Of course, this command can be combined with other FFmpeg combinations. crop=1920:1080:0:200 means to make a 1920×1080 video starting from the leftmost side of the source image (=0 pixels horizontally) and 200 pixels down from the top.-vf is the command for “video filter”.the most critical parts of the above command are: There is more information about this command in many places (for example, here). It does give me a GIF output but the size is 1138圆40 instead of 640圆40. If you want to get it done, here is the one-liner: ffmpeg -i input.avi ffmpeg -i output2.mp4 -vf crop=1920:1080:0:200 output.avi I would like ffmpeg to grab a 1280x720 MP4 video file, crop to square size ratio, resize it to 640圆40 The following two commands work for me with great GIF quality bu it's just missing the correct resizing. That is not the same as cropping a video file, which only selects a particular part of the video for export. So, to clarify, trimming a video file means making it shorter by removing frames in the beginning and/or end. This may be basic, but I often see the concepts of cropping and trimming used interchangeably. This expression is evaluated only once during the filter configuration. The command syntax looks like this: ffmpeg -i before.mp4 -vf 'cropw:h:x:y' after.mp4 The crop filter accepts the following options: w Width of the output video (outw). Here is a short how-to guide for myself and others. In this chapter, we'll crop the input video to given dimensions. I have previously written about how to trim video files with FFmpeg.
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