diff --git a/sim/cluster0/lab-seeds/backend/config/config.example.php b/sim/cluster0/lab-seeds/backend/config/config.example.php
index a994f44..44edaf8 100644
--- a/sim/cluster0/lab-seeds/backend/config/config.example.php
+++ b/sim/cluster0/lab-seeds/backend/config/config.example.php
@@ -121,4 +121,15 @@ return [
             ],
         ],
     ],
+    // V.2x experimental restream — ac-ms-media-transcode worker scripts
+    'media_pipelines' => [
+        'enabled' => true,
+        'developers_only' => true,
+        'script_root' => '/var/www/ac/workspace/ac-ms-media-transcode',
+        'storage_root' => '/var/www/ac/media-pipelines',
+        'hls_url_prefix' => '/app/androidcast_project/media/hls',
+        'hls_filesystem_root' => '/var/www/ac/media-pipelines/hls',
+        'logo_path' => '/var/www/ac/workspace/ac-ms-media-transcode/assets/pirate_drift.png',
+        'ytdlp_enabled' => true,
+    ],
 ];
diff --git a/sim/cluster0/lab-seeds/backend/public/api/media_pipelines.php b/sim/cluster0/lab-seeds/backend/public/api/media_pipelines.php
new file mode 100644
index 0000000..b787329
--- /dev/null
+++ b/sim/cluster0/lab-seeds/backend/public/api/media_pipelines.php
@@ -0,0 +1,118 @@
+<?php
+declare(strict_types=1);
+require_once __DIR__ . '/../../src/bootstrap.php';
+require_once __DIR__ . '/../../src/MediaPipelinesRepository.php';
+require_once __DIR__ . '/../../src/MediaPipelineRunner.php';
+
+header('Content-Type: application/json; charset=utf-8');
+
+Auth::check();
+
+if (!MediaPipelinesRepository::gateAllowed()) {
+    json_out(['ok' => false, 'error' => 'forbidden'], 403);
+}
+
+$user = Auth::user();
+$userId = (int) ($user['id'] ?? 0);
+$companyId = (int) cfg('rbac.default_company_id', 1);
+
+$method = $_SERVER['REQUEST_METHOD'] ?? 'GET';
+$action = trim((string) ($_GET['action'] ?? ''));
+
+if ($method === 'GET') {
+    if ($action === 'config') {
+        json_out([
+            'ok' => true,
+            'config' => [
+                'hls_url_prefix' => MediaPipelineRunner::hlsPublicPrefix(),
+                'ytdlp_enabled' => (bool) cfg('media_pipelines.ytdlp_enabled', true),
+                'script_root' => MediaPipelineRunner::scriptRoot(),
+            ],
+            'permissions' => [
+                'can_operate' => MediaPipelinesRepository::gateCanOperate(),
+            ],
+        ]);
+    }
+    if ($action === 'list') {
+        json_out([
+            'ok' => true,
+            'pipelines' => MediaPipelinesRepository::listForUser($userId, $companyId),
+        ]);
+    }
+    $id = (int) ($_GET['id'] ?? 0);
+    if ($action === 'get' && $id > 0) {
+        $row = MediaPipelinesRepository::getById($id, $userId, $companyId);
+        if ($row === null) {
+            json_out(['ok' => false, 'error' => 'not_found'], 404);
+        }
+        json_out(['ok' => true, 'pipeline' => $row]);
+    }
+    if ($action === 'logs' && $id > 0) {
+        $row = MediaPipelinesRepository::getById($id, $userId, $companyId);
+        if ($row === null) {
+            json_out(['ok' => false, 'error' => 'not_found'], 404);
+        }
+        json_out(['ok' => true, 'lines' => MediaPipelineRunner::tailLog($row)]);
+    }
+    json_out(['ok' => false, 'error' => 'unknown_action'], 400);
+}
+
+if ($method !== 'POST') {
+    json_out(['ok' => false, 'error' => 'method_not_allowed'], 405);
+}
+
+if (!MediaPipelinesRepository::gateCanOperate()) {
+    json_out(['ok' => false, 'error' => 'forbidden'], 403);
+}
+
+$raw = file_get_contents('php://input') ?: '';
+$body = json_decode($raw, true);
+if (!is_array($body)) {
+    json_out(['ok' => false, 'error' => 'invalid_json'], 400);
+}
+
+if ($action === 'create') {
+    try {
+        $row = MediaPipelinesRepository::create($userId, $companyId, $body);
+        json_out(['ok' => true, 'pipeline' => $row]);
+    } catch (InvalidArgumentException $e) {
+        json_out(['ok' => false, 'error' => $e->getMessage()], 400);
+    } catch (Throwable $e) {
+        json_out(['ok' => false, 'error' => 'create_failed'], 500);
+    }
+}
+
+$id = (int) ($body['id'] ?? $_GET['id'] ?? 0);
+if ($id <= 0) {
+    json_out(['ok' => false, 'error' => 'missing_id'], 400);
