Convert movie file to GIF animation using ffmpeg and jq

conv2gif.sh

#!/usr/bin/env bash
# Convert movie file to GIF animation using ffmpeg and jq
set -e -o pipefail

MAX_WIDTH=1200
MAX_HEIGHT=1200

# ffprobe
stream_info=$(ffprobe -v quiet -print_format json -show_streams "$1")
width=$(echo "$stream_info" | jq '.streams[0].width')
height=$(echo "$stream_info" | jq '.streams[0].height')

# resize
if [ ${width} -gt ${height} ]; then
  out_width=$width
  out_height=-1
  if [ ${width} -gt ${MAX_WIDTH} ]; then
    out_width=$MAX_WIDTH
  fi
else
  out_height=$height
  out_width=-1
  if [ ${height} -gt ${MAX_HEIGHT} ]; then
    out_height=$MAX_HEIGHT
  fi
fi
scale="$out_width:$out_height"

# ffmepg
ffmpeg -i "$1" -vf scale="$scale" -r 10 "$1".gif