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Using FCP to create an bump with an alpha channel
How can I create an animation or bump with an alpha channel in FCP.
The final product is going to be a QT file that is placed on our SAN server and then rolled in live into a shoot that we will be doing.
We are using BUGtv to playback the QT clips.
I want to be able to create a bump element with a transition the will wipe back to the studio, but I don’t want my TD to have to match the wipe of the element, I want to create an alpha channel or put it over “Negative Black” for him to pull a key and when the element is over is goes bay to the studio automatically.
Thanks;
Steve Cohen
Editor
O2 Media Inc. -
3 Replies
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Steve,
Most transitons on vision mixers come from a hard disk store or two Profile channels or similar.
The only codec that supports an alpha in FCP is the animation codec. So, either kick out a tiff/targa image sequnce that a hard disk recorder can playback or make a key & fill for a synced two channel replay. I doubt if your replay cahnnel will be able to play an animation movie – the card won’tt either.Peter
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Thanks Peter;
After doing a little more reading and testing I found out that FCP will treat the black background (being the area that does not have any video coving it) as an alpha channel if you export the clip as a Quicktime Conversion using “None” for Compression Type and “Millions +” as Compressor depth.
This will import back into FCP as a single movie clip with the black space being the transparent.
Thanks again;
Steve Cohen
Editor
O2 Media Inc. -
…and you sequence should NOT be rendered before you export and you should no video or graphics in Video track 1.
Jeremy
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