Intermittent H.264 frame rate drop after installing 1.1
|Reported by:||Moolicious||Owned by:|
After installing Perian 1.1, I am now seeing intermittent drops in playback frame rate while watching H.264 content in QuickTime Player. This is very noticeable with 1080p movie trailers from apple.com. During scenes with a lot of motion, the playback rate will drop from 24fps down to 16 or 12 FPS for several seconds at a time. If I uninstall the Perian components from the preference panel, or go back to 1.0 this problem goes away completely. I do not see any noticeable spikes in CPU usage during the periods where the frame rate drops. Playing back the movie at half size does not make a difference.
My system is a 2.2Ghz Santa Rosa MacBook? Pro with 4GB RAM running 10.5.1. I saw this problem with both QuickTime 7.4 and 7.4.1. I've trashed my Perian preferences, removed all QuickTime components and rebooted with no effect. I've attached my system profile to this ticket.
Let me know if I can provide any additional details.