+}
+
+$pipeline = MediaPipelinesRepository::getById($id, $userId, $companyId);
+if ($pipeline === null) {
+    json_out(['ok' => false, 'error' => 'not_found'], 404);
+}
+
+if ($action === 'probe') {
+    $result = MediaPipelineRunner::probe($pipeline);
+    if ($result['ok'] ?? false) {
+        MediaPipelinesRepository::updateRuntime($id, [
+            'probe_json' => json_encode($result['probe'], JSON_UNESCAPED_SLASHES),
+        ]);
+    }
+    json_out($result);
+}
+
+if ($action === 'start') {
+    try {
+        json_out(MediaPipelineRunner::start($pipeline));
+    } catch (Throwable $e) {
+        MediaPipelinesRepository::updateStatus($id, 'error', $e->getMessage());
+        json_out(['ok' => false, 'error' => $e->getMessage()], 500);
+    }
+}
+
+if ($action === 'stop') {
+    json_out(MediaPipelineRunner::stop($id, $userId, $companyId));
+}
+
+json_out(['ok' => false, 'error' => 'unknown_action'], 400);
diff --git a/sim/cluster0/lab-seeds/backend/public/assets/js/media_pipelines.js b/sim/cluster0/lab-seeds/backend/public/assets/js/media_pipelines.js
new file mode 100644
index 0000000..8383f3a
--- /dev/null
+++ b/sim/cluster0/lab-seeds/backend/public/assets/js/media_pipelines.js
@@ -0,0 +1,233 @@
+(function () {
+  const API = 'media_pipelines.php';
+  let canOperate = document.body.getAttribute('data-can-mp-operate') === '1';
+  let player = null;
+  let selectedId = null;
+  let pollTimer = null;
+
+  function basePath() {
+    return document.body.getAttribute('data-base-path') || '';
+  }
+
+  function apiUrl(action, params) {
+    const u = new URL(basePath() + '/api/' + API, window.location.origin);
+    u.searchParams.set('action', action);
+    if (params) {
+      Object.keys(params).forEach(function (k) {
+        u.searchParams.set(k, params[k]);
+      });
+    }
+    return u.toString();
+  }
+
+  function setStatus(msg, isError) {
+    const el = document.getElementById('mp-status');
+    if (!el) return;
+    el.textContent = msg;
+    el.classList.toggle('reports-status--error', !!isError);
+  }
+
+  async function fetchJson(url, options) {
+    const res = await fetch(url, Object.assign({ credentials: 'same-origin' }, options || {}));
+    const data = await res.json().catch(function () { return { ok: false, error: 'invalid_json' }; });
+    if (!res.ok && data.ok !== false) {
+      data.ok = false;
+      data.error = data.error || ('http_' + res.status);
+    }
+    return data;
+  }
+
+  function esc(s) {
+    const d = document.createElement('div');
+    d.textContent = s == null ? '' : String(s);
+    return d.innerHTML;
+  }
+
+  function truncate(s, n) {
+    s = String(s || '');
+    return s.length > n ? s.slice(0, n) + '…' : s;
+  }
+
+  function destroyPlayer() {
+    if (player && typeof player.dispose === 'function') {
+      try { player.dispose(); } catch (e) { /* ignore */ }
+    }
+    player = null;
+  }
+
+  function loadPlayer(hlsUrl) {
+    const section = document.getElementById('mp-player-section');
+    const urlEl = document.getElementById('mp-player-url');
+    if (!section || !hlsUrl) {
+      if (section) section.hidden = true;
+      destroyPlayer();
+      return;
+    }
+    section.hidden = false;
+    if (urlEl) urlEl.textContent = hlsUrl;
+
+    if (typeof window.videojs !== 'function') {
+      setStatus('Video.js not loaded — check nuevo-player assets', true);
+      return;
+    }
+
+    destroyPlayer();
+    player = window.videojs('mp-player', {
+      controls: true,
+      autoplay: false,
+      preload: 'auto',
+      fluid: true,
+      html5: { vhs: { overrideNative: true }, nativeAudioTracks: false, nativeTextTracks: false },
+    });
+    player.src({ src: hlsUrl, type: 'application/x-mpegURL' });
+    if (typeof player.nuevo === 'function') {
+      player.nuevo({});
+    }
+  }
+
+  async function loadList() {
+    const data = await fetchJson(apiUrl('list'));
+    if (!data.ok) {
+      setStatus(data.error || 'list failed', true);
+      return;
+    }
+    renderTable(data.pipelines || []);
+    setStatus('Updated — ' + (data.pipelines || []).length + ' pipeline(s)');
+  }
+
