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Full user review
"Handy little tag editor"
This review was originally posted on VersionTracker.com.
Subler is a handy little tag editor for MPEG-4 files. The sparse online documentation says it only works with .m4v files but it works with .mp4 files also. It has a long list of tags that it can add to MPEG-4 files, covering most if not all the tags you would like to add to the file. It has preset lists fo rmovies and TV shows only, though.
The variety of editable tags is much larger than iTunes has, which is quite helpful. Importing into iTunes - you can send the file you are working on directly to iTunes from the application - is a doddle as iTunes respects the added information (and doesn't wipe out the tags it doesn't offer).