From 6acd47c1ca27d705afe88b292a55a5170c038d2e Mon Sep 17 00:00:00 2001
From: Ken D'Ambrosio <ken@jots.org>
Date: Thu, 14 May 2026 22:53:09 +0000
Subject: Auto-transcode non-browser-playable videos to MP4 in update.rb

On each run, any .avi, .mkv, or .mov file without a same-named .mp4
sibling is transcoded with ffmpeg (H.264/AAC, CRF 23, faststart).
The original is kept on disk and hidden in album.json so only the
playable MP4 appears in the UI; admins can un-hide the original if
needed.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
---
 scripts/update.rb | 43 +++++++++++++++++++++++++++++++++++++++----
 1 file changed, 39 insertions(+), 4 deletions(-)

(limited to 'scripts/update.rb')

diff --git a/scripts/update.rb b/scripts/update.rb
index 0b052ba..a4969d3 100644
--- a/scripts/update.rb
+++ b/scripts/update.rb
@@ -22,10 +22,11 @@ MEDIA_ROOT = (ENV['MEDIA_ROOT'] || '/var/albumen').freeze
 CACHE_ROOT = (ENV['CACHE_ROOT'] || '/opt/albumen/cache/thumbs').freeze
 THUMB_SIZE = 300
 
-IMAGE_EXTS = %w[jpg jpeg png gif webp heic heif tiff bmp].freeze
-VIDEO_EXTS = %w[mp4 mov avi mkv webm m4v ogv].freeze
-AUDIO_EXTS = %w[mp3 flac ogg wav m4a aac].freeze
-MEDIA_EXTS = (IMAGE_EXTS + VIDEO_EXTS + AUDIO_EXTS).freeze
+IMAGE_EXTS     = %w[jpg jpeg png gif webp heic heif tiff bmp].freeze
+VIDEO_EXTS     = %w[mp4 mov avi mkv webm m4v ogv].freeze
+AUDIO_EXTS     = %w[mp3 flac ogg wav m4a aac].freeze
+MEDIA_EXTS     = (IMAGE_EXTS + VIDEO_EXTS + AUDIO_EXTS).freeze
+TRANSCODE_EXTS = %w[avi mkv mov].freeze  # not universally browser-playable; convert to MP4
 
 # ── Directory processing ───────────────────────────────────────────────────────
 
@@ -37,6 +38,7 @@ def process_dir(dir)
   json_path = File.join(dir, 'album.json')
   data = load_json(json_path)
   data['files'] ||= {}
+  data['cover']   = '__random__' unless data.key?('cover')
   data['visible'] = true unless data.key?('visible')
 
   # Enumerate current media files
@@ -57,6 +59,26 @@ def process_dir(dir)
     end
   end
 
+  # Transcode non-web-friendly videos to MP4; hide the original
+  current.select { |n| TRANSCODE_EXTS.include?(File.extname(n).downcase.delete_prefix('.')) }
+         .each do |name|
+    base   = File.basename(name, '.*')
+    target = "#{base}.mp4"
+    next if current.include?(target)   # already transcoded on a previous run
+    full = File.join(dir, name)
+    dest = File.join(dir, target)
+    puts "  Transcoding: #{name} → #{target}"
+    transcode_to_mp4(full, dest)
+    if File.exist?(dest)
+      data['files'][name] ||= {}
+      data['files'][name]['visible'] ||= false   # hide original; admin can override
+      current << target                           # include in processing pass below
+      puts "    → done (original hidden)"
+    else
+      warn "  Transcode failed: #{name}"
+    end
+  end
+
   # Process each file
   current.each do |name|
     full = File.join(dir, name)
@@ -161,6 +183,19 @@ rescue StandardError => e
   warn "  Thumb error (image): #{e.message}"
 end
 
+def transcode_to_mp4(source, dest)
+  system(
+    'ffmpeg', '-y', '-i', source,
+    '-c:v', 'libx264', '-crf', '23', '-preset', 'medium',
+    '-c:a', 'aac',
+    '-movflags', '+faststart',
+    dest,
+    %i[out err] => '/dev/null'
+  )
+rescue StandardError => e
+  warn "  Transcode error: #{e.message}"
+end
+
 def generate_video_thumb(source, dest)
   system(
     'ffmpeg', '-y', '-ss', '2', '-i', source,
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