Embedded video stutter only in Safari

Question

Level 1

4 points

Embedded video stutter only in Safari

I have a pretty strange, difficult to pinpoint issue. I have a website http://www.andy-lambert.co.uk that contains videos embedded via Vimeo in a lightbox stack. On the pages that contain videos (e.g. http://www.andy-lambert.co.uk/showreel.html ) the videos play perfectly in Firefox and Chrome.

In Safari however (but only on SOME computers, including mine), there is a noticeable stutter or lag on the videos (most noticeable on the MasterCard "goalkeeper" video). However, if you click on the full-screen button the stutter disappears. Also, when a stuttering video is playing in the Lightbox, if you drag the whole window down so that only half the video is visible the stutter disappears again. Or alternatively if you make the whole window small the stuttering stops (once it gets to about 850 pixels wide or smaller). Very strange.

I'm using a MacBookPro mid 2015 with a AMD Radeon R9 M370X 2048 MB graphics card

Mac OS Sierra 10.12.6

Safari 12.0.1

Any thoughts or suggestions would be much appreciated!

Thanks!

MacBook Pro Retina (2015 and later)

Posted on Dec 10, 2018 11:21 AM

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Answer 1

Eric Root

Level 10

685,233 points

Dec 10, 2018 1:27 PM in response to Laszlo K

Try setting up another admin user account to see if the same problem continues. Please post back on whether or not this worked. Also try the Safe Mode. Please post back on whether or not this worked.

Isolating an issue by using another user account

Safe Mode - About

If it works in the Safe Mode, try running this program when booted normally and then copy and paste the output in a reply. The program was created by Etresoft, a frequent contributor. Please use copy and paste as screen shots can be hard to read. Click “Share Report” button in the toolbar, select “Copy to Clipboard” and then paste into a reply. This will show what is running on your computer. No personal information is shown.

Etrecheck – System Information

If the log won’t post, try posting it here and provide a link in a reply Pastebin

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Answer 2

Laszlo K Author

Level 1

4 points

Dec 10, 2018 4:29 PM in response to Eric Root

Hi Eric

Thanks so much for your reply.

I tried creating another user account but the problem still persisted.

However, in Safe Mode, it seemed to be OK – I wasn't able to detect any of the stuttering on embedded videos in Safari.

I ran Etresoft and this is what the report said:

https://pastebin.com/LwnLsgMH

Thanks!

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Answer 3

Eric Root

Level 10

685,233 points

Dec 10, 2018 5:42 PM in response to Laszlo K

You are welcome. Try going to Safari/Preferences/Extensions and disabling all extensions. Quit/reopen Safari and test. I don't see anything else that appears abnormal. The report stated you had adware installed, but didn't show any, which is unusual.

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Embedded video stutter only in Safari

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