[FFmpeg-user] To extract and get some parts/clips out of a MP4 file to be concatenated into another

[llee040 at sbcglobal.net]

> On Jul 22, 2021, at 3:26 AM, Budi <budikusasi at gmail.com> wrote:
> 
> How to extract/get some parts/clips out of a MP4 file to be
> concatenated into another new MP4 file
> 
> tried to get/extract out only first 19 seconds, also a part beginning
> from 32th up to its next 37 seconds, and finally part beginning from 2
> min 29th s up to its next 99 seconds, by this:
> 
> $ ffmpeg -t 19 -i Example.mp4 -ss 0:0:32 -t 37 -i Example.mp4 -ss
> 0:2:29 -t 99 -i Example.mp4  -ss 0:0:0 -c copy
> ~/Downloads/ExampleOut.mp4
> to no avail
> 
> sincere help is appreciated

It looks as though you're using macOS. I’m using Big Sur 11.5. This works for me, but I don’t seem to have the command line savvy to use named pipes, so I wind up with 3 intermediate files in addition to the desired output file. My source file (Example.mp4) is in ~/Downloads.

inputfileName=$(echo 'Example.mp4');/usr/local/bin/ffmpeg -i ~"/Downloads/$inputfileName" -ss 00:00:00.00 -t 00:00:19.00 -c copy -map 0 -movflags +faststart ~/Downloads/1Out.mp4;/usr/local/bin/ffmpeg -i ~"/Downloads/$inputfileName" -ss 00:00:32.00 -t 00:00:37.00 -c copy -map 0 -movflags +faststart ~/Downloads/2Out.mp4;/usr/local/bin/ffmpeg -i ~"/Downloads/$inputfileName" -ss 00:02:29.00 -t 00:01:39.00 -c copy -map 0 -movflags +faststart ~/Downloads/3Out.mp4;loggedInUser=$( scutil <<< "show State:/Users/ConsoleUser" | awk '/Name :/ && ! /loginwindow/ { print $3 }' );echo "file /Users/$loggedInUser/Downloads/1Out.mp4
file /Users/$loggedInUser/Downloads/2Out.mp4
file /Users/$loggedInUser/Downloads/3Out.mp4
" > ffmpegCatList;sleep 3;/usr/local/bin/ffmpeg -f concat -safe 0 -i ffmpegCatList -c copy ~'/Downloads/ExampleOut.mp4';sleep 1
;/bin/echo '
			
			==========================
			
			ExampleOut.mp4 FINISHED!
			
			==========================
			
			';mv ffmpegCatList ~'/.Trash/‘

Laine Lee