Quote:
Originally Posted by Graham M
How would that work?
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Fast forwarding is extremely resource intensive, so instead of fast forwarding the video there is another copy of the same video on the server that is simply a sped up version (containing only every 4th frame) that will give the illusion of you fast forwarding.
It's not that a version runs in parallel, but it's there for when you want to fast forward. When you hit fast forward the stream switches to that video from the timestamp you're on, and when you stop fast forwarding switches back to the normal video at the point you are now.
It's a pretty common solution to remote fast forwarding as the cost implications of doing it properly are far higher as the overall capacity of the same server would greatly reduce when you factor in the fast forwarding overheads. Doing it this way adds an insignificant overhead (changing video within a stream is a trivial command).