+  function renderTable(rows) {
+    const tbody = document.getElementById('mp-tbody');
+    if (!tbody) return;
+    tbody.innerHTML = '';
+    rows.forEach(function (p) {
+      const tr = document.createElement('tr');
+      const hls = p.hls_playlist_url
+        ? '<a href="' + esc(p.hls_playlist_url) + '" target="_blank" rel="noopener">playlist</a>'
+        : '—';
+      const actions = [];
+      actions.push('<button type="button" class="btn btn--sm" data-mp-select="' + p.id + '">Select</button>');
+      if (canOperate) {
+        actions.push('<button type="button" class="btn btn--sm" data-mp-probe="' + p.id + '">Probe</button>');
+        actions.push('<button type="button" class="btn btn--sm" data-mp-start="' + p.id + '">Start</button>');
+        actions.push('<button type="button" class="btn btn--sm" data-mp-stop="' + p.id + '">Stop</button>');
+        actions.push('<button type="button" class="btn btn--sm" data-mp-logs="' + p.id + '">Logs</button>');
+      }
+      tr.innerHTML =
+        '<td>' + esc(p.name) + '</td>' +
+        '<td><span class="tag-pill">' + esc(p.status) + '</span></td>' +
+        '<td>' + esc(p.run_mode) + '</td>' +
+        '<td title="' + esc(p.source_url) + '">' + esc(truncate(p.source_url, 48)) + '</td>' +
+        '<td>' + hls + '</td>' +
+        '<td class="toolbar-actions">' + actions.join(' ') + '</td>';
+      tbody.appendChild(tr);
+    });
+  }
+
+  async function selectPipeline(id) {
+    selectedId = id;
+    const data = await fetchJson(apiUrl('get', { id: id }));
+    if (!data.ok || !data.pipeline) return;
+    const p = data.pipeline;
+    if (p.probe) {
+      document.getElementById('mp-probe-section').hidden = false;
+      document.getElementById('mp-probe-json').textContent = JSON.stringify(p.probe, null, 2);
+    }
+    if (p.hls_playlist_url) {
+      loadPlayer(p.hls_playlist_url);
+    }
+  }
+
+  async function onCreate(ev) {
+    ev.preventDefault();
+    if (!canOperate) return;
+    const form = ev.target;
+    const body = {
+      name: form.name.value,
+      source_url: form.source_url.value,
+      source_fmt: form.source_fmt.value,
+      audio_source: form.audio_source.value,
+      filter_profile: form.filter_profile.value,
+      output_preset: form.output_preset.value,
+      run_mode: form.run_mode.value,
+    };
+    setStatus('Creating…');
+    const data = await fetchJson(apiUrl('create'), {
+      method: 'POST',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify(body),
+    });
+    if (!data.ok) {
+      setStatus(data.error || 'create failed', true);
+      return;
+    }
+    form.reset();
+    await loadList();
+    if (data.pipeline && data.pipeline.id) {
+      await selectPipeline(data.pipeline.id);
+    }
+  }
+
+  async function postAction(action, id) {
+    setStatus(action + '…');
+    const data = await fetchJson(apiUrl(action, { id: id }), {
+      method: 'POST',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify({ id: id }),
+    });
+    if (!data.ok) {
+      setStatus(data.error || action + ' failed', true);
+      return data;
+    }
+    await loadList();
+    await selectPipeline(id);
+    if (action === 'start' && data.hls_url) {
+      loadPlayer(data.hls_url);
+    }
+    setStatus(action + ' OK');
+    return data;
+  }
+
+  async function showLogs(id) {
+    const data = await fetchJson(apiUrl('logs', { id: id }));
+    const sec = document.getElementById('mp-logs-section');
+    const pre = document.getElementById('mp-logs');
+    if (!sec || !pre) return;
+    sec.hidden = false;
+    pre.textContent = (data.lines || []).join('\n') || '(no log yet)';
+  }
+
+  function onTableClick(ev) {
+    const t = ev.target;
+    if (!t || !t.getAttribute) return;
+    const id = t.getAttribute('data-mp-select') || t.getAttribute('data-mp-probe')
+      || t.getAttribute('data-mp-start') || t.getAttribute('data-mp-stop') || t.getAttribute('data-mp-logs');
+    if (!id) return;
+    if (t.hasAttribute('data-mp-select')) selectPipeline(id);
+    else if (t.hasAttribute('data-mp-probe')) postAction('probe', id);
+    else if (t.hasAttribute('data-mp-start')) postAction('start', id);
