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youtube videos stuttering/lagging

Posted

This might be asked before. Internet explorer 11 plays youtube videos without any lag or stuttering issue at all. but as I played the same video in FF, I immediately notice stutter. using FF ver64 on win8.1 64bit. Tried enble/disable HW acceleration, extensions, but no joy.

Is Mozilla aware of this?

This might be asked before. Internet explorer 11 plays youtube videos without any lag or stuttering issue at all. but as I played the same video in FF, I immediately notice stutter. using FF ver64 on win8.1 64bit. Tried enble/disable HW acceleration, extensions, but no joy. Is Mozilla aware of this?

Chosen solution

YouTube prefers a codec that can put heavy stress on your CPU called VP9. You can hide Firefox's ability to handle VP9 so that YouTube gives you H.264/MP4 instead and see whether that resolves it. This extension will do the job:

https://addons.mozilla.org/firefox/addon/h264ify/

Any difference?

Read this answer in context 2

Additional System Details

Installed Plug-ins

  • Shockwave Flash 31.0 r0

Application

  • User Agent: Mozilla/5.0 (Windows NT 6.3; Win64; x64; rv:64.0) Gecko/20100101 Firefox/64.0

More Information

jscher2000
  • Top 10 Contributor
8699 solutions 71098 answers

Chosen Solution

YouTube prefers a codec that can put heavy stress on your CPU called VP9. You can hide Firefox's ability to handle VP9 so that YouTube gives you H.264/MP4 instead and see whether that resolves it. This extension will do the job:

https://addons.mozilla.org/firefox/addon/h264ify/

Any difference?

YouTube prefers a codec that can put heavy stress on your CPU called VP9. You can hide Firefox's ability to handle VP9 so that YouTube gives you H.264/MP4 instead and see whether that resolves it. This extension will do the job: https://addons.mozilla.org/firefox/addon/h264ify/ Any difference?

Question owner

high end pc with no noticeable load on cpu but still suffer lag. it seems that was the cause. anyway thanks so much jscher2000

high end pc with no noticeable load on cpu but still suffer lag. it seems that was the cause. anyway thanks so much jscher2000
James
  • Moderator
1596 solutions 11250 answers

Helpful Reply

The new Firefox 64.0.2 update may help with the Youtube stuttering.

https://www.mozilla.org/firefox/64.0.2/releasenotes/

The new Firefox 64.0.2 update may help with the Youtube stuttering. https://www.mozilla.org/firefox/64.0.2/releasenotes/

Question owner

finally they fixed it .....thanks James.

finally they fixed it .....thanks James.