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Bug Report - Progressive Download on Firefox 46.0.1 with JW 7.4.0

Dear JW-Dev-Team,

there's a bug in JW 7.4.0 in connection with Firefox 46.

Progressive Download / Pseudo streaming does not start on first play click. It must be stop or seek then the video plays. Chaining back to 7.3.6 it works in Firefox as well. Seems something wrong with header reading. But URL to MP4 works fine directly as browser address in Firefox but not inside player config.

Code:
file: "http://www.webserver.com/media/video.mp4",
label: "720p",
provider: "http",
type: "mp4",

This bug in JW 7.4.0 does not apply to other browser, only Firefox. Chrome, IE, Edge or Nightly 49 works well.

Regards,
Adam

7 Community Answers

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Alex

JW Player Support Agent  
0 rated :

HI Adam,

It is true that we are starting to see an issue with some MP4 files in Firefox with JW 7.4, but it does not appear to happening every time MP4 files are embedded. For that reason, I would ask that you send us a reproduction page including the MP4 you are having issues with.

Thank you.

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info

User  
0 rated :

Of cause, see here: http://www.silberstern.net/videotest/test1.php

You need to use current Firefox 46 32 bit version, Nightly 49.x 64bit and other browsers (32/64bit) seems to work.

It works in Firefox 46 only, if during buffer I do a seek or stop/start event....

There is a similar post in the forum where Firefox + Edge is mentioned...

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Alex

JW Player Support Agent  
0 rated :

Hi there,

We looked into this more after my reply to you on the 13th and it looks to be an issue caused that only happens in Firefox 46. Using Firefox 47 (Beta) or 48 (Dev Edition) does not reproduce the issue. It appears to be similar to an issue that was present in Firefox that was resolved with version 45 as well.

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info

User  
0 rated :

One more hint: When you load JW 7.3.6 it will work further with FF 46 as well, failure starts with JW 7.4.0.

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Alex

JW Player Support Agent  
0 rated :

We’re aware of that as well. We’re not sure what it is about Firefox 46 that doesn’t like some of the changes we made to the player in 7.4, but it would also be counterproductive to spend a lot of resources to figure out something that the browser manufacturer already fixed.

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promofest

User  
0 rated :

Have you spoken with Firefox to fix this issue?

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Alex

JW Player Support Agent  
0 rated :

They have fixed the issue in Firefox 47, which is currently in beta.

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