Avi file does not have the same resolution as image file?

I'm using LabView with an IEEE-1394 camera and I set up the camera to record at a resolution of 1280 x 960 and can snap images and save them at that resolution from Measurement and Automation Explorer, but when I record avis using LabView, they have a resolution of 720 x 480 even though the images being written to the avi are 1280 x 960. I have had this same problem trying to make new videos from the original in which I extract a part of the image and write it to a new avi file... even though the extracted image is something like 620 x 300, when I play the avi (or get avi info), it says the avi has resolution of 720 x 480. I've tried creating an IMAQ, then using the set image size sub-VI to set the image to the size I want and the image shows up with the right resolution but the resulting avi has the wrong resolution, so my sub-videos are distorted. Is there some way to set the resolution of the avi other than by writing an image of that resolution? I'm using the compression filter DV Video Encoder... would that make any difference?
Thanks!
Kelly

Hey Kelly,
As far as the different codecs that are available, it all depends on what type of filter you want to use. They vary so widely that it is hard to say that one is better than another. Also, it depends on what type of compression that you want to use will also determine which codec you will want. Some use lossy compression and some use lossless compression. With lossy, you will lose some data when it compresses, but lossless will not. Lossless on the other hand will produce large data files, as it can only compress a certain amount without losing data.
One thing that you might want to consider is using some of the Vision functions to track changes in pixel values from one image to the next. There are a lot of different processing that you can do on your images before you store them to file by using the NI Vision functions. Other than that, you might have to just play around with the different codecs to find which one will work best for you.
Let me know if you have any further questions or concerns. Thanks, and have a great day.
Regards,
DJ L.

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