miguelg@, can you reproduce this?

zqzhang@, does it happen on other websites?

Yes, pretty consistently, feel free to come and check it out.

It's reproducible on dailymotion.com and your autoplay test page (http://mounirlamouri.github.io/sandbox/autoplay/test.html)

Also found some weird behavior for vine.com. Will file another bug.

Bumping to P1 for avayvod@ to investigate.

zqzhang@ and miguelg@, can you reproduce this on M54?

I can't reproduce on M54.

Something to keep in mind: some changes happened in M55 that just got merged in M54. If these changes are the cause of the breakage, it might break M54 later.

I am also unable to repro in 54. For now at least. Can you ping this when the potentially problematic 54 makes it to beta?

I'll try 54 branch head later today and see if it repros.

Reproducible on 54.0.2840.35 (current M54 branch head).

I can't reproduce at https://project-1912052061267295165.firebaseapp.com/without-hack-timer.html. My mac's USB refuses to work today :/ I would suggest bisecting the Beta to find the offensive CL. IIRC, the change landed by Dale to fix the previous issue didn't have this problem when I tested so I doubt it is what's caused the problem.

Re: #c2 it's a long walk.

I'll do the bisect. Suspecting https://codereview.chromium.org/2308893002

Confirmed https://codereview.chromium.org/2308893002

sandersd@, can you PTAL :)

The suspected CL is small and clearly more correct. However, it was part of a larger series of interdependent changes which may be related.

A copy of the chrome://media-internals log during this behavior would be very helpful; I will attempt to reproduce and gather that.

This is the pause timer firing, doesn't happen if you wait longer than 5 seconds between the background and resuming step. We need to invalidate the pause timer during play().

https://codereview.chromium.org/2363813002

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/4619cd0ee861c0e15e0ed49e99f633f01b96fbdd

commit 4619cd0ee861c0e15e0ed49e99f633f01b96fbdd
Author: dalecurtis <dalecurtis@chromium.org>
Date: Thu Sep 22 21:39:10 2016

Clear pause timer upon start of a playback.

Otherwise this may nuke intentional playbacks from the media session.

BUG= 649271 
TEST=playback doesn't pause after 5 seconds if play occurs.

Review-Url: https://codereview.chromium.org/2363813002
Cr-Commit-Position: refs/heads/master@{#420468}

[modify] https://crrev.com/4619cd0ee861c0e15e0ed49e99f633f01b96fbdd/media/blink/webmediaplayer_impl.cc

Your change meets the bar and is auto-approved for M54 (branch: 2840)

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/276bb71f945600d1f6a287882588517d25f7282f

commit 276bb71f945600d1f6a287882588517d25f7282f
Author: Dale Curtis <dalecurtis@chromium.org>
Date: Fri Sep 23 00:55:17 2016

Merge M54: "Clear pause timer upon start of a playback."

Otherwise this may nuke intentional playbacks from the media session.

BUG= 649271 
TEST=playback doesn't pause after 5 seconds if play occurs.

Review-Url: https://codereview.chromium.org/2363813002
Cr-Commit-Position: refs/heads/master@{#420468}
(cherry picked from commit 4619cd0ee861c0e15e0ed49e99f633f01b96fbdd)

Review URL: https://codereview.chromium.org/2367633002 .

Cr-Commit-Position: refs/branch-heads/2840@{#506}
Cr-Branched-From: 1ae106dbab4bddd85132d5b75c670794311f4c57-refs/heads/master@{#414607}

[modify] https://crrev.com/276bb71f945600d1f6a287882588517d25f7282f/media/blink/webmediaplayer_impl.cc

 Issue 649286  has been merged into this issue.

Works as per expected behavior.
Issue is verified on Latest M55 Build on trunk

Works as per expected behavior.
Issue is also verified on Latest M54 Beta Build 

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/276bb71f945600d1f6a287882588517d25f7282f

commit 276bb71f945600d1f6a287882588517d25f7282f
Author: Dale Curtis <dalecurtis@chromium.org>
Date: Fri Sep 23 00:55:17 2016

Merge M54: "Clear pause timer upon start of a playback."

Otherwise this may nuke intentional playbacks from the media session.

BUG= 649271 
TEST=playback doesn't pause after 5 seconds if play occurs.

Review-Url: https://codereview.chromium.org/2363813002
Cr-Commit-Position: refs/heads/master@{#420468}
(cherry picked from commit 4619cd0ee861c0e15e0ed49e99f633f01b96fbdd)

Review URL: https://codereview.chromium.org/2367633002 .

Cr-Commit-Position: refs/branch-heads/2840@{#506}
Cr-Branched-From: 1ae106dbab4bddd85132d5b75c670794311f4c57-refs/heads/master@{#414607}

[modify] https://crrev.com/276bb71f945600d1f6a287882588517d25f7282f/media/blink/webmediaplayer_impl.cc