Use the FPS retrieved while demuxing a TS file in order to mux the eleme...

Hi,
two features have been added to the project:
- the ability to convert TS file without sound into MP4 file
- the ability to convert TS file with any FPS instead of a FPS fixed at 20

Can you please review the code? 

It still use the same mechanism to demux and mux the files. I've just extracted the FPS information at the demuxing step to use it in the muxing step.

Regards,
Jonathan.