+    else if (t.hasAttribute('data-mp-stop')) postAction('stop', id);
+    else if (t.hasAttribute('data-mp-logs')) showLogs(id);
+  }
+
+  function init() {
+    const app = document.getElementById('media-pipelines-app');
+    if (!app) return;
+
+    document.getElementById('mp-create-form')?.addEventListener('submit', onCreate);
+    document.getElementById('mp-tbody')?.addEventListener('click', onTableClick);
+    document.getElementById('mp-refresh')?.addEventListener('click', loadList);
+
+    if (!canOperate) {
+      document.getElementById('mp-create-section')?.setAttribute('hidden', '');
+    }
+
+    loadList();
+    pollTimer = window.setInterval(loadList, 15000);
+  }
+
+  if (document.readyState === 'loading') {
+    document.addEventListener('DOMContentLoaded', init);
+  } else {
+    init();
+  }
+})();
diff --git a/sim/cluster0/lab-seeds/backend/sql/migrations/081_media_pipelines.sql b/sim/cluster0/lab-seeds/backend/sql/migrations/081_media_pipelines.sql
new file mode 100644
index 0000000..82f8998
--- /dev/null
+++ b/sim/cluster0/lab-seeds/backend/sql/migrations/081_media_pipelines.sql
@@ -0,0 +1,29 @@
+-- Media pipelines (V.2x experimental restream) — MariaDB
+-- mysql -u root -p androidcast_crashes < sql/migrations/081_media_pipelines.sql
+
+CREATE TABLE IF NOT EXISTS media_pipelines (
+    id INT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
+    company_id INT UNSIGNED NOT NULL DEFAULT 1,
+    owner_user_id INT UNSIGNED NOT NULL,
+    name VARCHAR(128) NOT NULL,
+    source_url TEXT NOT NULL,
+    source_fmt VARCHAR(64) NULL,
+    audio_source TEXT NULL,
+    filter_profile VARCHAR(32) NOT NULL DEFAULT 'default',
+    output_preset VARCHAR(16) NOT NULL DEFAULT '1080p',
+    run_mode ENUM('full','encode_only') NOT NULL DEFAULT 'full',
+    status ENUM('idle','starting','running','stopping','error') NOT NULL DEFAULT 'idle',
+    hls_slug VARCHAR(64) NULL,
+    pid_encode INT NULL,
+    pid_fanout INT NULL,
+    work_dir TEXT NULL,
+    record_path TEXT NULL,
+    hls_playlist_url TEXT NULL,
+    probe_json LONGTEXT NULL,
+    last_error TEXT NULL,
+    created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    updated_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
+    KEY idx_mp_company (company_id, status),
+    KEY idx_mp_owner (owner_user_id),
+    KEY idx_mp_status (status)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
diff --git a/sim/cluster0/lab-seeds/backend/sql/migrations/081_media_pipelines.sqlite.sql b/sim/cluster0/lab-seeds/backend/sql/migrations/081_media_pipelines.sqlite.sql
new file mode 100644
index 0000000..9590bcb
--- /dev/null
+++ b/sim/cluster0/lab-seeds/backend/sql/migrations/081_media_pipelines.sqlite.sql
@@ -0,0 +1,28 @@
+-- Media pipelines — SQLite (local dev)
+
+CREATE TABLE IF NOT EXISTS media_pipelines (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    company_id INTEGER NOT NULL DEFAULT 1,
+    owner_user_id INTEGER NOT NULL,
+    name TEXT NOT NULL,
+    source_url TEXT NOT NULL,
+    source_fmt TEXT NULL,
+    audio_source TEXT NULL,
+    filter_profile TEXT NOT NULL DEFAULT 'default',
+    output_preset TEXT NOT NULL DEFAULT '1080p',
+    run_mode TEXT NOT NULL DEFAULT 'full',
+    status TEXT NOT NULL DEFAULT 'idle',
+    hls_slug TEXT NULL,
+    pid_encode INTEGER NULL,
+    pid_fanout INTEGER NULL,
+    work_dir TEXT NULL,
+    record_path TEXT NULL,
+    hls_playlist_url TEXT NULL,
+    probe_json TEXT NULL,
+    last_error TEXT NULL,
+    created_at TEXT NOT NULL DEFAULT (datetime('now')),
+    updated_at TEXT NOT NULL DEFAULT (datetime('now'))
+);
+
+CREATE INDEX IF NOT EXISTS idx_mp_company ON media_pipelines (company_id, status);
+CREATE INDEX IF NOT EXISTS idx_mp_owner ON media_pipelines (owner_user_id);
diff --git a/sim/cluster0/lab-seeds/backend/src/MediaPipelineRunner.php b/sim/cluster0/lab-seeds/backend/src/MediaPipelineRunner.php
new file mode 100644
index 0000000..e6ac52f
--- /dev/null
+++ b/sim/cluster0/lab-seeds/backend/src/MediaPipelineRunner.php
@@ -0,0 +1,227 @@
+<?php
+declare(strict_types=1);
+
+/**
+ * Invokes ac-ms-media-transcode shell scripts on the BE host (lab / dev).
