Closed Bug 1447995 Opened 4 years ago Closed 4 years ago

The length of time and seekbar for WebM videos is automatically modified


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




Tracking Status
firefox-esr52 --- wontfix
firefox59 --- wontfix
firefox60 --- fix-optional
firefox61 --- fix-optional


(Reporter: csasca, Unassigned)


(Keywords: regression)


(1 file)

Attached image bug.gif
[Affected versions]:
Latest Nightly 61.0a1 Build ID: 20180321220044
Firefox Beta 60.0b5
Firefox 59.0.1 RC

[Affected platforms]:
-Windows 10 (x64) 
-Windows 7 (x64) 
-Ubuntu 16.04 (x64) 
-macOS 10.12.6

[Steps to reproduce]:
1.Start Firefox
2.Open the link
3.Right-Click on video and activate loop
4.Seek the video at the last seconds and observe the behavior.

[Expected result]:
The video starts from the beginning without any issue.

[Actual result]:
The video's time length and seekbar are doubled and only the first half of the seekbar is functional.

[Regression range]:
It seems that this is an old regression.
Last Good:2014-09-10
First Bad:2014-09-11

[Additional notes]:
-The issue is intermittent.
-The issue is reproducible without activating loop, but if it is activated, it is easier to spot the issue, as the video doesn't stop at the end.
-I found another issue with a Flac where after doing the same STR from above, the streaming starts from 0:40 seconds.
Here is the link for the Flac file under test (!%20stern%20and%20wild.FLAC)
I cannot reproduce this on Nightly 66. Assuming it has been fixed in the meantime, but I don't have the time to figure out what fixed it.
Closed: 4 years ago
Resolution: --- → WORKSFORME
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