Rename Podcast Clips

rename.sh

#!/usr/bin/env bash
set -euo pipefail

# Usage: ./rename.sh "EAS-207. " [--apply]
#   Dry-run by default; pass --apply to actually rename.

prefix=""
apply=0
for arg in "$@"; do
  case "$arg" in
    --apply) apply=1 ;;
    *) prefix="$arg" ;;
  esac
done

if [[ -z "$prefix" ]]; then
  echo "Usage: $0 \"EAS-207. \" [--apply]" >&2
  exit 1
fi

if ! command -v ffprobe >/dev/null 2>&1; then
  echo "ABORT: ffprobe not found (needed to detect orientation)." >&2
  exit 1
fi

shopt -s nullglob

# Matches the Riverside exports, including " (1)" duplicate markers that
# distinguish a second orientation exported to the same base name.
for f in riverside_*_empower-apps.mp4 riverside_*_empower-apps\ \(*\).mp4; do
  base="${f%.mp4}"
  base="${base#riverside_}"
  base=$(printf '%s' "$base" | sed -E 's/ \([0-9]+\)$//')  # drop trailing " (N)"
  base="${base%_empower-apps}"
  base="${base//_/ }"
  title=$(printf '%s' "$base" \
    | awk '{for(i=1;i<=NF;i++){$i=toupper(substr($i,1,1)) substr($i,2)}}1')
  # TODO: add a substitution step for common terms that title-casing gets wrong,
  # e.g. "Ai" -> "AI", "Ios" -> "iOS", "Api" -> "API", "Swiftui" -> "SwiftUI".

  # Detect orientation from the video stream's dimensions.
  dims=$(ffprobe -v error -select_streams v:0 \
    -show_entries stream=width,height -of csv=p=0 "$f")
  w="${dims%%,*}"
  h="${dims##*,}"
  if (( h > w )); then
    orient="Vertical"
  else
    orient="Horizontal"
  fi

  new="${prefix}${title} - ${orient}.mp4"

  if [[ "$f" == "$new" ]]; then
    continue
  fi
  if [[ -e "$new" ]]; then
    echo "ABORT: target already exists: $new (from $f)" >&2
    echo "Resolve this conflict manually, then re-run." >&2
    exit 1
  fi
  if (( apply )); then
    mv -- "$f" "$new"
    echo "renamed: $f -> $new"
  else
    printf '%s   ->   %s\n' "$f" "$new"
  fi
done

if (( ! apply )); then
  echo
  echo "(dry-run — re-run with --apply to rename)"
fi