The navigation speed is mainly depends on demultiplexer.
To facilitate navigation and provide exact frame accurate positioning in the mpeg files we would recommend to index media file. Elecard SDK provides samples how to index file and use index for navigation (Advanced Player sample). The SimpleTrimmer sample illustrate how to use Elecard XMuxer engine for fast navigation through the stream and trim required chunk of the movie.
Elecard Player SDK includes demo version of all required components demultiplexer, decoder, indexator, etc.
More detailed SDK description you can see there
To receive Elecard SDK evaluation please contact Elecard Sales Department firstname.lastname@example.org