I have ubuntu 12.04, 32-bit. I've been having this problem for a couple of days now.. Youtube videos are playing in fast forward on google chrome and in slow motion on firefox! I have read some of the suggestions about it. So far I've installed Volume Control and I've changed the Output audio device from HDMI to built-in speakers like someone suggested but I'm still having the same problem. I also saw another suggestion about the different plugins for flash and them clashing but I have no clue how to fix that. Please help? Bearing in mind that I'm a beginner and don't know much about programming at all!
Take a look at this YouTube HTML5 Video Player. It might be flash related since Adobe decided not to keep updated for flash under Linux. Choose to use the HTML5 player instead of the Flash player for most videos.
Also you can try, disabling hardware acceleration in Flash by right clicking the video, and choose Settings. Or you can reinstall your flash plugin.
As Mitch has mentioned, YouTube usually uses Flash, so this looks like a problem with Flash. It happens in multiple browsers, so it is probably not being triggered by user-specific files that are also browser-specific.
Let's see if it's being triggered by user-specific temporary Flash files. Remove them, like this. (This tends to fix a number of Flash performance problems.)
cd; rm -r .adobe .macromedia
Run that command in a Terminal window (Ctrl+Alt+T) while no web browser is running. Then go back into a web browser afterwards to see if there is any improvement.
If that does not help, please edit your question to provide the following information:
If you remember (or as well as you remember): How did you install Flash?
The output of
lsb_release -a; uname -a; dpkg -l | egrep 'flash|gnash|swf|lightspark'. This will reveal information about what Flash plugin(s) you have installed, so if the problem is the result of multiple plugins, this usually provides enough information to lead to a solution.
Is it any different if you try using a different user account? (If you don't have a second account on your Ubuntu system, you can use the guest account, accessible from the login screen. Or you can create a second account for testing purposes.)
I had a similar problem, and it appears to have been fixed after I switched around devices in the Sound Settings window and
For some reason, after I restarted pulseaudio with Alt-F2, the same videos that I was having problems with before seem to load fine. Go figure... Perhaps a
killall pulseaudio && pulseaudio would fix the problem when it happens? I'll look into this the next time I see this issue.