I have cropped video using ffmpeg command after convert output media file not generating. I have used below command for crop video.
final String[] cmd={-version, -i, /storage/emulated/0/DCIM/ZyfVideo/VID_20170915_033023.mp4, -s, 720x1184, -vf, crop=480:480, setdar=1:1, setsar=1:1, -c:a, copy, /storage/emulated/0/DCIM/ZyfVideo/VID_20170915_033038.mp4};