What library for frame-by-frame work with video should I take?

Question

Video processing

In general, Qt has trouble with Multimedia, and it was decided to use a third-party library. It seems like many advise to use FFmpeg. In this connection, I have a question about whether it is possible and difficult to implement what was conceived with its help.

The task does not seem to be difficult. It is necessary not to play the video, but to extract frames by time (every N milliseconds, or every N-th frame), and preferably in both directions (that is, it would be nice to do this step in the opposite direction).

But given that, as far as I understand, codecs work by remembering changes from the previous frame, I'm not sure how possible this is. And is there a similar functionality in any libraries. Ideally, it would be nice to find a documented plus library with similar functionality.

Answer 1

ffmpeg