If you want to start cutting from the beginning of the video, if should default to that position. So the first thing is to drag the bar that you'll find down near the bottom of the Avidemux screen, through the timeline of the video until you get as close as you can to the start of the part of the video that you want to cut out. Once choosen, the video will take some time (not that long really) to be processed & loaded into Avidemux.Īfter the video is loaded it can then be edited. Still, the cuts loop fine (and that includes audio) when played in a loop, so I guess this is indeed frame-accurate.Open the file you wish to edit in Avidemux using Menu File > Open & then source the video file that you want to start snipping up. however, even with this, the final video bitrate for me ends up 337 kb/s. The video encoding settings for cut.mp4 seem to be identical to inputvid.mp4 except video bitrate changed from 389 kb/s to 526 kb/s, and also the audio encoding settings are nearly the same, except the sampling rate changed from 44100 to 48000 Hz though that can be regulated with: melt inputvid.mp4 in=7235 out=7349 -consumer avformat:cut.mp4 acodec=aac ar=44100 ab=95k vcodec=libx264 vb=389k
#USE AVIDEMUX TO CUT VIDEO MP4#
and here is what ffmpeg sees for this file: ffmpeg -i cut.mp4 -f mp4 /dev/null 2>&1 | grep 'Stream\|encoder' encoder : Lavf54.20.4 Then to check if cut.mp4 loops correctly, use melt again to play it back twice - and play it to an SDL window: melt cut.mp4 cut.mp4 -consumer sdl and melt will cut with the piece between frames 72 into a new file, cut.mp4. Ok, so we can see ffmpeg chooses libx264 and aac encoders for this video then we can enter this in for melt: melt inputvid.mp4 in=7235 out=7349 -consumer avformat:cut.mp4 acodec=aac vcodec=libx264 Say you have an inputvid.mp4 - first check its encoding settings with say ffmpeg (here, I just say I want to encode it again to -f mp4, but as the file /dev/null so the output is discarded I redirect stderr so I can grep through it - note in the middle, the command prompts, and you should answer y with ENTER, so the process proceeds and dumps the useful info this is with ffmpeg 3.3.3 on Ubuntu 14): ffmpeg -i inputvid.mp4 -f mp4 /dev/null 2>&1 | grep 'Stream\|encoder'
#USE AVIDEMUX TO CUT VIDEO INSTALL#
The only Linux command-line tool I've found so-far, that can cut at exact frame (or, with frame accuracy), is melt ( sudo apt-get install melt).
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