[pedrocr]

Not sure how that would work. You have a thread that's decoding the frames 1 minute in front of where playback is, so if you're not decoding full frames and storing them until you need to display them what is that thread doing?

[the8472]

transcoding or video editing in slices is a common application.

you cut the video into a handful of parts at keyframes, process the parts individually in a streaming manner and then splice the partial results together.

If we're talking about playback then creating seeking-thumbnails could similarly benefit from parallel processing.