StableAvatar
StableAvatar makes avatar videos that can go on as long as needed. It runs on its own from start to finish. You give it a picture and some audio, and it spits out video with no extra editing.
Overview
StableAvatar takes a single image and a voice track and turns them into a talking avatar video that can go on forever. It keeps your face and voice in sync without needing any tools afterward. No face swaps no patch jobs. Just feed it your stuff and it spits out clean results.
This thing came out of a team at Fudan University Microsoft Research Asia Xi’an Jiaotong University and Tencent Hunyuan. The official writeup landed on arXiv on August 11 2025 if you're into papers.
How StableAvatar works
Time-step-aware Audio Adapter. This handles audio syncing by changing how the voice gets mixed in over time so it doesn’t drift off.
Audio Native Guidance. The model looks at its own predictions as it goes and tweaks itself to stay on track with the audio.
Dynamic Weighted Sliding‑Window Strategy. This helps it blend frames together smoothly so there’s no weird jumps between video chunks.
So far it's doing better than older methods at keeping faces consistent and voices synced up even on long clips. The paper backs that with numbers and side-by-side comparisons. And since it runs end-to-end you don’t need to babysit the process.
The basic Wan2.1-1.3B model can make endless videos at 480x832, 832x480 or 512x512 size. If your memory runs low, just lower the frame count or shrink the size.
Tags
Freeware MIT License PC-based #Video & AnimationLinks
This tool is free to use when installed locally and is offered under MIT License.
Comparing StableAvatar to MultiTalk people say MultiTalk starts strong but doesn’t hold up through the whole clip. It looks great at first, better than most, but video quality gets worse the longer it runs. StableAvatar stays more steady but doesn’t look as sharp.
Some folks prefer MultiTalk for its solid mouth shapes and expressions. Others say it’s still the best for short runs but drops in quality later. A few noticed it gets darker over time, while StableAvatar stays pretty much the same.
FantasyTalking? Most agree it’s all over the place. Funny, glitchy... even psychedelic-esqe. Not very usable.
People like the acting in MultiTalk but admit it starts falling apart. Hallo3 is seen as a more steady option if you don’t need flashy visuals. StableAvatar’s lower on the list but still usable.
[ Reddit ]
Useful Links
No additional links available for this tool.
This page was last updated on August 13, 2025 at 6:31 AM