I would like to be sure that the acquisition frame rate is constant despite some image processing. It's why i need to use a buffer (with more than one image) as it seems possible to do with standard NI-IMAQ. I didn't find such options with IMAQ 1394 (similar to "IMAQ Configure List.vi", "IMAQ Configure Buffer.vi" and "IMAQ Extract Buffer.vi" in NI-IMAQ).
I read on a previous post entitled "Ring acquisition with NI-IMAQ 1394" that it is not possible.
Does the new version of Labview (7) or new upgrades of NI_IMAQ solve this problem. Is it exist an alternative way to do that ?
IVision can solve this problem. You can do realtime saving into avi file or buffer them up (by using different image names). Using the callback vis you can make sure to capture each frames without dropping. Get a demo version to try out at: http://www.hytekautomation.com/Products/IVision.html
Doing a ring acquisition is not possible, however, if you can limit your acquisition to a finite number of frames, you can do a sequence to acquire your images and then process them afterwards.
