[ Outline ] · Standard · Linear+ Tutorial [Premiere], Compositing...

Right (its back!!!) Today were going to take two separate pieces of video, you can see them in the view windows here:

(IMG:http://www.geocities.com/fookwit02/1cupandbottle.png)

And combine them into one video stream, using the chroma-key transparency feature of premiere. Heres a sneak preview of the final result:

(IMG:http://www.geocities.com/fookwit02/12finalproduct.png)

so to start with we need to take our two video streams and place them on the time line. As we want both the cup and bottle to exist in the same space at the same time you need to layer them one on top of the other as shown here:

(IMG:http://www.geocities.com/fookwit02/2overlaid.png)

Next you need to open out the "Transform" effect in the "video" section of the effects panel. select the "clip" option and do the standard drag & drop onto the video in "video2".

(IMG:http://www.geocities.com/fookwit02/3clip.png)

The clip effect will now appear in the "effect controls". You'll need to click on 'Setup' now.

(IMG:http://www.geocities.com/fookwit02/4clip2.png)

Another window will popup. First drag the slider (highlighted as '1') to about 49% or 50% to block out the side of the frame we want the other video to take. Then click on teh solid block highlighted '2'.

(IMG:http://www.geocities.com/fookwit02/5clip3.png)

Change the colour to match the example below - a lovely green!:

(IMG:http://www.geocities.com/fookwit02/6color.png)

then click 'ok' and 'ok' again to return to the main premiere window.

thanks for your comments guys - i've got all the video shot for the next tute but just need to find the time to upload and write it... onto seyedaddy's question. a simple mix composite like this is the most basic chroma key you can do - the usefulness of it is limited by what you want to achieve, say you have a scene where twins are arguing with each other with a stationary camera you could film both "twins" using one person and merge the shot in the edit to give the impression of there being two... or perhaps you want to include something else in the scene - in the stage where we crop the video in half you could easily make it a cube and insert and object into frame.

as i say its not ideal and a proper chroma key tutorial would be a good idea for the next tute i think - using that we do away with the mixing of two whole images and instead use a blue or green screen whilst filming to create an inbuilt alpha channel in the scene to knock out in the edit... watch this space!

Awai.