1498321 - It takes time for play button to become effective to start the movie

Status: NEW

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

Description

[Alice0775 White]

+++ This bug was initially created as a clone of Bug #1498291 +++

I notice that the performance/responsiveness problem when test the bug 1498291.

If you click the play button immediately after it is drawn, the movie would not start.
It is necessary to click the play button approx.10 seconds after it is drawn.
(down stream 600kbps(5MB/s) ADSL)

The problem started since Firefox57.

Reproducible: always

Steps to reproduce:
1. Open http://ec2-54-193-19-209.us-west-1.compute.amazonaws.com/demo/
2. Wait for tab spinner stopping and drawing play button.
3. Click on the play button

Actual Results:
Movie would not start

Expected Results:
Movie start

Regression window:
https://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=c7c96eebbcb91e5e0c8ef0dbbb5324812fa1e476&tochange=c7570eb46382ee56d081e549b484341f400c864b

Comment 1

[Alice0775 White]

Attachment: Screenshot, BAD vs GOOD

Comment 2

[Alice0775 White]

I did a local build and I searched for a regression window by binary search.

Regression Window:
https://hg.mozilla.org/integration/autoland/pushloghtml?fromchange=4a092af42641&tochange=a8e94f30387e

Regressed by: Bug 1390443

Comment 3

[Nils Ohlmeier [:drno]]

For me the video doesn't play at all in Firefox 62 or 64, nor in Chrome 70 on OSX.

Can you please double check that your demo is in fact still working?

Comment 4

[Alice0775 White]

Yes, at least on Windows10, the movie can be start.
However, due to this bug, it needs extra 2 steps since Firefox57.


The Bad build, and Nightly64.0a1 Windows10,
1. Open  http://ec2-54-193-19-209.us-west-1.compute.amazonaws.com/demo/
2. Click Play Button
3. Wait for 30-40sec
4. Then Click Play Button again
5. The movie should start


The Good build, i.e, on Firefox56 Wndows10,
1. Open  http://ec2-54-193-19-209.us-west-1.compute.amazonaws.com/demo/
2. Then Click Play Button
3. The movie immediately start

Comment 5

[Alice0775 White]

And Google Chrome Dev 71.0.3573.0 windows10 works like Firefox56. After click play button, the movie immediately start.

Comment 6

[Nils Ohlmeier [:drno]]

This is really strange. Today the video play right away for me on the same OSX machine. The only difference is that I'm testing today from the Mozilla office WiFi with pretty good, reliable Internet connection. Where my tests yesterday were from a pretty lossy public WiFi with not so great Internet connectivity.

But that would then point to the network or the player not fetching things properly in less then ideal networks.

Comment 7

[Liz Henry (:lizzard) (relman/hg->git project)]

Marking fix-optional for 64. We could still take a patch for 65, and if it's verified and doesn't seem risky, could still take fixes for 64 as well.