Interval playback?

Hello, folks.

I’ve perused the 0.10.0 function list for video- and audio-related
routines, and noticed that there doesn’t seem to be a way to play back a
specified interval (i.e., from time X to time Y), something I would need
for a video-editing program I was going to write for BeOS, and don’t want
to have to spend too much time porting to Windoze. Did I miss something,
and if I didn’t, is support for such planned for incorporation any time