Playlist supports video tracks (full-screen video + audio through the analyser)

Audio and video files can both be added to the playlist; video tracks play
full-screen with their audio routed through the analyser (visuals/waveform
react), have duration/progress, and are included in recordings. Persisted.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/audio.js

@@ -34,6 +34,9 @@ class AudioEngine {
     this.stream = null;       // MediaStream when using live input
     this.mode = 'none';
     this.onEnded = null;      // callback fired when a (non-looping) track ends
+    this._videoSrc = null;    // persistent source for the playlist video element
+    this._videoGain = null;
+    this._videoSrcEl = null;
 
     // Smoothed band values and beat state.
     this.gain = 1.0;          // master reactivity multiplier
@@ -145,6 +148,28 @@ class AudioEngine {
     this.mode = 'input';
   }
 
+  // Play a playlist video track: route the given <video> element's audio
+  // through the analyser/output so visuals react and it's audible/recordable.
+  attachVideo(videoEl) {
+    this.resume();
+    this._disconnectSource();
+    if (this._videoSrcEl !== videoEl) {
+      // createMediaElementSource may only be called once per element.
+      this._videoSrc = this.ctx.createMediaElementSource(videoEl);
+      this._videoGain = this.ctx.createGain();
+      this._videoSrc.connect(this._videoGain);
+      this._videoGain.connect(this.analyser);
+      this._videoGain.connect(this.outGain);
+      this._videoGain.connect(this.recordDest);
+      this._videoSrcEl = videoEl;
+    }
+    videoEl.onended = () => { if (this.onEnded) this.onEnded(); };
+    this.mediaEl = videoEl;
+    this.sourceNode = null;
+    this.sourceGain = null;
+    this.mode = 'video';
+  }
+
   async listInputDevices() {
     // Labels are only populated after permission is granted.
     try { await navigator.mediaDevices.getUserMedia({ audio: true }).then(s => s.getTracks().forEach(t => t.stop())); } catch (e) {}

src/control.html

@@ -47,11 +47,11 @@
       <section class="span2">
         <label>Playlist <span id="playlist-count">0 brani</span></label>
         <div class="row">
-          <button id="btn-add-tracks">➕ Aggiungi brani</button>
+          <button id="btn-add-tracks">➕ Aggiungi brani/video</button>
           <button id="btn-clear-playlist">🗑 Svuota</button>
           <label class="chk"><input type="checkbox" id="repeat-playlist" /> Ripeti</label>
         </div>
-        <input type="file" id="tracks-input" accept="audio/*" multiple hidden />
+        <input type="file" id="tracks-input" accept="audio/*,video/*" multiple hidden />
         <input type="file" id="scene-img-input" accept="image/*" hidden />
         <ol id="playlist" class="playlist"></ol>
         <div class="hint-mini">Clic sul <b>nome</b> = avvia/riavvia · ▶/⏸ pausa · ⠿ riordina · ⌨ tasto rapido · 🎬 <b>scena</b> (effetto+testo+immagine applicati quando parte il brano)</div>

src/control.js

@@ -205,7 +205,7 @@ let activeCues = [], firedCue = -1;            // cue schedule for the playing t
 
 function savePlaylistState() {
   if (djv.savePlaylist) {
-    djv.savePlaylist(playlist.map(t => ({ path: t.path, name: t.name, key: t.key || null, cues: t.cues || [] })));
+    djv.savePlaylist(playlist.map(t => ({ path: t.path, name: t.name, key: t.key || null, cues: t.cues || [], isVideo: !!t.isVideo })));
   }
 }
 
@@ -252,7 +252,7 @@ function probePaths(paths) {
 function addTracks(items) {
   // items: array of { path, name }
   const start = playlist.length;
-  items.forEach(it => { if (it.path) playlist.push({ path: it.path, name: it.name || baseName(it.path), key: null }); });
+  items.forEach(it => { if (it.path) playlist.push({ path: it.path, name: it.name || baseName(it.path), key: null, cues: [], isVideo: !!it.isVideo }); });
   renderPlaylist();
   savePlaylistState();
   probePaths(items.map(it => it.path));
@@ -267,7 +267,7 @@ function playIndex(i) {
   ended = false;
   playbackOwner = 'playlist';
   activePad = -1; padPlaying = false; renderPads();
-  send({ type: 'playTrack', path: playlist[i].path });
+  send({ type: playlist[i].isVideo ? 'playVideoTrack' : 'playTrack', path: playlist[i].path });
   startCues(playlist[i]);
   $('#btn-play').disabled = false;
   $('#btn-play').textContent = '⏸ Pausa';
@@ -321,7 +321,7 @@ function renderPlaylist() {
     const prog = (isCur && playDur > 0) ? Math.min(100, playCur / playDur * 100) : 0;
     li.innerHTML =
       '<span class="grip">⠿</span>' +
-      '<span class="tname" title="Avvia / riavvia dall\'inizio — ' + tr.name.replace(/"/g, '&quot;') + '">' + tr.name + '</span>' +
+      '<span class="tname" title="Avvia / riavvia dall\'inizio — ' + tr.name.replace(/"/g, '&quot;') + '">' + (tr.isVideo ? '🎞 ' : '') + tr.name + '</span>' +
       '<span class="ttime">' + timeLabel + '</span>' +
       '<button class="key-btn" title="Assegna tasto rapido">' +
         (capturingFor === i ? '…' : (tr.key ? tr.key.toUpperCase() : '⌨')) + '</button>' +
@@ -409,7 +409,7 @@ function renderPlaylist() {
 
