RemoveMPEG4MetaData is a tool to erase (rather than hide) metadata from MPEG4 files. It is written in Objective C and has no external dependencies
git clone git://github.com/mikemcquaid/RemoveMPEG4MetaData.git
cd RemoveMPEG4MetaData
xcodebuild # or make -C RemoveMPEG4MetaData/
RemoveMPEG4MetaData [input_file.mp4] [output_file.mp4]
RemoveMPEG4MetaData is licensed under the GPLv3 License. The full license text is available in LICENSE.txt.