ffmpeg add srt to video file with solid black subtitle background

ffmpeg_burn_subs.command

# Adds subtitles.srt to video.mp4 as solid black background, and saves as subbed_video.mp4
# via: https://stackoverflow.com/questions/25870169/how-to-set-background-to-subtitle-in-ffmpeg

# Options:
# OutlineContour=&AARRGGBB - [Alpha, Red, Green, Blue], Change Alpha value for semi-transparent background
# Outline=3 - Specifies the padding for the background rectangle.
ffmpeg -i video.mp4 -filter_complex "subtitles=subtitles.srt:force_style='OutlineColour=&000000000,BorderStyle=3,Outline=3,Shadow=0,MarginV=20'" subbed_video.mp4