Make MP4 movie from a PNG image sequence

movie_from_image_sequence.sh

#!/bin/bash

# Create an MP4 movie from the image sequence.

# Specify
# -framerate N = frames/sec
# -i FILENAMES = image file path and names. %04d says that the numbering for images is fixed width (width = 4) and zeros are used for padding
ffmpeg -framerate 11 -i image_directory/image_stem_%04d.png -c:v libx264 -pix_fmt yuv420p -vf "scale=trunc(iw/2)*2:trunc(ih/2)*2" movie_name.mp4

# Ideally this should play well on OS X, Windows and Linux. Uploads to Youtube.