Dear Reut,
You are on the right track! Based on what you have posted about your application thus far, I would suggest taking a look at the
Grab and Save to AVI example that ships with LabVIEW. With this VI you can save your grabbed images to an AVI file. Some things to note:
1. You will still need to do a triggered grab. The rate at which you grab images from the camera will specify how many fps will be written to the AVI file. This is different from the Frames Per Second input to the IMAQ AVI Create VI. The input to the IMAQ AVI Create VI will specify at how many fps the AVI will play back when you open it, say in Windows Media Player.
For example, say you set up a triggered grab to capture images at 4 fps, and you specify the
Frames Per Second input to the IMAQ AVI Create VI to be 16 fps. With these parameters, you will be saving 4 frames to your AVI file every second while your program is running. When you open the AVI after stopping your application, the AVI will play back at 16 fps, even though you acquired at 4 fps. In effect, your video will be played at 4X fast forward speed.
2. Depending on how long you will be running your application, and what you will need to do with the AVI afterwards, you should consider compressing to the AVI file. Here is a good KnowledgeBase that discusses AVI compression in LabVIEW:
Writing a Compressed AVI File with IMAQ Visionhttp://digital.ni.com/public.nsf/allkb/0A4D5BF47FD3FF0186256E9A004FD671?OpenDocument
Please post back if you have additional questions or run into problem with the implementation of your application.
Best Regards,
~Nate
