Hi there,
I was hoping to get some help with a problem with alpha keying. I'm trying to create an Alpha key from a video being played within Arena and going into a vision mixer. So we have the alpha key generated by Arena's Alpha effect on one output and using the same video source as fill on the another output. We can get both into the vision mixer and they appear fine until we use it as an alpha key. The key and fill are out of sync resulting in part of the video disappearing in part and white where it should be video. The main problem is that the sync keeps changing, even when the vision mixer & Arena are timed together. If it was a fixed time we could delay by x frames but as it is changing the delay wouldn't work. We have tried outputing from Arena on the same graphics card & different graphics cards, same issue.
We are outputing 1080i50 as the vision mixer has to have 50i input.
Test video was 30fps, 2 seconds long. We have many different clips that we would like to use this effect on so doing it in Arena is much easier and quicker than re-rendering everything again and playing from another source (plus we don't have another video player)
I've been looking through the forum but couldn't see anything so if anyone has done this or has some ideas on how to fix / work around this issue.
Thanks,