AI Voiceover · AI Captions · 500,000 CC0 Tracks · Logo Overlay
Add Music — and AI Voiceover,
Captions & Logo — to Your Video
500,000 CC0 music tracks, AI voiceover from 14 local voices, Whisper auto-captions, and logo overlay — all in one render. Drop your MP4, add what you need, download the finished version. No editing software, no per-minute fees.
1 free render — no card needed · $5/mo or $36/yr after · Cancel anytime
See it in action — a real render
Want to test with a real input file? Open the live sample animation →
How it works
Drop your video
.mp4 · .mov · .webm
→
Pick a free track
500,000 CC0 songs · or upload
→
Download finished video
MP4 or GIF · all aspect ratios
Features
Everything you need to soundtrack a video
AI voiceover — 14 voices, local
Type a script and Kokoro TTS narrates your video in one of 14 English voices. Auto-ducks music ~8 dB during speech via FFmpeg sidechain — voice on top, track underneath. Runs on-server; your script never touches ElevenLabs or OpenAI.
AI captions from Whisper
Local Whisper (small.en) transcribes your video's speech and burns time-synced captions into frames. Four styles. No per-minute API charge — included in the $5/month flat rate alongside all other features.
500,000 CC0 tracks, any genre
Search Freesound's CC0 catalog from inside Animation Machine — cinematic, lo-fi, upbeat, ambient, corporate. No attribution required. Mood-based one-click pills or keyword search. Music auto-loops or trims to your video's exact duration.
Upload your own audio
MP3, M4A, WAV, AAC, or FLAC. Drop your file and Animation Machine shows duration and an inline preview before you render. Syncs the same way as a searched track — looped or trimmed to fit exactly.
Logo overlay in any corner
Drop a PNG logo — transparent or opaque — and it composites cleanly onto every frame. Four corner positions, size slider (5–40% of width), opacity slider (20–100%). Stacks with captions, voiceover, and music in one pass.
Any aspect ratio, 720p to 4K
720p, 1080p, 4K, portrait (TikTok/Reels), or square (Instagram/LinkedIn). H.264 or H.265. CRF quality from Draft to Max. Batch render up to 3 videos at once.
FAQ
Adding Music to Video — Common Questions
What video formats can I add music to?
Animation Machine accepts MP4, MOV, M4V, and WebM video files. Drop the file in the dropzone, pick a track or upload your own audio, and the result is a finished video with the audio mixed in.
Where does the music come from?
Animation Machine pulls from Freesound's CC0 catalog — over 500,000 royalty-free tracks you can use commercially without attribution. You can also upload your own audio file (MP3, M4A, WAV, AAC, FLAC) if you have a track you'd rather use.
Can I use the music commercially?
Yes. The Freesound library Animation Machine searches is filtered to CC0 (public domain) tracks only. CC0 means no copyright restrictions and no attribution required — you can use the resulting videos in ads, products, social posts, and client work.
How do I find the right music for my video?
The music panel has mood pills — Cinematic, Upbeat, Lo-fi, Corporate, Dramatic, Ambient, Playful, Epic, Chill — for fast browsing. One click runs a search and shows preview-able tracks. You can also type a custom keyword if you have something specific in mind.
Will the music match my video's length?
Yes. Animation Machine automatically loops or trims the audio so it ends exactly when your video ends. You won't get a track that cuts off mid-beat or runs over the end.
Can I adjust the music volume?
Yes. The volume slider in the music panel sets the music level — 10% by default, which is a good baseline for background music behind dialogue or motion. Push it up to 100% for music-led videos with no narration.
Does the original audio in my video get removed?
When you add a new music track, it replaces the original audio. If you want to keep the original audio and skip music entirely, just don't pick a track — the render will run without modifying the audio decision.
What output formats are available?
MP4 (H.264 or H.265) for best quality and compatibility, or GIF for messaging and silent looping. Resolution options: 720p, 1080p, 4K, plus portrait and square aspect ratios for social platforms.
How much does it cost?
Animation Machine is $5 per month with unlimited renders — no per-export fees, no length cap, no watermarks. Cancel anytime from your account settings.
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