620715 - Could start playing sooner on live streams

Status: RESOLVED INACTIVE

(Core :: Audio/Video: Playback, defect)

Description

[Jeff Muizelaar [:jrmuizel]]

If you go to this page: http://www.wowzamedia.com/_demo/webm/html5.html in Firefox it takes a couple of seconds for the video to start playing. The same page starts playing nearly instantly in Chrome.

Comment 1

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

I don't see much of a difference between the startup time of video on Chrome and Firefox. How repeatable is this for you?

Comment 2

[Jeff Muizelaar [:jrmuizel]]

(In reply to comment #1)
> I don't see much of a difference between the startup time of video on Chrome
> and Firefox. How repeatable is this for you?

Pretty repeatable. I'll try to get some actual timings. One thing I notice is that Firefox will show the first frame and then wait before actually playing. Chrome starts playing as soon as something shows up.

Comment 3

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

When we don't know the length of the media (as in the live stream case here) we can't make an estimate of the bitrate, and so we won't start playback until we've downloaded for more than 3s (until we consider the "download rate reliable"). That's possibly the delay you're seeing.

That decision is made in nsHTMLMediaElement::UpdateReadyStateForData(NextFrameStatus).

Comment 4

[Nils Ohlmeier [:drno]]

Mass closing do to inactivity.
Feel free to re-open if still needed.