616993 - Video timeline scrolls back and forthe

Status: VERIFIED DUPLICATE of bug 485696

(Core :: Audio/Video, defect)

Description

[Ludovic Hirlimann [:Usul]]

On the video linked above, the length of the video isn't guessed properly. So the timeline cursor bumps into the enf of the video area, moves back a bit and bumps again in the end of video. This goes on until the video is completely played.

On my first video view the player thought the video was 24 sec longs, on my second attempt it thought it was 4 sec.

STR
1) Load the above video
2) show video controls by hovering on top of the video

using Mozilla/5.0 (Macintosh; Intel Mac OS X 10.5; rv:2.0b7) Gecko/20100101 Firefox/4.0b7

Comment 1

[Chris Pearce [:cpearce (Not reading bugmail)]]

Does this happen only when the video is uploaded to bugzilla? If you upload it to a webserver which supports HTTP1.1 byte-range requests, or if you play it locally, you should be able to seek to get the duration.

I think what's happening is because bugzilla's attachment.cgi doesn't support byte-range requests, we can't get the duration, and so we assume the duration is the length of time which we've played, which increases as we play more. The timeline jittering on unknown length streams is bug 485696.

Comment 2

[Ludovic Hirlimann [:Usul]]

(In reply to comment #1)
> Does this happen only when the video is uploaded to bugzilla? If you upload it
> to a webserver which supports HTTP1.1 byte-range requests, or if you play it
> locally, you should be able to seek to get the duration.

It doesn't do it when playing locally.