476811 - A "waiting" event isn't fired when playback freezes for lack of data

Status: VERIFIED FIXED

(Core :: Audio/Video, defect, P2)

Description

[Justin Dolske [:Dolske]]

When playing a video, if it's consuming buffer data faster than the network is providing it, eventually the playback freezes because it runs out of data. The network is still active, it's just not sending bits fast enough.

The video spec says a "waiting" event should be fired when "Playback has stopped because the next frame is not available, but the user agent expects that frame to become available in due course.".

This event doesn't ever seem to fire.

I wrote a little PHP script to trickle out an Ogg at a slow rate, and confirmed that an event listener never gets a "waiting".

http://dolske.net/mozilla/tests/video/slowsend.php?rate=64

The spec also seems to says that "waiting" can be fired during seeks (4.8.10.10), I don't see it happen there either. I do see "seeking" and "seeked" events, which are an acceptable workaround.

Comment 1

[Robert O'Callahan (:roc) (email my personal email if necessary)]

We should provide this, it's fairly easy.

Comment 2

[Robert O'Callahan (:roc) (email my personal email if necessary)]

Attachment: fix

Not sure how to test this without locking up httpd.js...

Comment 3

[Robert O'Callahan (:roc) (email my personal email if necessary)]

Pushed http://hg.mozilla.org/mozilla-central/rev/81ce9460e316

Comment 4

[Robert O'Callahan (:roc) (email my personal email if necessary)]

http://hg.mozilla.org/releases/mozilla-1.9.1/rev/1ca66ced33f5

Comment 5

[Aaron Train [:aaronmt]]

Verified FIXED on 1.9.1 branch and 1.9.2 trunk

Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.5; en-US; rv:1.9.1pre) Gecko/20090604 Shiretoko/3.5pre

Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.5; en-US; rv:1.9.2a1pre) Gecko/20090604 Minefield/3.6a1pre