Chrome youtube doesn't play/Twitch plays with no sound

Question

I have OS X Yosemite, Chrome version 40.0.2214.115 (64-bit)

When I open youtube video it loads but I can't play the video. I didn't download any extensions before youtube stopped working correctly (but still there could be an update on extensions currently active which I didn't notice).

• On safari video plays perfect
• Pasting URL on infinitelooper allows me to play the video.
• Incognito mode doesn't play either.
• Chrome flags "Disable hardware-accelerated video decode" is in unavailable experiments.

Tried twitch, it plays but with no sound (both in incognito mode and normal). Safari plays fine.
Vimeo doesn't play either.

Solution

Chrome - Settings - Advance Settings - Use hardware acceleration when available - deselect it.

You may have to restart the browser.

Comments

[Chloe]

Chrome has started to have this problem on Windows after every reboot. I have to turn acceleration off, restart Chrome (it works then), turn acceleration back on, and restart Chrome again.

[Thellimist]

@Chloe Try downloading chrome canary. It'll break more but it may fix this problem. After 3 months you may rechange back to normal chrome

[Chloe]

It's back to not working at all, even if I disable acceleration and restart or if I turn it on. Version 50.0.2661.75 m.

[Connie Chen]

@Chloe works for Chrome 50.0.2661.86 on Yosemite.

[Chloe]

Try removing --audio-buffer-size=2048 from the command line start up options for Chrome. That was the cause of my recent problems.

[theonlygusti]

Okay so this works, but it seems to overheat my macbook a lot. Like, the fan is going much more than before.