Hi,
For a test, move components out of the /Library/QuickTime folder to a safe location so the result looks like this:
drwxrwxr-x+ 3 root wheel 102 16 sep 02:52 AppleAVCIntraCodec.component
drwxrwxr-x+ 3 root wheel 102 16 sep 02:51 AppleHDVCodec.component
drwxr-xr-x+ 3 root wheel 102 16 sep 02:52 AppleIntermediateCodec.component
drwxr-xr-x 3 root wheel 102 25 ago 2013 AppleMPEG2Codec.component
drwxrwxr-x+ 3 root wheel 102 16 sep 02:52 AppleProResCodec.component
drwxrwxr-x+ 3 root wheel 102 16 sep 02:52 DVCPROHDCodec.component
drwxrwxr-x+ 3 root wheel 102 16 sep 02:48 DesktopVideoOut.component
drwxrwxr-x+ 3 root wheel 102 16 sep 02:52 FCP Uncompressed 422.component
drwxrwxr-x+ 3 root wheel 102 16 sep 02:52 IMXCodec.component