Revision 141 of mp4v2 is now able to write the atom that iTunes looks for to add the HD logo to a movie, TV show or music video. However combining a SD and a HD version to one entry doesn't work yet. Usage: To add the tag: Code: ./mp4tags -H 1 <filename> To remove the tag: Code: ./mp4tags -r H <filename> You check whether the flag is set or not with: Code: ./mp4info <filename> You can also set a variety of other tags with mp4tags, however it si far from future complete. Please note that this is the current development Version of mp4v2, so problems are expected. Please make a backup of any files before you touch them with mp4tags. MP4V2 Homepage: http://code.google.com/p/mp4v2/ OS X builds: http://rouvenwessling.de/mp4v2/mp4tags.zip Linux and Windows build would need to be compiled from source. Please note again that this is a development version and no support is offered.