How to automatically segment video using ffmpeg without re-encoding?

Question

I have a 2 hour video. I want to make 30 minute sections but avoid re-encoding. So 2 hours of video into four 30 minute videos. How can I do this using a single ffmpeg command?

I am using Ubuntu 16.04 64-bit.

Do you mean you wanna split your 2-hour video in 30-min pieces, so you will have 4 pieces with 30-min each? — Redbob, Aug 21 '17 at 11:51
Possible duplicate of https://askubuntu.com/questions/56022/what-to-use-to-quickly-cut-audio-video. — Redbob, Aug 21 '17 at 12:47
What is this purpose?
-acodec copy -ss 00:30:00 -t 00:30:00 output2.avi — Hideki Nishimura, Aug 21 '17 at 12:51

llogan · Accepted Answer · 2020-10-21T18:41:46.487

24

You can use the segment muxer:

ffmpeg -i input.mp4 -map 0 -c copy -f segment -segment_time 1800 -reset_timestamps 1 output_%03d.mp4

In this example output files will be named output_000.mp4, output_001.mp4, etc.
Segments may not be exactly 30 minutes long because it must cut on keyframes only.

edited Oct 21 '20 at 18:41

answered Aug 21 '17 at 20:26

llogan

11,868

You can also format the arguments for -segment_time in hours, minutes, and seconds (eg. 01:00:00) – plunker May 21 '23 at 03:44

How to automatically segment video using ffmpeg without re-encoding?

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