Join m4v HD videos

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flapane

Senior Member
Jul 16, 2010
360
51
Naples/Dortmund
www.flapane.com
Any way to join different m4v videos taken with the phone (HD quality)?
I tried with Avidemux and MkvmergeGUI, but the result is awful: the video stutters and the FPS count (as seen in Media player Classic) ranges from 150 to 300 FPS.