Tested with: Device: Samsung Galaxy Note 5 (Android 5.1.1) Build: Firefox for Android 44.0a1 (2015-10-05) Steps to reproduce: 1. Go to people.mozilla.org/~nhirata/html_tp/elephants-dream.webm Expected results: - Video automatically starts to play Actual results: - Video doesn't start to play automatically (even if 'Allow autoplay' pref is enabled) - A black screen is displayed. After tapping the screen, video controls are displayed - After the 'Play' button is tapped, nothing happens. Note: - also h.264/mp4 videos are not working either on http://people.mozilla.org/~atrain/mobile/tests/media.html - regression: good build: 03-10 bad build: 04-10 pushlog: http://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=0010c0cb259e28faf764949df54687e3a21a2d0a&tochange=8464f02a2798cf9ff8759df712f2c77ec0b15d23

Can we get a regression range on inbound or fx-team ?

regression inbound: good build: 1443806677 bad build: 1443807337 pushlog: http://hg.mozilla.org/integration/mozilla-inbound/pushloghtml?fromchange=fd1540ba641fae147d54c2ee690513f0646b7930&tochange=c917988efd78a3f082be29d388b87fdb194f592d

Teodora - Your changeset is a backout of bug 1186745. Bug 1186745 has landed again. Can you retest?

Tested using: Devices: Nexus 6 (Android 5.1.1) and Moto X (Android 4.4.4) Build: Firefox for Android 44.0a1 (2015-10-07) 1. Go to people.mozilla.org/~nhirata/html_tp/elephants-dream.webm => video starts to play 2. Go to http://people.mozilla.org/~atrain/mobile/tests/media.html => h.264 videos are still displayed blank

This is irritating. We need to get it fixed. Why didn't tests catch this?

This looks like a regression from bug 1209850. We never reschedule an update once an update was scheduled before the decoder's initialization was done.

Comment on attachment 8675185 [details] [diff] [review] 0001-Bug-1211443-Drop-scheduled-update-if-decoder-initial.patch Review of attachment 8675185 [details] [diff] [review]: ----------------------------------------------------------------- Good catch. Sorry for that.

I don't see how that could have prevented YouTube to work however. Isn't MSE enabled on android?

Verified as fixed on latest Nightly build (10-20-2015), on Samsung Galaxy Note 5 (Android 5.1.1)

Does the fix apply to Firefox 45 on Android 4.4.4? If it should I suggest checking the video on page https://cdi2tp.math.tecnico.ulisboa.pt/texto/4 This video works on any current desktop browser or other mobile browsers for Android 4.4.4.

That particular video WFM, but I would recommend filing a new issue if you're still having video problems on that site Joao.