cli image/video tools ( ffmpeg / imagemagick )

👾 MOST OF THIS PAGE IS DIRECT OUTPUT OF CHATGPT 3.5

Here are some advanced commands for two powerful multimedia tools: FFmpeg and ImageMagick.

Table of Contents

FFmpeg Cheat Sheet

FFmpeg is a powerful tool for manipulating video and audio files.

Command	Description
`ffmpeg -i input.mp4 output.avi`	Convert MP4 file to AVI
`ffmpeg -i input.mp4 -ss 00:00:10 -t 00:00:05 output.mp4`	Trim a video from 10 seconds to 15 seconds
`ffmpeg -i input.mp4 -vn output.mp3`	Extract audio from a video file
`ffmpeg -i input.mp4 -vf "scale=640:360" output.mp4`	Resize a video to 640×360 pixels

Command	Description
`ffmpeg -i input.mp4 -filter_complex "[0:v]split[v1][v2];[v1]scale=640:360[v1out];[v2]scale=1280:720[v2out]" -map "[v1out]" -map "[v2out]" -preset ultrafast -c:v libx264 -c:a copy output.mp4`	Split a video into two different resolutions (640×360 and 1280×720)
`ffmpeg -i input.mp4 -i watermark.png -filter_complex "overlay=10:10" output.mp4`	Add a watermark to a video
`ffmpeg -i input.mp4 -af "pan=stereo\|c0=c1\|c1=c0" output.mp4`	Convert mono audio to stereo
`ffmpeg -i input.mp4 -c:v libx264 -crf 23 -preset veryslow -c:a copy -movflags +faststart output.mp4`	Encode a video with a CRF value of 23 and a very slow preset, and enable fast start for streaming

ImageMagick is a powerful tool for manipulating images.

Command	Description
`convert input.jpg output.png`	Convert a JPEG file to PNG
`convert input.png -resize 50% output.png`	Resize a PNG file to 50% of its original size
`convert input.png -rotate 45 output.png`	Rotate a PNG file by 45 degrees
`convert input.png -crop 100x100+10+10 output.png`	Crop a 100×100 pixel region of a PNG file, starting from the point (10,10)

Command	Description
`convert input.png -morphology Convolve Sobel:1 output.png`	Apply a Sobel edge detection filter to a PNG file
`convert input.png -colorspace Gray -negate output.png`	Convert a PNG file to grayscale and invert its colors
`convert input.png -threshold 50% output.png`	Apply a binary threshold to a PNG file
`convert input1.png input2.png -compose Difference -composite -normalize output.png`	Compute the absolute difference between two PNG files

ImageMagick’s mogrify command allows you to process multiple images in a directory at once. Here are some useful commands:

Command	Description
mogrify -resize 50% *.jpg	Resize all JPEG files in the current directory to 50% of their original size
mogrify -format png *.jpg	Convert all JPEG files in the current directory to PNG
mogrify -rotate 90 *.png	Rotate all PNG files in the current directory by 90 degrees
mogrify -strip *.jpg	Remove EXIF data from all JPEG files in the current directory

Note that mogrify modifies the original files in place, so be sure to make a backup of your files before using this command

Command	Description
mogrify -resize 50% *.jpg	Resize all JPEG files in the current directory to 50% of their original size
mogrify -format png *.jpg	Convert all JPEG files in the current directory to PNG
mogrify -rotate 90 *.png	Rotate all PNG files in the current directory by 90 degrees
mogrify -strip *.jpg	Remove EXIF data from all JPEG files in the current directory

Note that mogrify modifies the original files in place, so be sure to make a backup of your files before using this command.