Most commercial video projectors don't use standard HD resolutions. For example, very common resolutions include 1280x800, 1920x1200, and 1024x768 (which vMix supports). These projectors are commonly used for business and educational presentations and also used by Houses of Worship. Is there a technical reason why these other resolutions are not supported in vMix? I think there is a large market that would like to use vMix (myself included). Common video resolutions can be found at http://www.projectorcentral.com/projectors.cfm (pull down box for resolutions). Thanks. Cheers, James.

Martin, thanks for your reply and insights. As a 'newbie' to both vMix and video mixing under Windows, I did not understand that the output is scaled in the manner you described. Normally, in my application, I would neither be expecting to stream the output or record it--just send it to a video projector for live presentations.

I was thinking of vMix as a switcher and not as a scaler. Now that I understand that, I still have issues. For example, I ran the following experiment: My output monitor has a resolution of 1280x1024. When an image with that resolution is sent to the vMix output, there is not any scaling and the image fills the output frame. However, when I cut over to an image with a resolution of 1024x768, I would expect that the image would be small and centered in the 1280x1024 frame. But as you pointed out, the image is scaled and fills the entire output frame. Since the aspect ratios are different, the image is distorted (circles become ellipses). Image quality is also lost due to the scaling. In some cases, the ability to scale on the fly is advantageous, but in other cases that is not desired. The scaling option on my nVidea card was set to off, but the images still were scaled somewhere.

An analogy: I have always driven a car with a manual transmission. I can't stand driving automatic cars that decide what gear the car should be in. I like to have the same control over my videos. Now either vMix or Windows (I'm not sure which one) has decided to scale the image to fill the output display.

Does anyone have any suggestions? I think I have decided that Windows and/or vMix is not the solution I am looking for. There is a lot of potential, and I'm sure for the applications that it was designed for it perform superbly. I think vMix would be a great fit for me if I could control the scaling (such as having a tick-box for scaling or straight pass-through).

If I've said anything out of line, just remember that I am a 'newbie'! However, insight or corrections from others would be appreciated!

James