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definitely check into those virus reports..email the author on windows. I use linux appimage
LosslessCut is good for selecting clips then remuxing them together. Vidcutter appimage won't start for me..no idea why.
Videomass also can quickly concatenate by remuxing clips together without reencoding just like LosslessCut or re-encode if ya wish.
here's a preset I use for rencoding and just need to change output mp4 or mkv and the timecodes. And it'll output 01.mp4, 02.mp4, 03.mp4, etc.
ffmpeg -i in.mp4
-ss 10 -to 20
-c:v hevc -strict -2 -c:a libopus -b:a 64k 01
-ss 1:00 -to 1:10
-c:v hevc -strict -2 -c:a libopus -b:a 64k 02
-ss 2:30 -to 2:40
-c:v hevc -strict -2 -c:a libopus -b:a 64k 03
-ss 6:30 -to 6:40
-c:v hevc -strict -2 -c:a libopus -b:a 64k 04
-ss 12:30 -to 12:50
-c:v hevc -strict -2 -c:a libopus -b:a 64k 05
Or this preset for decoding them and rencoding them all at once
must input seconds not HH:MM:SS so 1*3600 +36*60 +45 = 1:36:45
ffmpeg -i in.mp4
-c:v hevc -crf 33 -strict -2
-c:a libopus -b:a 64k
-vf "select='
between(t, 20, 50)
+between(t, 2*60 +10, 3*60 +5)
+between(t, 5*60, 5*60 +30)
+between(t, 19*60 +40, 20*60 +10)',
+between(t, 1*3600 +15*60, 1*3600+ 15*60 +47)
+between(t, 1*3600 +36*60 +45, 1*3600 +37*60 +5)',
setpts=N/FRAME_RATE/TB"
-af "aselect='
between(t, 20, 50)
+between(t, 2*60 +10, 3*60 +5)
+between(t, 5*60, 5*60 +30)
+between(t, 19*60 +40, 20*60 +10)',
+between(t, 1*3600 +15*60, 1*3600+ 15*60 +47)
+between(t, 1*3600 +36*60 +45, 1*3600 +37*60 +5)',
asetpts=N/SR/TB" output.mp4
Has an excellent GUI for youtube-dl
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