See https://github.com/CallumDev/discordencode/blob/main/discordencode for the updated version

discordencode.sh

#!/bin/bash
# discordencode - encodes a video file to under 8MiB for Discord
usage () {
    echo "Usage: [USEAUDIO=1] [VPRESET=x264-preset] discordencode input output.mp4"
}
if [ -z "$1" ]
then
    usage
    exit 1
fi
if [ -z "$2" ]
then
   usage
   exit 1
fi
if [ ! -f "$1" ]; then
    echo "$1 does not exist"
    exit 2
fi
# Bitrate math functions
# Bc and ffprobe are a bit arcane
duration_seconds () {
    ffprobe -i "$1" -show_entries format=duration -v quiet -of csv="p=0"
}

subtract_and_truncate () {
    echo "x = $1; scale = 0; x / 1 - $2" | bc -l
}

divide_floats() {
    echo "scale=2; $1 / $2" | bc
}

audioargs="-an"
audiobits=0
if [[ $USEAUDIO ]] && [ "$USEAUDIO" -eq "1" ]
then
    audioargs="-c:a aac -b:a 96k"
    audiobits=96
    echo "Using 96k aac audio"
fi
if [ -z "$VPRESET" ]
then
    VPRESET=veryslow
fi
duration=$(duration_seconds "$1")
echo $1
echo Duration is $duration
kbits=$(subtract_and_truncate $(divide_floats 60630.8 $duration) $audiobits)
echo Video bitrate is $kbits kb/s
set -x
ffmpeg -y -i "$1" -c:v libx264 -preset $VPRESET -threads 0 -b:v ${kbits}k -pass 1 -an -f mp4 /dev/null
ffmpeg -i "$1" -c:v libx264 -preset $VPRESET -threads 0 -b:v ${kbits}k -pass 2 $audioargs "$2"

Put USEAUDIO=1 env var USEAUDIO=1 ./discordencode.sh in.ext out.mp4

I've made a fork, it adds audio by default.

@xDShot thank you so much! especially for replying that fast and forking with audio enabled by default. Me not being able to figure it out just goes to show how inexperienced I am when it comes to bash. But you can bet I will never forget how environment variables work again, so thanks.

Hey guys @N72826 @xDShot this gist has been replaced by this repo: https://github.com/CallumDev/discordencode/

Hey guys @N72826 @xDShot this gist has been replaced by this repo: https://github.com/CallumDev/discordencode/

ah ok. thank you very much guys.