![crop video file online crop video file online](https://images.wondershare.com/democreator/article/video-cutter-crop-video.jpg)
It might sounds counter-intuitive, as we thought cropping a video would be as easy as cropping an image.
Crop video file online for mac#
To crop the borders of a video using FFmpeg (top, bottom, left and right borders), use:įfmpeg -i input.mp4 filter:v "crop=iw-n:ih-n" output.Struggling to find a free video cropper? There are no native ways to crop a video on Windows, for Mac and mobile users, the built-in croppers have limited functions. Using FFmpeg to crop pixels from the video left and/or right or top and bottom borders
Crop video file online how to#
You might also like: How To Download A YouTube Playlist And Convert It To MP3 Using youtube-dl (Command Line) In this case we're using the input width ( iw) as the x coordinate (to start cropping from the right), and 0 as the y coordinate (to start from the top). Let's look at a basic FFmpeg crop example in which we'll crop a square of 100 pixels from the center.Ĭrop 50% of the video width and 50% of the video height (which means the output video will be a quarter - 25% - of the input video), starting from the top right of the input video:įfmpeg -i input.mp4 -filter:v "crop=iw*(5/10):ih*(5/10):iw:0" output.mp4 It's just for preview / playback purposes. This doesn't modify the input.mp4 video in any way, and it doesn't produce a new video. You can preview (play) the video cropping without waiting for its re-encoding by playing it with ffplay (useful for quickly seeing if the crop region is correct), like this:įfplay -filter:v "crop=w:h:x:y" input.mp4 This may sound a bit complicated, but you'll see in the examples that's not the case so much (but of course, it depends on what you want to achieve). iw/2 for half the input video width, or ih-100 to subtract 100 pixels from the input video height). FFmpeg gets the original input video width ( iw) and height ( ih) values automatically, so you can perform mathematical operations using those values (e.g.This won't work with images, that's why you don't see a separate example with screenshot here There is also an optional keep_aspect option that you can set to 1 to force the output display aspect ratio to be the same of the input (example usage: "crop=100:100:0:0:keep_aspect=1").The filter will automatically center the crop if x and y are omitted, so x defaults to (iw-w)/2, and y to (ih-h)/2.output.mp4 is the new, cropped video file.y the vertical position from where to begin cropping, starting from the top of the video (the absolute top being 0).x the horizontal position from where to begin cropping, starting from the left (with the absolute left margin being 0).h the height of the output video (the height of the cropped region), which defaults to the input video height (input video height = ih, with in_h being another notation for the same thing) out_h may also be used instead of h.w the width of the output video (so the width of the cropped region), which defaults to the input video width (input video width = iw, which is the same as in_w) out_w may also be used instead of w.
![crop video file online crop video file online](https://media.videosolo.com/video-cutter/crop.jpg)