QuickTime Player's trim option is good for a few straight cuts. (SmartCutter options have 'Whole GOP mode' but I could not activate it). Unlike SmartCutter, Avidemux can show the GOP structure so the user can place the cut points at keyframes so no new frames are needed to re-encode (I could not spot any quality difference in newly generated frames, though). The results were very similar except Avidemux output lacked some GPS info (I used MP4v2 muxer because in my earlier tests it seemed better than the older MP4 mixer which caused the very first frame to open as a blank or black frame in MPEG Streamclip or Mojave's QuickTime Player).Īvidemux and SmartCutter are very similar with non-Apple GUI especially in SmartCutter.Īvidemux has much more options which might be overwhelming and need some tests before choosing the best workflow (the default is a straight lossless copy as MP4).

I used mainly the default settings in this quick test.

mp4 with QuickTime Player, Avidemux and SmartCutter and compared the output specs with Invisor. I briefly tested in Big Sur to trim a DJI P3P silent 4K D-log.

Trim video with avidemux