ffmpeg -i input.mp4 -vf "crop=500:300:0:0" -c:v libx264 -crf 0 -c:a copy output.mp4Where the crop option is of the form: w:h:x:y.
ffmpeg -i input.mp4 -vf "crop=500:300:0:0" -c:v libx264 -crf 0 -c:a copy output.mp4Where the crop option is of the form: w:h:x:y.