osx macOS video conversion with ffmpeg

ffmpeg_cheatsheet.sh

# ffmpeg cheatsheet for video resizing and modification

## Install ffmpeg (this takes forever
❯ brew install ffmpeg --with-libvpx
# ...
==> make install
🍺  /usr/local/Cellar/ffmpeg/3.2.2: 239 files, 51.7M, built in 8 minutes 31 seconds

## Downscale/upscale to desired dimensions
❯ ffmpeg -i input.mp4 -s 1080x720 output.mp4

## Apply 90 degree clockwise rotation
# 0 = 90CounterCLockwise and Vertical Flip (default)
# 1 = 90Clockwise
# 2 = 90CounterClockwise
# 3 = 90Clockwise and Vertical Flip
# Use -vf "transpose=2,transpose=2" for 180 degrees.
ffmpeg -i input.mov -vf "transpose=1" output.mov

## Apply rotation metadata instead of full re-transposition
ffmpeg -i input.m4v -metadata:s:v rotate="90" -codec copy output.m4v