeo number of frames vs. length

Originally posted by zarker
Hi, I have some AVIs compressed with Indeo 5.
I am trying to do some separate processing of
the audio and images. I don't understand
the relationship between the length of the AVI
in seconds and the number of image frames.
One of my AVIs is 3.47 seconds and 98 frames.
Another is 3.47 seconds and 87 frames. When
I was recording the AVIs I chose 30 frames
per second in both cases! Can anyone explain?
Thanks in advance.

I asked one of my profs about this and he said
that frames will sometimes be skipped if the
system cannot keep up. He recommended I try
a faster computer, or different encoding methods.
It sounded like he thinks the interface (USB vs. FireWire, etc.) can also make a difference.
I think he recommended using pro video gear with a FireWire
interface.

[setarip]

Have you tried what I suggested, to see if you arrive at more consistent and accurate results?