Notes on using the mpeg-4 mux

The mpeg-4 file format includes an index which lists the time and location for each access unit (picture) in the file. To build this index, the mux filter needs to know both the timestamp of each access unit and also the boundaries of each access unit. The multiplexor does not analyse individual elementary stream structures, so it needs this information to be supplied correctly in the DirectShow IMediaSample properties:

6 April 2009