1203130 - Flash Player is sometimes requested on YouTube (intermittent)

Status: RESOLVED INCOMPLETE

(Core :: Audio/Video: Playback, defect, P3)

Description

[Maja Frydrychowicz :impossibus (was :maja_zf) (needinfo me)]

So far, this has occurred once in firefox-media-tests. 

Summary of this test run: 6 videos started playback successfully (played first few seconds of each video), then Flash was requested for video KlyXNRrsk4A, then all the videos played entirely (including KlyXNRrsk4A).

Details: scroll down to see 'media_tests.html' and 'gecko.log', under 'artifact uploaded' at https://treeherder.mozilla.org//logviewer.html#?job_id=1127736&repo=mozilla-aurora

Comment 1

[Chris Peterson [:cpeterson]]

I wonder if this is related to bug 1202100, where someone reported YouTube switching from HTML5 video to Flash while the video is playing.

Comment 2

[Ralph Giles (:rillian)]

Can we set up telemetry on MediaSource errors? This may be triggering fallback.

Comment 3

[Jean-Yves Avenard [:jya]]

I could easily reproduce it when mediasource webm was enabled.

There are still a few decoding error occurring and when that happens almost instantly; YouTube switches back to flash.

Comment 4

[Maja Frydrychowicz :impossibus (was :maja_zf) (needinfo me)]

Caught this in automation again: still in 42, and again the same YouTube URL. See https://bugzilla.mozilla.org/show_bug.cgi?id=1182513#c32.

The failing video often includes an unskippable ad at the beginning, which might be why it is able to trigger this failure.

Comment 5

[Jean-Yves Avenard [:jya]]

Almost certainly a dupe of bug 1205911

Comment 7

[Maja Frydrychowicz :impossibus (was :maja_zf) (needinfo me)]

The issue still comes up. Latest example: https://treeherder.mozilla.org//logviewer.html#?job_id=1248282&repo=mozilla-aurora

Comment 8

[Maja Frydrychowicz :impossibus (was :maja_zf) (needinfo me)]

https://treeherder.mozilla.org//logviewer.html#?job_id=2395936&repo=mozilla-central

Comment 9

[Anthony Jones (:ajones, :kentuckyfriedtakahe, :k17e)]

Mass change P2 -> P3

Comment 10

[u597032]

Flash is no longer supported