Quote:
Originally Posted by StainlessS
I believe that Avidemux will re-encode just the partial decoded gops [also same for old MPeg2Cut2 and mpg2 files, long time since I used either one].
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Sorry, no, this is not true in both cases...
Neither AviDemux nor Mpeg2Cut2 can perform "Smart Rendering", i.e. just reencode the GOP where a cut point is requested.
For MPEG2 the only free smart render solution is still Cuttermaran. And for H264 clips I am not aware of any free tools which can do this.
A lot of commercial video editors like the offerings by Magix, Cyberlink, Pinnacle, Pegasys and others claim that they can do smart rendering for H.264 and even H.265, but several test reports revealed that this is not really true.
For cutting H.264 clips at key frames there are several free solutions, but the only half way working solution for cutting at random frames is VidCutter. Looks like it has been abandoned, but I find it very useful. It works better with MP4 containers than with MKV, and it really helps to replace the included FFmpeg version with a current version.