How can I use ffmpeg to split MPEG video into 10 minute chunks?

Here is the one line solution:

ffmpeg -i input.mp4 -c copy -map 0 -segment_time 00:20:00 -f segment output%03d.mp4

Please note that this does not give you accurate splits, but should fit your needs. It will instead cut at the first frame after the time specified after segment_time, in the code above it would be after the 20 minute mark.

If you find that only the first chunk is playable, try adding -reset_timestamps 1 as mentioned in the comments.

ffmpeg -i input.mp4 -c copy -map 0 -segment_time 00:20:00 -f segment -reset_timestamps 1 output%03d.mp4

An Alternate more readable way would be

ffmpeg -i input.mp4 -ss 00:00:00 -to 00:10:00 -c copy output1.mp4
ffmpeg -i input.mp4 -ss 00:10:00 -to 00:20:00 -c copy output2.mp4

/**
* -i  input file
* -ss start time in seconds or in hh:mm:ss
* -to end time in seconds or in hh:mm:ss
* -c codec to use
*/

Here's the source and list of Commonly used FFmpeg commands.

Just use what is built into ffmpeg to do exactly this.

ffmpeg -i invid.mp4 -threads 3 \
       -vcodec copy -f segment -segment_time 10:00 \
       -reset_timestamps 1 \
       cam_out_h264_%02d.mp4

This will split it into roughly 10-minute chunks, split at the relevant keyframes, and will output to the files cam_out_h264_01.mp4, cam_out_h264_02.mp4, etc.

If you want to create really same Chunks must force ffmpeg to create i-frame on the every chunks' first frame so you can use this command for create 0.5 second chunk.

ffmpeg -hide_banner  -err_detect ignore_err -i input.mp4 -r 24 -codec:v libx264  -vsync 1  -codec:a aac  -ac 2  -ar 48k  -f segment   -preset fast  -segment_format mpegts  -segment_time 0.5 -force_key_frames  "expr: gte(t, n_forced * 0.5)" out%d.mkv

Faced the same problem earlier and put together a simple Python script to do just that (using FFMpeg). Available here: https://github.com/c0decracker/video-splitter, and pasted below:

#!/usr/bin/env python
import subprocess
import re
import math
from optparse import OptionParser
length_regexp = 'Duration: (\d{2}):(\d{2}):(\d{2})\.\d+,'
re_length = re.compile(length_regexp)
def main():
    (filename, split_length) = parse_options()
    if split_length <= 0:
        print "Split length can't be 0"
        raise SystemExit
    output = subprocess.Popen("ffmpeg -i '"+filename+"' 2>&1 | grep 'Duration'",
                              shell = True,
                              stdout = subprocess.PIPE
    ).stdout.read()
    print output
    matches = re_length.search(output)
    if matches:
        video_length = int(matches.group(1)) * 3600 + \
                       int(matches.group(2)) * 60 + \
                       int(matches.group(3))
        print "Video length in seconds: "+str(video_length)
    else:
        print "Can't determine video length."
        raise SystemExit
    split_count = int(math.ceil(video_length/float(split_length)))
    if(split_count == 1):
        print "Video length is less then the target split length."
        raise SystemExit
    split_cmd = "ffmpeg -i '"+filename+"' -vcodec copy "
    for n in range(0, split_count):
        split_str = ""
        if n == 0:
            split_start = 0
        else:
            split_start = split_length * n
            split_str += " -ss "+str(split_start)+" -t "+str(split_length) + \
                         " '"+filename[:-4] + "-" + str(n) + "." + filename[-3:] + \
                         "'"
    print "About to run: "+split_cmd+split_str
    output = subprocess.Popen(split_cmd+split_str, shell = True, stdout =
                              subprocess.PIPE).stdout.read()
def parse_options():
    parser = OptionParser()
    parser.add_option("-f", "--file",
                      dest = "filename",
                      help = "file to split, for example sample.avi",
                      type = "string",
                      action = "store"
    )
    parser.add_option("-s", "--split-size",
                      dest = "split_size",
                      help = "split or chunk size in seconds, for example 10",
                      type = "int",
                      action = "store"
    )
    (options, args) = parser.parse_args()
    if options.filename and options.split_size:
        return (options.filename, options.split_size)
    else:
        parser.print_help()
        raise SystemExit
if __name__ == '__main__':
    try:
        main()
    except Exception, e:
        print "Exception occured running main():"
        print str(e)

Note the exact punctuation of the alternative format is -ss mm:ss.xxx. I struggled for hours trying to use the intuitive-but-wrong mm:ss:xx to no avail.

$ man ffmpeg | grep -C1 position

-ss position
Seek to given time position in seconds. "hh:mm:ss[.xxx]" syntax is also supported.

References here and here.

ffmpeg -i input.mp4 -force_key_frames expr:gte(t,n_forced*600) -f segment -segment_time 600 -reset_timestamps 1 -map 0 -segment_format_options movflags=+faststart output_%03d.mp4

To split the video more accurately, you can use the -force_key_frames option to specify keyframes at the desired split points.

• -f segment -segment_time 600 sets the segment length
• gte(t, n_forced*600): This is the expression itself, where:
  • t represents the current time of the video frame being processed.
  • n_forced represents the number of keyframes that have been forced so far.
  • *600 multiplies n_forced by 600, which is the time interval in seconds.

#!/bin/bash

if [ "X$1" == "X" ]; then
    echo "No file name for split, exiting ..."
    exit 1
fi

if [ ! -f "$1" ]; then
    echo "The file '$1' doesn't exist. exiting ..."
    exit 1
fi

duration=$(ffmpeg -i "$1" 2>&1 | grep Duration | sed 's/^.*Duration: \(.*\)\..., start.*$/\1/' | awk -F: '{ print ($1 * 3600) + ($2 * 60) + $3 }')      #'
split_time=${split_time:-55}
time=0
part=1

filename=${file%%.*}
postfix=${file##*.}

while [ ${time} -le ${duration} ]; do

echo    ffmpeg -i "$1" -vcodec copy -ss ${time} -t ${split_time} "${filename}-${part}.${postfix}"
    (( part++ ))
    (( time = time + split_time ))

done

One line solution

for i in {3..100}; do ffmpeg -i input.mp4 -ss $(($((i))*600)) -t $(($((i+1))*600)) $i.mp4 ; done;

Please have a look into below command

fun trim(): Array<String?>{
        val cmdList = ArrayList<String>()
        var cmds: Array<String?>? = null
        try{
            cmdList.add("-y")

            cmdList.add("-ss")
            cmdList.add(startduration.toString())
            cmdList.add("-t")
            cmdList.add(endduration.toString())
            cmdList.add("-i")
            cmdList.add(sourcevideopath)
            cmdList.add("-vcodec")
            cmdList.add("copy")

            cmdList.add("-movflags")
            cmdList.add("faststart")
            cmdList.add("-preset")
            cmdList.add("ultrafast")

            cmdList.add(outputvideopath)

            cmds = arrayOfNulls<String>(cmdList.size)
            cmdList.toArray(cmds)

        }catch (e:Exception){
            e.printStackTrace()
        }
        return cmds!!
    }