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.
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llogan
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Hideki Nishimura
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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
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Yes. How to ? Please I ask for command – Hideki Nishimura Aug 21 '17 at 12:12
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Possible duplicate of https://askubuntu.com/questions/56022/what-to-use-to-quickly-cut-audio-video. – Redbob Aug 21 '17 at 12:47
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What is this purpose? -acodec copy -ss 00:30:00 -t 00:30:00 output2.avi – Hideki Nishimura Aug 21 '17 at 12:51
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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.
llogan
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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