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Camera move and Alpha Channe…suggestions??
I have a video wall box with a left side, front view, and right side. I have a camera move that is a push in on one of the video screens (720×480 at full frame) then the camera pulls back in space, does a turn to the right and pushes in to another video screen on the “right” side of the video wall box. The deal is I need that box to be an alpha channel, in order occupany any given video from a switcher. Any ideas of the best way to do this. Im thinking a black and white version of the camera move animation, then just luma it?? any ideas
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3 Replies
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I guess it would help to know who wants to receive your output, what format they need it in for their equipment?
At the least, it sounds a little strange: if you don’t carry out the 3D movement on the display footage then someone will have to do that later – and how will they match your movement …? Just having an alpha channel and no rendered DVEd footage doesn’t sound like it will produce interesting results.
Are you sure you have a proper brief from the technical end user …?
Or maybe I’ve just missed what you’r asking …
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Its a targa sequence, rendered out to output from a chyron that will then be placed into a video switcher. Right all the movement will already be done. All I know it needs alpha. I already figured one out with a black and white comp with a camera move, then used has an luma inverse on the main comp. Little confusing I know, i was just curious the best way or any thoughts to get an alpha channel out of section of the main comp with a camera move?
thanks
jon -
If you output to 32bit targa sequence, and select output rgb+alpha then your targa sequence will have alpha channel included, with the non-picture parts of your frames transparent. Pretty well any Chyron (or other character generator) + video mixer /switcher combo should allow that to be keyed over background footage.
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