[Mp4-tech] how to embedd subtitles inside mp4 file format

[Ravi]

Hi All,
  I need to know, how can I embed the subtitles inside MPEG-4 File Format.
 Do I need to have a seperate track for embedding subtitles.
 If seperate track then how do i sink Audio-Video with subtitles.
 Please guide me ........
 Regards,
 Ravindra Dolas 
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