1034081 - VP9 sample video skips the first 5 seconds of content

Status: VERIFIED FIXED

(Core :: Audio/Video, defect)

Description

[Fanolian]

User Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:33.0) Gecko/20100101 Firefox/33.0 (Beta/Release)
Build ID: 20140703030200

Steps to reproduce:

Open http://hg.mozilla.org/mozilla-central/raw-file/d2dac18d0562/content/media/test/vp9cake.webm found in bug 833023#30.


Actual results:

1. On first playback, seek bar goes all to the right.
2. Subsequent playback skips the first 5 seconds of content.


Expected results:

No skipping of content.

regression range for problem 2:
Last good revision: 12ea03a70243 (2013-12-11)
First bad revision: 1ad9af3a2ab8 (2013-12-12)
Pushlog:
http://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=12ea03a70243&tochange=1ad9af3a2ab8

Comment 1

[Fanolian]

The first Nightly that observes issue 1 (seek bar problem) is 2012-12-03 build (rev 8648aa476eef) which predates VP9 implementation. vp9cake.webm plays with audio only on this build and the seek bar goes all to the right. Prior to this Nightly the file cannot be played at all.

Something forgot to mention in original post:
In current Nightly, if I save vp9cake.webm locally and play it in Nightly again, problem 1 is gone but problem 2 persists.

Comment 2

[Alice0775 White]

The problem 2 seems to be caused by Bug 945863

Comment 3

[Jan Gerber]

Attachment: Bug-1034081-Never-seek-before-startTime.patch

Comment 5

[Jan Gerber]

any chance to land this and possibly also push to stable branches?

Comment 6

[Pulsebot]

https://hg.mozilla.org/integration/mozilla-inbound/rev/5569fca75226

Comment 7

[Ralph Giles (:rillian)]

Leaving myself on needinfo to see about uplifting to aurora later this week.

Comment 8

[Carsten Book [:Tomcat]]

https://hg.mozilla.org/mozilla-central/rev/5569fca75226

Comment 9

[Ralph Giles (:rillian)]

Comment on attachment 8633454 [details] [diff] [review]
Bug-1034081-Never-seek-before-startTime.patch

Approval Request Comment
[Feature/regressing bug #]: Bug 945863
[User impact if declined]: Some videos fail to start
[Describe test coverage new/current, TreeHerder]: Landed on nightly last week, passing playback mochitests.
[Risks and why]: I believe risk is acceptable. This codepath doesn't get a huge amount of use, but it's an annoying bug for people who are using WebM with HTML5 video. Rest of the code hasn't changed lately, so chance of side-effect is small and backout in case of regression would be easy.
[String/UUID change made/needed]: None.

Comment 10

[Ritu Kothari (:ritu) (Inactive, please n-i to RyanVM, jcristau, or pascal)]

Comment on attachment 8633454 [details] [diff] [review]
Bug-1034081-Never-seek-before-startTime.patch

This code has been in m-c for a few days and existing mochitests pass. Let's land it on Aurora channel.

Comment 11

[Carsten Book [:Tomcat]]

https://hg.mozilla.org/releases/mozilla-aurora/rev/f38ab249b0ea

Comment 12

[Rakibul Islam Ratul]

I have successfully reproduced the bug in firefox Nightly 33.0a1 (2014-07-03) with windows 10 PRO N (64 bit) 

Verified as fixed with 43.0a1 as comment 0

Build ID:   20150821030204
Mozilla/5.0 (Windows NT 10.0; WOW64; rv:43.0) Gecko/20100101 Firefox/43.0

[testday-20150821]

Comment 13

[Nazir Ahmed Sabbir [:NaSb]]

Reproduced this bug with Nightly 33.0a1 (2014-07-03) by following comment 0 on Linux x64

This Bug is now verified as fixed on Latest Firefox Nightly 43.0a1 (2015-08-27) (Build ID: 20150827030213) and Latest Firefox Aurora 42.0a2 (2015-08-27) (Build ID: 20150827004003)

Mozilla/5.0 (X11; Linux x86_64; rv:43.0) Gecko/20100101 Firefox/43.0
Mozilla/5.0 (X11; Linux x86_64; rv:42.0) Gecko/20100101 Firefox/42.0

As it is also verified on Windows (Comment 12), Marking it as verified!