+ */
+final class MediaPipelineRunner {
+    public static function scriptRoot(): string {
+        $root = trim((string) cfg('media_pipelines.script_root', ''));
+        if ($root !== '' && is_dir($root)) {
+            return rtrim($root, '/');
+        }
+        $env = getenv('AC_MEDIA_PIPELINES_ROOT');
+        if (is_string($env) && $env !== '' && is_dir($env)) {
+            return rtrim($env, '/');
+        }
+        $fallback = '/var/www/ac/workspace/ac-ms-media-transcode';
+        if (is_dir($fallback)) {
+            return $fallback;
+        }
+        throw new RuntimeException(
+            'ac-ms-media-transcode script root not found — set media_pipelines.script_root in config.php'
+        );
+    }
+
+    public static function logoPath(): string {
+        $logo = trim((string) cfg('media_pipelines.logo_path', ''));
+        if ($logo !== '' && is_file($logo)) {
+            return $logo;
+        }
+        $default = self::scriptRoot() . '/assets/pirate_drift.png';
+        if (is_file($default)) {
+            return $default;
+        }
+        throw new RuntimeException('pirate_drift.png not found under ac-ms-media-transcode/assets/');
+    }
+
+    public static function storageRoot(): string {
+        $root = trim((string) cfg('media_pipelines.storage_root', ''));
+        if ($root === '') {
+            $root = self::scriptRoot() . '/storage';
+        }
+        if (!is_dir($root)) {
+            mkdir($root, 0755, true);
+        }
+        return rtrim($root, '/');
+    }
+
+    public static function hlsFilesystemRoot(): string {
+        $root = trim((string) cfg('media_pipelines.hls_filesystem_root', ''));
+        if ($root === '') {
+            $root = self::storageRoot() . '/hls';
+        }
+        if (!is_dir($root)) {
+            mkdir($root, 0755, true);
+        }
+        return rtrim($root, '/');
+    }
+
+    public static function hlsPublicPrefix(): string {
+        return rtrim((string) cfg('media_pipelines.hls_url_prefix', '/app/androidcast_project/media/hls'), '/');
+    }
+
+    /** @param array<string, mixed> $pipeline */
+    public static function workDir(array $pipeline): string {
+        $base = self::storageRoot() . '/pipelines/' . (int) $pipeline['id'];
+        if (!is_dir($base)) {
+            mkdir($base, 0755, true);
+        }
+        return $base;
+    }
+
+    /** @param array<string, mixed> $pipeline */
+    public static function probe(array $pipeline): array {
+        $root = self::scriptRoot();
+        $cmd = escapeshellcmd($root . '/bin/probe-source.sh') . ' '
+            . escapeshellarg((string) $pipeline['source_url']);
+        $out = [];
+        $code = 0;
+        exec($cmd . ' 2>&1', $out, $code);
+        $text = trim(implode("\n", $out));
+        if ($code !== 0) {
+            return ['ok' => false, 'error' => $text !== '' ? $text : 'probe failed'];
+        }
+        $json = json_decode($text, true);
+        if (!is_array($json)) {
+            return ['ok' => false, 'error' => 'invalid probe json', 'raw' => $text];
+        }
+        return ['ok' => true, 'probe' => $json];
+    }
+
+    /** @param array<string, mixed> $pipeline */
+    public static function start(array $pipeline): array {
+        if (!MediaPipelinesRepository::gateCanOperate()) {
+            return ['ok' => false, 'error' => 'forbidden'];
+        }
+        $id = (int) $pipeline['id'];
+        $work = self::workDir($pipeline);
+        $hlsSlug = (string) ($pipeline['hls_slug'] ?? ('p' . $id));
+        $hlsDir = self::hlsFilesystemRoot() . '/' . $hlsSlug;
+        $sourcesFile = $work . '/sources.list';
+        $sinksFile = $work . '/sinks.list';
+        $localEnv = $work . '/local.env';
+
+        $line = (string) $pipeline['source_url'];
+        if (!empty($pipeline['source_fmt'])) {
+            $line .= ' ' . (string) $pipeline['source_fmt'];
+        }
+        file_put_contents($sourcesFile, $line . "\n");
+
+        $defaultSinks = self::scriptRoot() . '/config/sinks.list';
+        if (is_readable($defaultSinks)) {
+            copy($defaultSinks, $sinksFile);
+        } else {
+            file_put_contents($sinksFile, "# no sinks\n");
+        }
+
+        $envLines = [
+            'SOURCES_LIST=' . $sourcesFile,
+            'SINKS_LIST=' . $sinksFile,
+            'STORAGE_DIR=' . $work,
+            'RUN_DIR=' . $work . '/run',
+            'HLS_OUTPUT_DIR=' . $hlsDir,
+            'LOGO_PATH=' . self::logoPath(),
+            'FILTER_PROFILE=' . (string) ($pipeline['filter_profile'] ?? 'default'),
+            'OUTPUT_PRESET=' . (string) ($pipeline['output_preset'] ?? '1080p'),
+            'YTDLP_ENABLED=' . (cfg('media_pipelines.ytdlp_enabled', true) ? '1' : '0'),
+        ];
+        if (!empty($pipeline['audio_source'])) {
+            $envLines[] = 'AUDIO_SOURCE=' . (string) $pipeline['audio_source'];
+        }
+        file_put_contents($localEnv, implode("\n", $envLines) . "\n");
+
+        MediaPipelinesRepository::updateStatus($id, 'starting');
+
+        self::writeWrapper($work, $runMode);
+
+        $cmd = 'nohup ' . escapeshellarg($work . '/invoke.sh')
+            . ' >> ' . escapeshellarg($work . '/runner.log') . ' 2>&1 & echo $!';
+        $pidLine = trim((string) shell_exec($cmd));
+        $pid = (int) $pidLine;
