StableAvatar AI generates infinite-length avatar videos from a single photo and audio, achieving perfect lip-sync and natural expressions without post-processing. Upload a JPG, PNG, or WEBP photo (up to 10 MB) and an MP3, WAV, or M4A audio file (up to 15 seconds), and the browser-based tool produces 720p talking-head videos in 100–300 seconds.
What is StableAvatar AI?
StableAvatar AI is a web-based AI video generation tool that takes a reference photo of a person and an audio track (speech, singing, or other vocal content) and outputs an infinite-length avatar video. It uses a diffusion transformer architecture with a Time-step-aware Audio Adapter to maintain lip-sync and facial identity across arbitrarily long segments. The platform is developed and hosted by StableAvatar AI.
Key Features
- Infinite-Length Generation — Creates videos of any duration without quality degradation, using a Dynamic Weighted Sliding-window Strategy to fuse latent representations over time.
- Perfect Audio Synchronization — Achieves precise lip-sync by leveraging the diffusion model’s evolving joint audio–latent prediction as a dynamic guidance signal.
- Identity Preservation — Maintains the subject’s facial features and expressions across hours of content without drift.
- Multi-Person Support — Handles multiple faces in a single scene, animating each according to the audio with coordinated timing.
- Natural Expression Generation — Produces realistic head movements, eye blinks, and gestures that match the audio’s emotional content.
- Scene Animation — Animates background elements, clothing, and environmental details for complete realism.
- 720p Output — Exports videos at 720p resolution (higher resolutions available in paid plans).
- Credit-Based Usage — Each 5-second video consumes 180 credits; 10 seconds costs 360 credits; 15 seconds costs 540 credits.
Who is it for?
- Business presenters — Create professional talking-head presentations from a single photo and script audio.
- Educational content creators — Generate virtual instructors with perfect synchronization for entire lectures.
- Marketing teams — Produce brand ambassador videos for campaigns without repeated filming.
- Entertainment producers — Animate characters for stories or interactive content with natural movements.
What can you do with StableAvatar AI?
- Business presentations — Upload a professional headshot and a recorded script to generate a polished presentation video with natural gestures and lip-sync.
- Educational videos — Turn a lecturer’s photo and lesson audio into an engaging virtual instructor for e-learning platforms.
- Marketing campaigns — Create spokesperson videos from a single photo and marketing script audio, with consistent branding.
- Entertainment content — Animate characters for videos or games with realistic facial expressions and movements that match any audio track.
How does StableAvatar AI work?
- Upload a photo and audio — Provide a reference image containing a face and an audio file of speech, singing, or other vocal content (max 15 seconds).
- Generate the avatar video — The system analyzes the audio for timing, emotion, phonetics, and rhythm, then feeds it into a diffusion transformer with a Time-step-aware Audio Adapter. The model generates video frames with correct lip-sync and expressions.
- Download the output — After 100–300 seconds of processing, the 720p avatar video is ready to download and use.
Pricing
StableAvatar AI offers three monthly subscription plans:
- Basic — $29.9/month, 1000 credits, 720p resolution, standard quality, basic editing tools.
- Standard — $39.9/month, 1500 credits, up to 1080p resolution, advanced quality, priority support, commercial license.
- Pro — $89.9/month, 5000 credits, up to 1080p resolution, advanced quality, expert support, commercial license. A yearly billing option is also available.
FAQ
What is StableAvatar AI?
StableAvatar AI is a web-based tool that generates realistic avatar videos of infinite length from a single photo and audio. It creates talking heads with perfect lip-sync, natural expressions, and identity preservation without needing video editing or post-processing.
How do I use StableAvatar AI?
Upload a photo (JPG, PNG, WEBP, up to 10 MB) and an audio file (MP3, WAV, M4A, up to 15 seconds). Click "Generate Avatar Video Now" and wait 100–300 seconds for your 720p video to be ready. Credits are consumed per generation (180 credits for 5 seconds).
Can I use StableAvatar AI for commercial projects?
Yes, commercial use is allowed under the Standard and Pro plans. The Basic plan does not include a commercial license.
How are credits calculated?
Each avatar video generation consumes 180 credits for a 5-second video, 360 credits for 10 seconds, and 540 credits for 15 seconds. Longer videos consume multiples based on the 5-second bucket.
What makes StableAvatar AI different from other avatar generators?
StableAvatar AI focuses on infinite-length generation without quality decay, uses a custom Time-step-aware Audio Adapter to prevent error accumulation across segments, and handles multi-person scenes natively. Upload limits are 15 seconds per audio, but generated videos can be arbitrarily long.
