- QuickTime export fixes. Note that QuickTime export still crashes because it tries to open a "codec settings" dialog from the rendering background thread (and not the main/UI thread). One quick fix may be to move the movie export initialization out of the render thread back into the operator function. But a cleaner way would be to get rid of such a carbon/win32 dialog and place the codec settings inside blender interface (additional fields in the output panel as it is currently the case for other file formats ?).