 $('#btn-add-tracks').addEventListener('click', () => $('#tracks-input').click());
 $('#tracks-input').addEventListener('change', (e) => {
-  const items = [...e.target.files].map(f => ({ path: filePath(f), name: f.name }));
+  const items = [...e.target.files].map(f => ({ path: filePath(f), name: f.name, isVideo: f.type.startsWith('video/') }));
   if (items.length) addTracks(items);
   e.target.value = ''; // allow re-adding the same file
 });
@@ -672,7 +672,7 @@ if (padXfade) padXfade.addEventListener('input', (e) => {
     if (Array.isArray(saved) && saved.length) {
       playlist = saved.map(t => ({
         path: t.path, name: t.name || baseName(t.path),
-        key: t.key || null, cues: Array.isArray(t.cues) ? t.cues : []
+        key: t.key || null, cues: Array.isArray(t.cues) ? t.cues : [], isVideo: !!t.isVideo
       }));
       renderPlaylist();
       probePaths(playlist.map(t => t.path));
@@ -723,14 +723,12 @@ window.addEventListener('drop', (e) => {
   e.preventDefault();
   document.body.classList.remove('dragover');
   const files = [...e.dataTransfer.files];
-  const audioItems = files.filter(f => f.type.startsWith('audio/'))
-    .map(f => ({ path: filePath(f), name: f.name }));
+  // Audio and video files both go into the playlist as tracks.
+  const mediaItems = files.filter(f => f.type.startsWith('audio/') || f.type.startsWith('video/'))
+    .map(f => ({ path: filePath(f), name: f.name, isVideo: f.type.startsWith('video/') }));
   const imgPaths = files.filter(f => f.type.startsWith('image/')).map(filePath).filter(Boolean);
-  const videoFile = files.find(f => f.type.startsWith('video/'));
-  const videoPath = videoFile && filePath(videoFile);
-  if (audioItems.length) addTracks(audioItems);
+  if (mediaItems.length) addTracks(mediaItems);
   if (imgPaths.length) send({ type: 'addImages', paths: imgPaths });
-  if (videoPath) send({ type: 'videoLoad', path: videoPath });
 });
 
 // ---------------------------------------------------------------- keyboard

src/output.html

@@ -13,6 +13,9 @@
   <!-- Video layer (VJ loop) that blends with the generated visuals -->
   <video id="bg-video" class="bg-video" loop muted playsinline></video>
 
+  <!-- Playlist video track (full screen, with its own audio) -->
+  <video id="track-video" class="track-video" playsinline></video>
+
   <!-- Image overlay layer -->
   <div id="overlay-images"></div>
 

src/output.js

@@ -94,6 +94,10 @@ function composeFrame() {
     recCtx.globalCompositeOperation = 'source-over';
   }
 
+  if (trackVideo.classList.contains('show') && trackVideo.readyState >= 2 && trackVideo.videoWidth) {
+    try { drawMediaFit(recCtx, trackVideo, W, H, 'contain'); } catch (e) {}
+  }
+
   for (const im of images) {
     if (!im.classList.contains('show')) continue;
     const r = im.getBoundingClientRect();
@@ -210,6 +214,7 @@ function loadCustomTexture(dataUrl) {
 }
 
 const bgVideo = $('#bg-video');
+const trackVideo = $('#track-video');
 const sceneImage = $('#scene-image');
 
 // Two independent logos.
@@ -249,7 +254,8 @@ function probeDurations(paths) {
   let pending = paths.length;
   const finish = () => { if (--pending === 0) djv.report({ type: 'durations', list: results }); };
   paths.forEach(p => {
-    const a = new Audio();
+    // A <video> element reads duration for both audio and video files.
+    const a = document.createElement('video');
     a.preload = 'metadata';
     a.onloadedmetadata = () => { results.push({ path: p, duration: isFinite(a.duration) ? a.duration : 0 }); finish(); };
     a.onerror = () => { results.push({ path: p, duration: 0 }); finish(); };
@@ -291,12 +297,26 @@ djv.onControl(async (m) => {
       break;
     case 'playTrack':
       try {
+        // Switching to an audio track: stop/hide any playing video track.
+        trackVideo.pause(); trackVideo.classList.remove('show');
         audio.onEnded = () => djv.report({ type: 'trackEnded' });
         await audio.loadFile(toFileURL(m.path), { loop: false, crossfade: m.crossfade || 0 });
         hideHint();
         djv.report({ type: 'playState', playing: true });
       } catch (e) { djv.report({ type: 'error', message: e.message }); }
       break;
+    case 'playVideoTrack':
+      try {
+        audio.onEnded = () => djv.report({ type: 'trackEnded' });
+        trackVideo.loop = false; trackVideo.muted = false;
+        trackVideo.src = toFileURL(m.path);
+        trackVideo.classList.add('show');
+        audio.attachVideo(trackVideo);
+        await trackVideo.play();
+        hideHint();
+        djv.report({ type: 'playState', playing: true });
+      } catch (e) { djv.report({ type: 'error', message: e.message }); }
+      break;
     case 'probeDurations': probeDurations(m.paths || []); break;
     case 'togglePlay': {
       const playing = audio.togglePlay();

src/style.css

@@ -417,6 +417,19 @@ body.output { cursor: none; background: #000; }
 }
 .bg-video.show { display: block; }
 
+.track-video {
+  position: fixed;
+  inset: 0;
+  width: 100vw;
+  height: 100vh;
+  object-fit: contain;
+  background: #000;
+  z-index: 2;            /* main visual when a video track plays */
+  pointer-events: none;
+  display: none;
+}
+.track-video.show { display: block; }
+
 /* ---- Per-track scene image ---- */
 .scene-image {
   position: fixed;