1527295 - Firefox doesn't play some BBC videos

Status: NEW

(Core :: Audio/Video: Playback, defect, P2)

Description

[Camelia Badau [:cbadau], Desktop QA]

Affected versions

• Firefox 65.0.1-build 2 (buildID: 20190211233335)
• Firefox 66 Beta 6
• latest Nightly 67.0a1

Affected platforms

• Windows 7 x64
• Windows 10 x64
• macOS 10.13

Steps to reproduce

1. Launch Firefox.
2. Go to https://www.bbc.com/news/world-us-canada-47207411 and play one video from this page.

Expected result

• The video is played back properly.

Actual result

• The video doesn't play.
• I received the following error in Browser Console:

XML Parsing Error: syntax error
Location: https://emp.bbc.com/emp/SMPj/2.23.12/iframe.html
Line Number 1, Column 1:
AbortError: The fetching process for the media resource was aborted by the user agent at the user's request

Regression range

• It is not a recent regression since the issue is also reproducible on Firefox 60. I will determine the regression range ASAP.

Additional notes

• This is an intermittent issue.
• The videos work on Google Chrome.

Comment 1

[Alex Chronopoulos [:achronop]]

A quick note that I am on OSX latest Nightly and playback works here for that page. I get the following error in the console, which is the same as the one mentioned in the description, without the AbortError message.

XML Parsing Error: syntax error
Location: https://emp.bbc.com/emp/SMPj/2.23.12/iframe.html
Line Number 1, Column 1: iframe.html:1:1
XML Parsing Error: syntax error
Location: https://emp.bbc.com/

Comment 2

[Vlad Lucaci, Desktop QA (:vlucaci)]

Hello,

This issue has a regression range :
https://hg.mozilla.org/integration/autoland/pushloghtml?fromchange=b15134c683ba5b2b05554ea6e4c358bd2108028d&tochange=c4cd222f9e583b7453b9076e57d6f21af2b76c3e

It would seem that the issue that is causing this regression is Bug 1509842.

Comment 3

[Ryan VanderMeulen [:RyanVM]]

(In reply to Camelia Badau [:cbadau], Release Desktop QA from comment #0)

Regression range

• It is not a recent regression since the issue is also reproducible on
  Firefox 60. I will determine the regression range ASAP.

(In reply to Vlad Lucaci (:vlucaci) from comment #2)

It would seem that the issue that is causing this regression is Bug 1509842.

These statements appear to contradict each other?

Comment 4

[Ryan VanderMeulen [:RyanVM]]

Unless bug 1376873 "fixed" this issue and then bug 1509842 re-broke it? So somehow tied to AGC? Either way, we should probably try to find a regression range with the media.getusermedia.agc_enabled pref forced to true.

Comment 5

[Paul Adenot (:padenot)]

This page does not even remotely touch the code affected by this pref change. This page also does not use WebRTC at all.

Comment 6

[Vlad Lucaci, Desktop QA (:vlucaci)]

Hello,

I tried multiple times and went with the regression as far back as Firefox 4.0 and did not manage to get a constant pushlog out of it.

I get different good/bad dates, possible

Seeing as how the issue is intermittent( not with 100% repro rate ) it may have affected my previous results and that is why our comments seem to contradict in the 1st place.

Issue is not a regression.
Will be clearing the NI requests for me and Camelia.