After upgrading to iTunes 7, playback of videos purchased from the iTunes store became unwatchably slow and jerky. The video would play for about 1 second, then freeze, then play, then freeze.
The solution was to turn off the Internal microphone in sound control panel under "Input".
Thanks to Wmatthies on the Apple discussion forums for this idea.
I had the same problem with iTunes v7.5.
I resolved it by getting into Quicktime Preferences, Advanced, and unselected all check boxes under DirectX section, those related to video acceleration.
Now it works perfect!
Posted by: Sergio on November 14, 2007 7:50 AMHad the same problem when upgraded to 7.5 - the DirectX solution worked great!
Thx
Posted by: B_Sharples on January 2, 2008 3:11 PMSanity restored. Many thanks.
Posted by: rtm on March 13, 2008 6:52 PMThanks - that Direct X tip fixed my jerky video issue too!
Posted by: Stuart on May 17, 2009 3:16 AMI tried the fix mentioned by shutting off everything under Direct X. It helped the audio become clearer but the video is still jerking. I just also updated iTunes to V9. The video is jerking and the audio and video are not connected. Any ideas
Posted by: jerry on October 18, 2009 3:26 AMJerry, I had the same problem. It's not a fix, but the iTunes videos play just fine on Quicktime.
Posted by: Ed on November 18, 2009 10:29 PMI'm also having the same problem. Slow jerky music videos. I too was also wondering if the videos would play smooth in Quicktime. Is there a way to have a video launch in QT when it's clocked in iTunes?
MacBook Pro 2.4 GHz Intel Core 2 Duo
Posted by: DJ Bobby Steele on December 12, 2009 6:09 AM4 GB 667 MHz DDR2 SDRAM
iTunes 9.0.2
Thanks for the Direct X tip..works like a champ!
Posted by: Greg on February 7, 2010 1:10 PMDirect X tip worked for me too. Thanks a lot.
Posted by: wf on February 9, 2010 1:10 PMDirectX worked fine for me too...thanks for the tip!!!
Posted by: Dev on April 14, 2010 11:41 AMI have the same problem... tried the DirectX fix, but still video is choppy. Do you have to restart the computer? Any help would be greatly appreciated.
Posted by: Matthew on July 15, 2010 4:52 AMI have the same problem but have tried all of the above and still the video is choppy- any ideas
Posted by: Tom Ryan on July 19, 2010 9:31 AM