+
+        $hlsUrl = self::hlsPublicPrefix() . '/' . rawurlencode($hlsSlug) . '/index.m3u8';
+        MediaPipelinesRepository::updateRuntime($id, [
+            'status' => 'running',
+            'pid_encode' => $pid > 0 ? $pid : null,
+            'work_dir' => $work,
+            'hls_playlist_url' => $hlsUrl,
+            'last_error' => null,
+        ]);
+
+        return [
+            'ok' => true,
+            'pid' => $pid,
+            'hls_url' => $hlsUrl,
+            'work_dir' => $work,
+        ];
+    }
+
+    public static function stop(int $pipelineId, int $userId, int $companyId): array {
+        $pipeline = MediaPipelinesRepository::getById($pipelineId, $userId, $companyId);
+        if ($pipeline === null) {
+            return ['ok' => false, 'error' => 'not_found'];
+        }
+        MediaPipelinesRepository::updateStatus($pipelineId, 'stopping');
+        $root = self::scriptRoot();
+        $cmd = 'cd ' . escapeshellarg($root) . ' && '
+            . escapeshellcmd($root . '/bin/stop.sh') . ' 2>/dev/null; true';
+        exec($cmd);
+        foreach (['pid_encode', 'pid_fanout'] as $key) {
+            $pid = (int) ($pipeline[$key] ?? 0);
+            if ($pid > 0) {
+                exec('kill -15 ' . $pid . ' 2>/dev/null; kill -9 ' . $pid . ' 2>/dev/null');
+            }
+        }
+        MediaPipelinesRepository::updateRuntime($pipelineId, [
+            'status' => 'idle',
+            'pid_encode' => null,
+            'pid_fanout' => null,
+            'last_error' => null,
+        ]);
+        return ['ok' => true];
+    }
+
+    private static function writeWrapper(string $work, string $runMode): void {
+        $root = self::scriptRoot();
+        $script = $runMode === 'encode_only' ? 'run-encode-only.sh' : 'run.sh';
+        $wrapper = $work . '/invoke.sh';
+        $body = <<<'SH'
+#!/bin/sh
+set -eu
+WORK_DIR="@WORK@"
+ROOT="@ROOT@"
+if [ -f "${WORK_DIR}/local.env" ]; then
+  set -a
+  # shellcheck disable=SC1090
+  . "${WORK_DIR}/local.env"
+  set +a
+fi
+# shellcheck disable=SC1091
+. "${ROOT}/lib/common.sh"
+mkdir -p "${RUN_DIR:-${WORK_DIR}/run}"
+exec "${ROOT}/bin/@SCRIPT@" 1
+SH;
+        $body = str_replace(
+            ['@WORK@', '@ROOT@', '@SCRIPT@'],
+            [$work, $root, $script],
+            $body
+        );
+        file_put_contents($wrapper, $body);
+        chmod($wrapper, 0755);
+    }
+
+    /** @return list<string> */
+    public static function tailLog(array $pipeline, int $lines = 80): array {
+        $log = ($pipeline['work_dir'] ?? '') . '/encode.log';
+        if (!is_string($log) || !is_readable($log)) {
+            $log = self::storageRoot() . '/encode.log';
+        }
+        if (!is_readable($log)) {
+            return [];
+        }
+        $out = [];
+        exec('tail -n ' . (int) $lines . ' ' . escapeshellarg($log), $out);
+        return $out;
+    }
+}
diff --git a/sim/cluster0/lab-seeds/backend/src/MediaPipelinesRepository.php b/sim/cluster0/lab-seeds/backend/src/MediaPipelinesRepository.php
new file mode 100644
index 0000000..89a0778
--- /dev/null
+++ b/sim/cluster0/lab-seeds/backend/src/MediaPipelinesRepository.php
@@ -0,0 +1,185 @@
+<?php
+declare(strict_types=1);
+
+/**
+ * Experimental V.2x media pipelines — DB + access gate + CRUD.
+ * Control plane only; workers run streaming_v2 shell scripts on BE.
+ */
+final class MediaPipelinesRepository {
+    private static bool $schemaEnsured = false;
+
+    public static function gateAllowed(): bool {
+        if (!cfg('media_pipelines.enabled', false)) {
+            return false;
+        }
+        if (cfg('media_pipelines.developers_only', true)) {
+            return Rbac::isGlobalAdmin()
+                || Rbac::can('media_pipelines_view')
+                || Rbac::can('media_pipelines_operate');
+        }
+        return Auth::user() !== null;
+    }
+
+    public static function gateCanOperate(): bool {
+        if (!self::gateAllowed()) {
+            return false;
+        }
+        return Rbac::isGlobalAdmin() || Rbac::can('media_pipelines_operate');
+    }
+
+    public static function ensureSchema(): void {
+        if (self::$schemaEnsured) {
+            return;
+        }
+        $pdo = Database::pdo();
+        Database::withMigrationLock($pdo, 'media_pipelines', static function () use ($pdo): void {
+            if (Database::tableExists($pdo, 'media_pipelines')) {
+                return;
+            }
+            if (Database::isMysql()) {
+                $sql = file_get_contents(__DIR__ . '/../sql/migrations/081_media_pipelines.sql') ?: '';
+                if ($sql !== '') {
+                    $pdo->exec($sql);
+                }
+                return;
+            }
+            $sql = file_get_contents(__DIR__ . '/../sql/migrations/081_media_pipelines.sqlite.sql') ?: '';
+            if ($sql !== '') {
+                $pdo->exec($sql);
+            }
+        });
+        self::$schemaEnsured = true;
+    }
+
+    /** @return list<array<string, mixed>> */
+    public static function listForUser(int $userId, int $companyId): array {
+        self::ensureSchema();
+        $pdo = Database::pdo();
+        $stmt = $pdo->prepare(
+            'SELECT * FROM media_pipelines
+             WHERE company_id = ? AND owner_user_id = ?
