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Client review not working with Firefox


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It seems that in client review, I'm not able to play mp4 with firefox. Got this feedback from our client, and I tested it by myself and can confirm that. With Chrome it works well. Is this known problem? 

Ftrack version is




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I have newest version of firefox and it wont work. I have uploaded these mp4 to ftrack with python-api. 

Output arguments for ffmpeg i have used:

-ac 2 -b:v 2000k -c:a aac -c:v libx264 -pix_fmt yuv420p -g 30 -vf lut3d="{}" -vf scale="trunc((a*oh)/2)*2:720" -b:a 160k -vprofile high -bf 0 -strict experimental -f mp4'


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Does it work with videos encoded by us (If you drag a video file to the "Versions" tab in the sidebar of the web interface, or use the `encode_media` method in the API)?

To troubleshoot this further, it might be easiest if you reach out to us via email to support@ftrack.com to help us reproduce the issue.



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