Using 'seek' to only download a portion of a file.

[justsomeguy]

Is it even possible to seek to a specific point of an FLV/M4A file and begin your download there? For example, say you wanted only the last 2 minutes of a YouTube clip, rather than the entire 10-minute file.

Lots of websites provide the ability to jump to a specific point in a movie or show via a little screencap of that particular timeframe, but how would you accomplish jumping to that point with any of the tools available like rtmpdump?

I just assumed it was as simple as passing along a certain variable in the address, but evidently not? Any help is appreciated!