+             ORDER BY updated_at DESC, id DESC
+             LIMIT 200'
+        );
+        $stmt->execute([$companyId, $userId]);
+        $rows = $stmt->fetchAll(PDO::FETCH_ASSOC);
+        return is_array($rows) ? array_map([self::class, 'normalizeRow'], $rows) : [];
+    }
+
+    public static function getById(int $id, int $userId, int $companyId): ?array {
+        self::ensureSchema();
+        $pdo = Database::pdo();
+        $stmt = $pdo->prepare(
+            'SELECT * FROM media_pipelines WHERE id = ? AND company_id = ? AND owner_user_id = ? LIMIT 1'
+        );
+        $stmt->execute([$id, $companyId, $userId]);
+        $row = $stmt->fetch(PDO::FETCH_ASSOC);
+        return is_array($row) ? self::normalizeRow($row) : null;
+    }
+
+    /** @param array<string, mixed> $input */
+    public static function create(int $userId, int $companyId, array $input): array {
+        self::ensureSchema();
+        $name = trim((string) ($input['name'] ?? 'Pipeline'));
+        $sourceUrl = trim((string) ($input['source_url'] ?? ''));
+        if ($sourceUrl === '') {
+            throw new InvalidArgumentException('source_url required');
+        }
+        $pdo = Database::pdo();
+        $stmt = $pdo->prepare(
+            'INSERT INTO media_pipelines
+             (company_id, owner_user_id, name, source_url, source_fmt, audio_source,
+              filter_profile, output_preset, run_mode, status, hls_slug)
+             VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)'
+        );
+        $hlsSlug = 'p' . bin2hex(random_bytes(8));
+        $stmt->execute([
+            $companyId,
+            $userId,
+            $name !== '' ? $name : 'Pipeline',
+            $sourceUrl,
+            self::nullOrTrim($input['source_fmt'] ?? null),
+            self::nullOrTrim($input['audio_source'] ?? null),
+            self::sanitizeProfile((string) ($input['filter_profile'] ?? 'default')),
+            self::sanitizePreset((string) ($input['output_preset'] ?? '1080p')),
+            self::sanitizeRunMode((string) ($input['run_mode'] ?? 'full')),
+            'idle',
+            $hlsSlug,
+        ]);
+        $id = (int) $pdo->lastInsertId();
+        $row = self::getById($id, $userId, $companyId);
+        if ($row === null) {
+            throw new RuntimeException('create failed');
+        }
+        return $row;
+    }
+
+    public static function updateStatus(int $id, string $status, ?string $error = null): void {
+        self::ensureSchema();
+        $pdo = Database::pdo();
+        $stmt = $pdo->prepare(
+            'UPDATE media_pipelines SET status = ?, last_error = ?, updated_at = CURRENT_TIMESTAMP WHERE id = ?'
+        );
+        $stmt->execute([$status, $error, $id]);
+    }
+
+    /** @param array<string, mixed> $fields */
+    public static function updateRuntime(int $id, array $fields): void {
+        self::ensureSchema();
+        $allowed = [
+            'status', 'pid_encode', 'pid_fanout', 'work_dir', 'record_path',
+            'hls_playlist_url', 'probe_json', 'last_error',
+        ];
+        $sets = [];
+        $vals = [];
+        foreach ($allowed as $key) {
+            if (array_key_exists($key, $fields)) {
+                $sets[] = "$key = ?";
+                $vals[] = $fields[$key];
+            }
+        }
+        if ($sets === []) {
+            return;
+        }
+        $sets[] = 'updated_at = CURRENT_TIMESTAMP';
+        $vals[] = $id;
+        $pdo = Database::pdo();
+        $pdo->prepare('UPDATE media_pipelines SET ' . implode(', ', $sets) . ' WHERE id = ?')->execute($vals);
+    }
+
+    /** @param array<string, mixed> $row */
+    private static function normalizeRow(array $row): array {
+        $row['id'] = (int) ($row['id'] ?? 0);
+        $row['company_id'] = (int) ($row['company_id'] ?? 1);
+        $row['owner_user_id'] = (int) ($row['owner_user_id'] ?? 0);
+        $row['pid_encode'] = isset($row['pid_encode']) ? (int) $row['pid_encode'] : null;
+        $row['pid_fanout'] = isset($row['pid_fanout']) ? (int) $row['pid_fanout'] : null;
+        if (!empty($row['probe_json']) && is_string($row['probe_json'])) {
+            $decoded = json_decode($row['probe_json'], true);
+            $row['probe'] = is_array($decoded) ? $decoded : null;
