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I am cropping and splitting a video of size 13476*1500 into 4 parts, below is the filters. The conversion is very very slow! Is there a faster way to convert the videos? please help!

And also i want to know if there is an alternative way to do the same job or with handbrake.

ffmpeg -i input.mp4 -filter_complex "[0:v]crop=2691:1200:0:0[out1];[0:v]crop=4036:1200:2691:0[out2];[0:v]crop=2691:1200:6727:0[out3];[0:v]crop=4036:1200:9418:0[out4]" -map [out1] -map 0:a out1.mp4 -map [out2] -map 0:a out2.mp4 -map [out3] -map 0:a out3.mp4 -map [out4] -map 0:a out4.mp4
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    Not really – your input file is huge. This process will be largely CPU- and memory-bound. What are your system specs? And yes, you can use Handbrake to crop video, but I'm not sure you can automate it that easily.
    – slhck
    Jun 11, 2019 at 12:33
  • @slhck thank you for responding, the file size is 150mb, 8 sec video file. I have intel i5 6300u running at 2.5 ghz.
    – user3416431
    Jun 11, 2019 at 12:56
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    The original file size in MB does not matter, but when it is decoded you'll have uncompressed 13476⨉1500 px frames loaded. Do you care about what output codec / format is used?
    – slhck
    Jun 11, 2019 at 13:14
  • yes output format is .mp4
    – user3416431
    Jun 11, 2019 at 13:24
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    That was not my question. Do you care about which format it is? Do you have any particular requirements in terms of codec, file size, quality, …?
    – slhck
    Jun 11, 2019 at 13:31

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