How to encode frames selectively and write in different video files as per required

[spaul13]

suppose, for example, I have 10 frames, I want to encode 1,2,3 in one video, 4,5,6 in another video and rest in another video. How to achieve this without encoding each of them differently by us. (as that solution will not be scalable) How to change in the code while writing encoded frames into the video file?

How to make the write to happen into multiple video files.

and how to change the sequence of encoding i.e. after 1 how can I possibly encode 4,5 skipping 2,3 after 4,5 done then encode 2,3. How to do this?