+        } else {
+            $row['probe'] = null;
+        }
+        return $row;
+    }
+
+    private static function nullOrTrim(mixed $v): ?string {
+        if ($v === null) {
+            return null;
+        }
+        $s = trim((string) $v);
+        return $s === '' ? null : $s;
+    }
+
+    private static function sanitizeProfile(string $p): string {
+        return in_array($p, ['default', 'blurred', 'nologo'], true) ? $p : 'default';
+    }
+
+    private static function sanitizePreset(string $p): string {
+        return in_array($p, ['1080p', '720p'], true) ? $p : '1080p';
+    }
+
+    private static function sanitizeRunMode(string $m): string {
+        return $m === 'encode_only' ? 'encode_only' : 'full';
+    }
+}
diff --git a/sim/cluster0/nginx/apps-port80.conf b/sim/cluster0/nginx/apps-port80.conf
index d73fe03..e9e814e 100644
--- a/sim/cluster0/nginx/apps-port80.conf
+++ b/sim/cluster0/nginx/apps-port80.conf
@@ -276,6 +276,18 @@ server {
 		client_max_body_size 512m;
 	}
 
+	# ── Media pipelines HLS (streaming_v2 experimental) ─────────────────────
+	location ^~ /app/androidcast_project/media/hls/ {
+		alias /var/www/ac/media-pipelines/hls/;
+		add_header Cache-Control "no-cache";
+		add_header Access-Control-Allow-Origin "*";
+		types {
+			application/vnd.apple.mpegurl m3u8;
+			video/mp2t ts;
+		}
+		default_type application/vnd.apple.mpegurl;
+	}
+
 	# ── SFU signaling — Janus Gateway WebRTC backend ─────────────────────────
 	# REST API → PHP signaling service
 	location /app/androidcast_project/sfu/api/ {
diff --git a/sim/cluster0/scripts/compose-lab-backend.sh b/sim/cluster0/scripts/compose-lab-backend.sh
index 80a32c1..cf9bed8 100755
--- a/sim/cluster0/scripts/compose-lab-backend.sh
+++ b/sim/cluster0/scripts/compose-lab-backend.sh
@@ -94,6 +94,40 @@ overlay_lab_seed_src() {
 }
 overlay_lab_seed_src ShortLinksRepository.php
 overlay_lab_seed_src UrlShortenerDatabase.php
+overlay_lab_seed_src MediaPipelinesRepository.php
+overlay_lab_seed_src MediaPipelineRunner.php
+
+overlay_lab_seed_api() {
+  _f="$1"
+  if [ -f "${LEGACY}/public/api/${_f}" ]; then
+    log "overlay lab-seed api ${_f}"
+    mkdir -p "${COMPOSED}/public/api"
+    cp -a "${LEGACY}/public/api/${_f}" "${COMPOSED}/public/api/"
+  fi
+}
+overlay_lab_seed_api media_pipelines.php
+
+overlay_lab_seed_public() {
+  _rel="$1"
+  if [ -f "${LEGACY}/public/${_rel}" ]; then
+    log "overlay lab-seed public/${_rel}"
+    mkdir -p "${COMPOSED}/public/$(dirname "$_rel")"
+    cp -a "${LEGACY}/public/${_rel}" "${COMPOSED}/public/${_rel}"
+  fi
+}
+overlay_lab_seed_public assets/js/media_pipelines.js
+overlay_lab_seed_public index.php
+
+overlay_lab_seed_sql() {
+  _f="$1"
+  if [ -f "${LEGACY}/sql/migrations/${_f}" ]; then
+    log "overlay lab-seed sql/migrations/${_f}"
+    mkdir -p "${COMPOSED}/sql/migrations"
+    cp -a "${LEGACY}/sql/migrations/${_f}" "${COMPOSED}/sql/migrations/"
+  fi
+}
+overlay_lab_seed_sql 081_media_pipelines.sql
+overlay_lab_seed_sql 081_media_pipelines.sqlite.sql
 
 overlay_api ac-ms-identity
 overlay_api ac-ms-rbac
@@ -253,9 +287,30 @@ return [
             ],
         ],
     ],
+    'media_pipelines' => [
+        'enabled' => true,
+        'developers_only' => true,
+        'script_root' => '${WS}/ac-ms-media-transcode',
+        'storage_root' => '/var/www/ac/media-pipelines',
+        'hls_url_prefix' => '/app/androidcast_project/media/hls',
+        'hls_filesystem_root' => '/var/www/ac/media-pipelines/hls',
+        'logo_path' => '${WS}/ac-ms-media-transcode/assets/pirate_drift.png',
+        'ytdlp_enabled' => true,
+    ],
 ];
 PHP
 
+MEDIA_ROOT="/var/www/ac/media-pipelines"
+MEDIA_HLS="${MEDIA_ROOT}/hls"
+MT_ROOT="${WS}/ac-ms-media-transcode"
+log "ensure media-pipelines dirs ${MEDIA_ROOT}"
+mkdir -p "${MEDIA_HLS}" "${MEDIA_ROOT}/pipelines"
+chown nginx:nginx "${MEDIA_ROOT}" "${MEDIA_HLS}" 2>/dev/null || true
+if [ -d "${MT_ROOT}/bin" ]; then
+  chmod +x "${MT_ROOT}"/bin/*.sh 2>/dev/null || true
+  log "media-transcode scripts at ${MT_ROOT} (logo: ${MT_ROOT}/assets/pirate_drift.png)"
+fi
+
 BUILD_CFG="${WS}/ac-be-builder/config/config.php"
 if [ -f "${COMPOSED}/config/config.php" ]; then
   log "write ac-be-builder config.php (shared cluster session + DB)"