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Migration: probe video durations with ffprobe during assignment-to-playlist conversion

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Videos were getting the default 10s from the assignments table. Now ffprobe
runs for each video content item during migration, backfills the content
table, and uses the real duration in playlist_items.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
This commit is contained in:
ScreenTinker 2026-04-11 22:21:40 -05:00
parent aca1558702
commit aee6766c4c
1 changed files with 51 additions and 12 deletions
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63
server/db/database.js
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@ -115,6 +115,30 @@ function migrateAssignmentsToPlaylists() {
console.log(`Migrating ${devicesWithAssignments.length} device(s) from assignments to playlists...`);
// Probe video duration with ffprobe (synchronous — fine for one-time migration)
const { execFileSync } = require('child_process');
function probeVideoDuration(content) {
if (!content || !content.mime_type || !content.mime_type.startsWith('video/')) return null;
if (content.duration_sec) return Math.ceil(content.duration_sec);
if (!content.filepath) return null;
try {
const fullPath = path.join(config.contentDir, content.filepath);
const stdout = execFileSync('ffprobe', [
'-v', 'quiet', '-print_format', 'json', '-show_format', fullPath
], { timeout: 15000 });
const info = JSON.parse(stdout);
if (info.format?.duration) {
const dur = parseFloat(info.format.duration);
// Backfill the content table too
db.prepare('UPDATE content SET duration_sec = ? WHERE id = ?').run(dur, content.id);
return Math.ceil(dur);
}
} catch (e) {
console.warn(` ffprobe failed for ${content.id}:`, e.message);
}
return null;
}
const insertPlaylist = db.prepare(`
INSERT INTO playlists (id, user_id, name, description, is_auto_generated)
VALUES (?, ?, ?, ?, 1)
@ -125,22 +149,37 @@ function migrateAssignmentsToPlaylists() {
`);
const setDevicePlaylist = db.prepare('UPDATE devices SET playlist_id = ? WHERE id = ?');
const getAssignments = db.prepare(`
SELECT content_id, widget_id, sort_order, duration_sec
FROM assignments
WHERE device_id = ? AND enabled = 1
ORDER BY sort_order ASC
SELECT a.content_id, a.widget_id, a.sort_order, a.duration_sec,
c.mime_type, c.filepath, c.duration_sec as content_duration
FROM assignments a
LEFT JOIN content c ON a.content_id = c.id
WHERE a.device_id = ? AND a.enabled = 1
ORDER BY a.sort_order ASC
`);
const migrate = db.transaction(() => {
for (const device of devicesWithAssignments) {
const playlistId = uuidv4();
insertPlaylist.run(playlistId, device.user_id, `${device.name} (migrated)`, 'Auto-generated from previous assignments');
const assignments = getAssignments.all(device.id);
for (const a of assignments) {
insertItem.run(playlistId, a.content_id || null, a.widget_id || null, a.sort_order, a.duration_sec);
// Probe durations outside the transaction (ffprobe can't run inside SQLite transaction)
const devicePlaylists = [];
for (const device of devicesWithAssignments) {
const playlistId = uuidv4();
const assignments = getAssignments.all(device.id);
const items = assignments.map(a => {
let duration = a.duration_sec;
if (a.content_id && a.mime_type?.startsWith('video/')) {
const probed = probeVideoDuration({ id: a.content_id, mime_type: a.mime_type, filepath: a.filepath, duration_sec: a.content_duration });
if (probed) duration = probed;
}
return { content_id: a.content_id, widget_id: a.widget_id, sort_order: a.sort_order, duration_sec: duration };
});
devicePlaylists.push({ device, playlistId, items });
}
// Insert everything in a single transaction
const migrate = db.transaction(() => {
for (const { device, playlistId, items } of devicePlaylists) {
insertPlaylist.run(playlistId, device.user_id, `${device.name} (migrated)`, 'Auto-generated from previous assignments');
for (const item of items) {
insertItem.run(playlistId, item.content_id || null, item.widget_id || null, item.sort_order, item.duration_sec);
}
setDevicePlaylist.run(playlistId, device.id);
}
});