How to keep part of a video | Trim and atrim video filters explained
Today, we show how to keep part a video / drop part of a video using the trim video filter. The method allows you to select the beginning, the end or part of a film! Enjoy!
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How to remove the last X seconds from the end of a video | Cut the end of a film
• How to remove the last X seconds from...
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EXAMPLES
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❶ Keeping the start of a video (no audio trimming)
→ ffmpeg -i input.mp4 -vf trim=duration=5 output01.mp4
with:
-i input.mp4 = Reads input.mp4…
-vf trim = … calls the «trim» video filter (vf)…
duration=5 = … keeping 5 seconds of video from the start (default)
output01.mp4 = … and outputs the result to file «output01.mp4»
❷ Keeping the end of a video (audio & video trimming)
→ ffmpeg -i input.mp4 -vf trim=start=2 -af atrim=start=2 output02.mp4
with:
-i input.mp4 = Reads file «input.mp4» and …
-vf trim = … calls the «trim» video filter (vf)…
start = … to keep all video starting …
2 = … after 2 seconds …
-af atrim = Calls now the atrim audio filter (af) …
start=2 = … to keep all audio after 2 seconds …
output02.mp4 = … and outputs the result to file «output02.mp4»
❸ Keeping the middle of a video (resetting timestamps)
→ ffmpeg -i input.mp4 -vf trim=start=2:duration=5,setpts=PTS-STARTPTS -af atrim=start=2:duration=5,asetpts=PTS-STARTPTS output03.mp4
with:
-i input.mp4 = Reads file «input.mp4» and …
-vf trim = … calls the «trim» video filter (vf)…
start=2 = … that keeps all video starting after 2 seconds…
duration=5 = … for a duration of 5 seconds
(i.e. seconds 2 to 7)
setpts=PTS-STARTPTS = … resetting the video timestamp to 0 at start.
-af atrim = Calls now the «atrim» audio filter (af)…
start=2:duration=5 = … keeping audio between seconds 2 to 7 and…
asetpts=PTS-STARTPTS = … resetting the audio timestamp to 0 at start.
output03.mp4 = … and outputs the result to file «output03.mp4»
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MUSIC
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