Hello, I am new to stop motion animating and found this site to be a great resource to start learning. However, there are few things I am still confused about. For example, I like the idea of working with green/blue screens and using compositing to make certain sets. However, when I read topics of people doing this using various programs (such as After Effects) I aways wonder if they are working on a video file, or compositing frame by frame. To clarify, imagine if I was shooting a scene that had nothing but a puppet on a blue screen. When I have the whole scene captured, would I then export these frames as a video file and next import the video file to After Effects and key out the blue screen? Or would I import frame by frame to photoshop/any photo editor and remove the blue screen? Or perhaps it is possible to select all photos at once and remove the blue screen?
Sorry if this is a common question, I tried searching these forums but had little luck.
Thanks for any help!
An application like After Effects will do the compositing as a movie file, no need to do it frame by frame.
You load the whole image sequence or movie file into AE and have it on the timeline. Then you select the shades of green or blue you want to key out, and apply that to the whole sequence.
Sometimes you may find a few frames that need individual attention, if the puppet turns to different angle and reflects more green or something, but the idea with AE or editors like Final Cut or Premiere which can do some keying is that you do all the frames at once.
Photoshop is really made to do a single image at a time, so with that you might have to do the keying frame by frame. PS Extended does have a moving image mode where the whole image sequence is loaded in, but I haven't really used that and don't know if it actually can apply an effect to all the frames or not. I use TV Paint which is designed to handle the whole movie, like AE, so I stick with that for my post production and only use PS for still images.