Mavericks and Quicktime

Question

I've just upgraded to Mavericks and find many, although not all, of my Quicktime videos will not play. I tried downloading Quicktime 7 and transfering Quicktime from an old G5 computer but neither worked. Can this be fixed ? If not can I remove Mavericks and go back to Mountain Lion.

Answer 1

Paul, this is what I've done to get everything working in Mavericks.
Start with QT 7.6.6. - http://support.apple.com/kb/DL923
Get Perian, and install it. - http://perian.org
then VLC, - http://videolan.org
DivX - http://divx.com - and the
Flip4Mac package from Telestream - http://www.telestream.net/flip4mac/
This is what I've put into my system and so far I've gotten every file to run just ducky, even my oldest videos.
In System/Library/QuickTime
     ApleIntermediateCodec.component (should already be there)
     AppleMPEG2Codec.component (optional if you paid for it)
     DivX Decoder.component
     Flip4Mac WMV Advanced.component
     Flip4Mac WMV Export.component
     Flip4Mac WMV Import.component
In your Home/Library/QuickTime/
     AC3MovieImport.component
     Perian.component
For AC3 sound that is in most .mkv files, you need the A52Codec.component, here: https://dl.dropboxusercontent.com/u/34821905/A52Codec.component.zip - unzip the file and put the component into the System/Library/Audio/Plug-ins/Components..
Go back to your Perian settings and in the Audio Output button, set it to 'Multi Channel Sound' - Ignore the message Perian puts up and select it.
By doing a 'Get Info' on your files and where it says 'Open With' and default them to the QuickTime 7 and set it so it is the default for all the files of whichever type you use, it should work perfectly. So far I've gotten ALL my old videos to play.
.avi, .mov (with the AC3 sound), .wmv, .flv, .mp4 and .m4v.
Regards,
Deb.
Edited to add, Paul if you're a bit adventurous go get the app caled Pacifist and use it to open your Snow Leopard installer. IIRC, all the codecs can be found in the Extra Installs Package - that is where QT 7 resides on the disk. Using Pacifist you can have it unpack the QuickTime package onto your desktop and then grab those codecs and manually put them into the system folders - although that QT 7 installer you get from Apple should have put everything where it belongs - you never know if something's been changed.