FFMPEG.md

FFMPEG

Official site: https://ffmpeg.org

Documentation: https://ffmpeg.org/ffmpeg.html

Filter documentation: https://ffmpeg.org/ffmpeg-filters.html

Installation

Mac (the harder way)

Install homebrew

/usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"

Use brew to install ffmpeg

brew install ffmpeg --with-ffplay

Mac (The easier way)

Download ffmpeg and unzip it.

Then, in the terminal type:

mv ~/Downloads/ffmpeg /usr/local/bin/

Windows

Download from here: https://ffmpeg.zeranoe.com/builds/

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Basic Use

Converting from one format to another:

ffmpeg -i input.mp4 output.avi

Turning a video into a gif:

ffmpeg -i input.mp4 output.gif

Turning a video into choppier but smaller gif: (-r 3 will make it 3 frames per second)

ffmpeg -i input.mp4 -r 3 output.gif

Extracting the audio:

ffmpeg -i input.mp4 audio.mp3

Extracting frames from a video:

ffmpeg -i input.mp4 frame%d.jpg

Turning a series of images into a video:

ffmpeg -f image2 -i image%d.jpg video.mp4

Increasing the speed of a video:

ffmpeg -i input.mp4 -vf "setpts=0.5*PTS" fastvideo.mp4

Slowing it down:

ffmpeg -i input.mp4 -vf "setpts=2.0*PTS" slowvid.mp4

Resize a video:

ffmpeg -i input.mp4 -c:v libx264 -s:v 100x100 -c:a copy output.mp4

Extracting a portion of a video: (this will get five seconds, starting at 1 minute and 30 seconds)

ffmpeg -ss 00:01:30 -i input.mp4 -c:v copy -c:a copy -t 5 output.mp4

More complex stuff

Making a mirror effect:

ffmpeg -i input.mp4 -vf "crop=iw/2:ih:0:0,split[left][tmp];[tmp]hflip[right];[left][right] hstack" output.mp4

Edge detection:

ffmpeg -i input.mp4 -vf "edgedetect=low=0.1:high=0.4" output.mp4

Fading in:

ffmpeg -i input.mp4 -vf "fade=in:0:30" output.mp4

Slow down a video with frame interpolation:

ffmpeg -i input.mp4 -vf "[0:v]minterpolate=fps=120:mi_mode=mci[out];[out]setpts=5*PTS" -y output.mp4

Stitch together all mp4s in a folder:

ffmpeg -f concat -i <(for f in /path/to/folder/*.mp4; do echo "file '$f'"; done) -c copy output.mp4

Record from a webcam (on mac) for 10 seconds and save to file

ffmpeg -f avfoundation -pixel_format yuyv422 -framerate 30 -video_size 1280x720 -i 0:0 -t 00:00:10 -y webcamrecord.mp4