QuickTime 7.4.5: no video/audio playback, fixes; problems installing
Check for problematic third-party plug-ins.
No video/audio playback, fixes Users continue to report an inability to playback certain media after updating to QuickTime 7.4.5. MacFixit reader Amy, for instance, writes:
"I just did the software update to QuickTime 7.4.5 and now I only get a white screen, no audio and no video. Everything was fine before the update...now, I can't do anything. I have to have these videos done for an appreciation dinner for our mission and I am unable to accomplish anything."
The first thing you should do when experiencing similar issues is check in the following directories:
- /Library/QuickTime
- /Library/Internet Plug-ins
- ~/Library/QuickTime
for any third-party add-ons that could be interfering with playback. Remove any third-party items and restart then check for restored playback.
Second, if video files were encoded with older versions of iSquint, they may not be playable with the new version of QuickTime. Download the latest edition of iSquint, which includes a tool called "Debreaker" that can repair the problematic video files. Try dragging the unplayable videos onto this droplet application.
Problems installing update if you are having problems installing QuickTime 7.4.5, either from Softwre Update or the standalone update, try deleting the folder /Library/Updates/QuickTime then re-attempting the update.
Feedback? Late-breakers@macfixit.com.
Previous coverage:
- QuickTime 7.4.5: app launching problems: try reinstallation; more
- QuickTime 7.4.5 released: Spotlight crashes
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