CXB wrote:
If you have the IMAQ USB VIs working, then you should be able to take the "Image Out" from a IMAQ USB Snap or IMAQ USB Grab and send it to a AVI Write Frame (Functions » Vision and Motion » Vision Utilities » Files » AVI). There is a good example of this in the LabVIEW Example Finder (Help » Find Examples...). You can find "Grab and Save to AVI" by searching for "AVI" in the examples. This example uses the IMAQ VIs instead of the IMAQ USB VIs, so you will have to swap those out.
Well Thank you for that info, I got the program to record from the USB camera to an .AVI file, that was really exciting! LOL
AlexK wrote:
I accomplished something similar to this for a current project by
capturing individual video frames to a lossy queue and writing them to
a motion-jpeg formatted file when an event occurs. The only issue with
this method is that it might be outside of the memory capabilities of a
SBC, especially if you're hoping to store 5 minutes of video, or you
need a particularly high frame rate.
Keeping
individual frames in a ring buffer-type construct may be the way to
approach the logistical challenge of keeping X-seconds of video in
memory prior to an event. Getting those frames into the playback format
of your choice is another issue.
Well 5 minutes was a very rough guess. For our application, maybe even just one minute would be enough to capture what happens during a car accident. I need to figure out what our next step should be.. Maybe figuring out what I need to add to the program now for the accelerometer data acquisition.. I'm not sure exactly, this is all new to me, but I still want to make an A!
