Simple shrink a mp4 below 10mb. Discord limits to 10MB. I often have the issue where my videos are slightly above that. this will help make it uploadable.

shrink-mp4.sh

#!/usr/bin/env bash

# Requires
# - ffmpeg

input="$1"

if [[ -z "$input" ]]; then
  echo "Usage: shrink-video <input-video>"
  exit 1
fi

if [[ ! -f "$input" ]]; then
  echo "File not found: $input"
  exit 1
fi

dir="$(dirname "$input")"
filename="$(basename "$input")"
ext="${filename##*.}"

# Remove extension
base="${filename%.*}"

# Strip trailing [xxxx] (common yt-dlp pattern)
clean_name="$(echo "$base" | sed -E 's/[[:space:]]*\[[^]]+\]$//')"

output="$dir/${clean_name}-shrunk.${ext}"

ffmpeg -i "$input" \
  -vf "scale=640:360:force_original_aspect_ratio=decrease" \
  -c:v libx264 -crf 28 -preset fast \
  -c:a aac -b:a 96k \
  -fs 10M \
  "$output"