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actual fps

Posted: Tue Dec 11, 2007 10:46 pm
by leith
so,

you know how with ntsc video, generally its said that the framerate is 30 fps, but in reality, it runs at about 29.97 fps?

when we say that a V100 runs at 100fps, do we mean 100fps? Or do we mean 99.9 fps?

Just checking. I'm getting my frames via a network stream now, so I'm kind of detached from the camera hardware. Having the cameras push data to force my app into a rate is not an option. My software will drop frames from network buffers if they overflow, just in case, but my app needs to run its own systems at a framerate from its own embedded timer, and I want to make sure that over long runs, I'm not dropping frames.

hope that makes sense.

Re: actual fps

Posted: Wed Dec 12, 2007 9:08 pm
by Birch
Brad,

Jim has the final word on this, but we attempted to make it as close to 100 fps as possible. I double checked on the scope and it reads 100.0hz exactly. There is probably a small fractional component in there eventually.

Re: actual fps

Posted: Wed Dec 12, 2007 10:31 pm
by leith
Cool. Thanks Birch.

Re: actual fps

Posted: Thu Dec 13, 2007 6:22 pm
by Jim
Brad:

As close as we can measure it is 100hz. You can measure this from the SYNC OUT on the last camera, the start of each sync pulse should be 10ms apart.