Flash/Youtube videos - sound out of sync over time -[CHROME]

Hi - i have some problems with videos in Chrome - when i watch videos - the sound gets out of sync from the video over time - in the start of the video the sound is perfect in sync - but after about 7 min the sound plays around 1-3 seconds before the video. it seems like the sound is playing at 100% speed but the video is only playing at 99% speed so the sound slowly gets more and more out of sync - have tried disableling flash in chrome in chrome://plugins but no result - have updated drivers

A/V sync is hard, and there are hundreds of ways to encode a video. Adobe provides guidance on how to best publish content to ensure that it consistently plays back well, but that's an uphill battle.
A direct link to the problem video is the most useful information you could provide in this case, along with details about your system. It would also be useful to know if the A/V sync problem goes away if you disable hardware acceleration, as described in the video troubleshooting guide.
https://helpx.adobe.com/flash-player/kb/video-playback-issues.html
Thanks!

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Welcome to Apple Discussions, m
See if any of the suggestions offered here reduce your sync quality problem enough:
http://discussions.apple.com/thread.jspa?messageID=7089133&#7089133
If, after making certain that your Mac is running well, has plenty of free space on the correct drive, etc., your sync is still not close enough, you can manually re-sync any parts that are unacceptable to you using either QT Pro or iMovie.
If you check carefully, you will see that not even pro video is always perfectly synced. It is a lot of work to get things "nearly perfect," but, with a bit of practice, it doesn't take long to get things "close enough" for me.
I use the same simple process with either QT Pro or iMovie, so you can use whichever you find easiest. Whichever you use, keep the original AV clip safe and *_work on a copy_* in case something goes wrong.
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(1) Copy of the audio track.
(2) Add the audio track copy to the AV file.
(3) Silence the original audio and work on audio copy.
(4) Insert small blank audio clips (or split and slide if using iMovie) if needed to make the audio later.
(5) Cut small bits out of quiet parts (or split and shorten in iMovie) if needed to make audio sooner.
(6) Repeat until satisfied and delete any tracks no longer needed.
(7) Save the adjusted AV file.
(8) Enjoy!
EZ Jim
G5 DP 1.8GHz w/Mac OS X (10.5.7) PowerBook 1.67GHz (10.4.11) iBookSE 366MHz (10.3.9) External iSight

Flash/Youtube videos - sound out of sync over time -[CHROME]

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