Convert H.265 (HEVC) to H.264 (MPEG-4 AVC)

h265toh264.sh

#!/usr/bin/env bash
#
# Description: Convert H.265 (HEVC) to H.264 (MPEG-4 AVC)
# Author: Josué Cau <me@josuecau.com>
# Date: 2018-02-16
# Dependencies: ffmpeg(1)

set -e

if [ "$#" -ne 3 ]; then
  echo "Usage: $(basename "$0") INPUT OUTPUT"
  exit 1
fi

if ! type ffmpeg >/dev/null 2>&1; then
  echo 'ffmpeg(1) not found'
  exit 1
fi

input="$1"
output="$2"

# https://gist.github.com/davidtron/52f6805e7a46605359c7
# ffmpeg -i "$input" -map 0:v -c:v libx264 -preset slow -crf 22 -map 0:a -c:a copy -strict -2 -c:a aac "$output"

# https://superuser.com/a/1381151
ffmpeg -i "$input" -c:v libx264 -crf 18 -c:a copy "$output"