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FFMPEG doesn't really have the tools to do motion detection out of the box. You can certainly do the cropping using the crop filter: -vf crop=w:h:x:y where w:h is the size of your cropped area and x:y its coordinates in the original image. So your ffmpeg script might look like: ffmpeg -i input.avi -c:v libx264 -crf 20 -vf crop=123:45:67:89 output.mp4 Then ...


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There's one way I know of to find the clip that is using the filter. Inside the timeline, you will see a small badge with the letters 'fx' on your clips. If it it grayed out, there is no effect applied. If it is colored purple, yellow, green, or red, then you have an effect on the clip. You can read about that more here... ...



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