May 12, 2026 · 3 min read
Turn Any MP3 Into a Lyric Video in 3 Minutes
Upload an audio URL. AI transcribes it. Flux paints a backdrop. Captions sync to the beat. That's it.
Lyric videos used to require a designer with motion graphics chops. Now it's a 3-minute job. Here's what actually happens between "paste an MP3 URL" and "mp4 in your downloads folder."
The pipeline, step by step
1. Audio fetch (~3s). You paste a direct mp3 URL (yours, with rights). Reviral pulls the file, checks it's under 25MB (our transcription upload cap), and stores a copy in our private bucket so the renderer doesn't depend on your CDN staying up.
2. Lyric transcription (~30s). Speech-to-text transcribes the audio with word-level timestamps. Each word gets a start + end time. If the track is instrumental the transcription returns nothing — we warn you and render with empty captions.
3. Backdrop generation (~5s). A flux/schnell model paints a single still image for the backdrop. We auto-derive a vibe prompt from the first lyric line, or you can override ("moonlit beach at midnight").
4. Composition (~2 min). Our cloud render pipeline combines: your audio on the audio track, the flux image as a static backdrop with a slow ken-burns push, and word-level karaoke captions synced to the transcript timestamps. Your captions highlight in time with the lyrics.
Why this works for short-form
Most lyric videos that go viral on TikTok / Reels are exactly this format: one striking backdrop, big karaoke-style captions that hit on the beat. The actual visual variation is doing very little work — the captions and the audio are the show. AI gen does well at this because it doesn't have to maintain character consistency across cuts.
Important: only your own music
Only upload audio you own or have licensed. Original songs, licensed tracks, and royalty-free music are all fair game — our terms require you to have the rights to any audio you use. If you're an artist promoting your own track, this works perfectly.
Try it
Sign up for Reviral (100 free credits), pick the "Lyric video" workflow on /app/create, paste your MP3 URL + a one-line vibe prompt for the backdrop. Render time is under 3 minutes for tracks 30-60 seconds long.