actual fps

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leith
Posts: 194
Joined: Tue Jan 02, 2007 2:17 pm

actual fps

Post 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.
Birch
Posts: 1139
Joined: Thu Jan 30, 2003 5:00 am
Location: Corvallis, Oregon

Re: actual fps

Post 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.
leith
Posts: 194
Joined: Tue Jan 02, 2007 2:17 pm

Re: actual fps

Post by leith »

Cool. Thanks Birch.
Jim
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Joined: Mon Oct 14, 2002 5:00 am
Location: Corvallis, Oregon
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Re: actual fps

Post 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.
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