[FFmpeg-user] Crop 4K Video into Four 1080p Videos?

Gyan gyandoshi at gmail.com
Mon Jun 26 22:02:40 EEST 2017

On Mon, Jun 26, 2017 at 11:58 PM, Clay D. Montgomery <clay at montgomery1.com>

> Hello,
>     I'm wondering if it is possible to use ffmpeg to slice 4K video into a
> set of four 1080p videos and do it without scaling.

You need to use the crop filter. For four distinct outputs,

    ffmpeg -i input -vf crop=1920:1080:0:0 output1 -vf
crop=1920:1080:1920:0 output2 -vf crop=1920:1080:0:1080 output3 -vf
crop=1920:1080:1920:1080 output4

(I've ignored audio. The above command will transcode it. Add -c:a copy
before each output to avoid that)

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