How to seek?

[onthegit]

Hello, is it possible to seek to a time, in order to determine the byte offset in the webm file?
I do not know much about the webm structure, but once the jswebm is fed with enough data to parse the header, can it determine the offset of the seek time so that a fetch is made only for that part of the webm file and then fed into jsweb in order to extract the chunks that are for that time range?
Thanks.