Convert BVH to MOT

Understanding BVH and MOT file formats

BVH (Biovision Hierarchy) is a widely used file format for storing motion capture data. It contains both the skeleton hierarchy and the motion data, making it popular in animation, game development, and research. MOT files, on the other hand, are typically used in 3D animation software such as MikuMikuDance (MMD) to store motion data for models. While both formats represent motion, their structure and application differ, necessitating conversion for compatibility.

Why convert BVH to MOT?

Converting BVH to MOT is essential when you want to use motion capture data from BVH sources in applications that require the MOT format, such as MMD. This allows for greater flexibility and reuse of motion data across different platforms and software.

How to convert BVH to MOT

There is no direct, universal converter for BVH to MOT, but the process can be accomplished using a combination of software tools:

1. Use MikuMikuMoving or MMD tools: Import the BVH file into MikuMikuMoving or MikuMikuDance using the File → Import → BVH option. This will apply the motion data to a model.
2. Export as MOT: Once the motion is applied, use the File → Export → MOT or Save Motion feature to save the motion data in MOT format.

Alternatively, you can use VMD Converter tools to convert BVH to VMD (another MMD motion format) and then use MMD to save as MOT if supported.

Recommended software for BVH to MOT conversion

• MikuMikuMoving – User-friendly and supports direct BVH import and MOT export.
• MikuMikuDance (MMD) – Popular for motion editing and exporting in various formats.
• VMD Converter – Useful for intermediate conversion steps if direct export is not available.

Tips for successful conversion

• Ensure the skeleton structure in the BVH file matches the target model in MMD or MikuMikuMoving.
• Check for motion alignment and adjust bone mapping if necessary before exporting as MOT.
• Test the exported MOT file in your target application to verify motion accuracy.