Save video file usb webcam

Hi forum,
Currently i have USB Logitech webcam which i will use for my project. I have successfully acquire the video image by using USB Acquisition. My question is: is it possible to save the video to an avi file while labview is acquiring the image from webcam? I have tried to look at Grab and Save to AVI which is in example but an error occured teeling me that no interface is found. How to solve this?

Hi Massi,
First off, this thread is quite old (2010). In the future, create a new thread so the community will be able to assist you better.
If your camera is DirectShow compliant, the IMAQdx drivers should allow you to capture fames in Measurement and Automation Explorer (MAX). Check first if you are able to perform a grab in MAX. You can also configure your camera’s parameters here as well (to make sure it is outputting at 30 fps).
To record the output in LabVIEW without missing any frames, there are a couple of examples that should provide the functionality we are looking for. In the NI Example Finder (found by in LabVIEW going to Help >> Find Examples) the first example is located under Hardware Input and Output >> IMAQdx >> High-level >> Grab and Detect Skipped Buffers. This VI will allow you to acquire from the camera and see if you are missing fames.
The next example is located under Hardware Input and Output >> IMAQ >> File Input and Output >> Grab and Save to AVI. This example uses IMAQ drivers (not the IMAQdx drivers that we need to use with the camera); the coding for saving to an AVI file is all we need. If you combine these two examples, you should be able to save to an AVI file and see if you are missing any frames.
Bill E. | Applications Engineer | National Instruments

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Save video file usb webcam

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