QTKit does not enumerate my USB- and virtual cams in 64Bit mode. Is there a workaround?

I have a problem with Quicktime, that means, QTKit. A long time ago I wrote an app,开发者_高级运维 which is using camera devices on Mac OS X. The user could select the camera using a popup box. I populated the device list into a popup box so the user could choose his preferred camera. Now I migrated to 64Bit code. And everything works fine with iSight cam. Audio devices are listed properly, too (including virtual drivers like Soundflower). For my surprise all camera-devices are missing. And QTKit never enumerates the existing cameras. Is there a workaround or does someone know something about this issue?

I encountered the same issue. Haven't found a workaround other than keeping it 32bit. The Quicktime API mailing list has already discussed this here basically stating that the camera device (your camera device) is a Quicktime Component and Quicktime Components are only supported with Quicktime 7 not Quicktime X if I understood this correctly.

So to put it bluntly: Quicktime Components are not supported in 64bit, for whatever reason I don't understand.

Update: another discussion on the quicktime-api-lists also covers this topic here. Search for vdig in the discussion and you'll find statements on the whole 32bit vs. 64bit complications:

Apple has never updated or replaced the VDIG/ SG / QuickTime Component
API to a 64 bit architecture and your VDIG will never show up as a
selectable device under 64 Bit. So your VDIG is screwed, just like
every other Mac 3rd party QT component developer is.

Also, the term QTKitServer pops up, which seems undocumented but is used by Quicktime X in 64bit mode to play movies in 32bit by using Quicktime components.

Maybe QTKitServer is the key?