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Videos sometimes loaded twice in Firefox when played with the timed media handler player
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Description

When I play the videos in https://commons.wikimedia.org/wiki/Category:Neue_Ehrenamtliche via the TMH player (not the player embed on the file description page), the files are sometimes loaded in there entirety twice.

I was only able to reproduce this in Firefox (Firefox 50.1.0 on Linux with ffmpeg 3.1.6).

When playing File:Tutorial 1 Benutzerseite erstellen.webm via the player embedded on https://meta.wikimedia.org/wiki/User:Denis_Schroeder_(WMDE)/UltimateVideoSandbox:

Event Timeline

hoo removed hoo as the assignee of this task.Dec 30 2016, 11:18 AM
hoo created this task.
hoo added a comment.EditedDec 30 2016, 11:21 AM

Note: There are no transcodes for these videos available right now, so the actually uploaded 1080p VP8 is used.