BVH motion capture data

Motion capture data is a two-dimensional representation of motion that takes place in a three-dimensional world. A popular way to store such data to represent human motion is the Biovision Hierarchy (BVH for short) file format.

A BVH file contains ASCII text, the first part of which provides the specifications for the initial pose of a human skeleton, and the rest a time-framed sequence of different specifications for subsequent poses.

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Headed by the keyword HIERARCHY, the first part of a BVH file identifies the Hips joint as the ROOT, which is to say it has no parent-joint. This is the starting point of a nested-structure of parent-joints and child-joints.

Figure 1: BVH skeletal structure

Source: Meredith, M. & Maddock, S. (2001) Motion Capture File Formats Explained.

The ROOT section specifies the location of the Hips joint in a three-dimensional space. Below the ROOT section in the structure are JOINT sections, each containing information that specifies the location of the skeletal joint relative to its parent-joint. The relative location specifications for a parent-joint and its child-joint makes it possible to work out the length of the “bone” between the two joints. Where a joint has no child-joint, it is linked to an End Site section.

Bvh Player Download

The ROOT section and each of the JOINT sections also specifies the CHANNELS for processing the time-framed sequence of translation and/or rotational co-ordinates provided in the second part of the BVH file.

Figure 2: BVH file (part 1)

Source: Meredith, M. & Maddock, S. (2001) Motion Capture File Formats Explained.

The second part of a BVH file starts with the keyword MOTION, followed by information specifying, first, the number of FRAMES; second, the sampling rate per second after the keyword FRAME TIME; and third, a number of lines corresponding to the number of FRAMES, each line providing the tranlation and/or rotation co-ordinates to be processed according to the CHANNELS specifications in the first part of the file.

Figure 3: BVH file (part 2)

Source: Meredith, M. & Maddock, S. (2001) Motion Capture File Formats Explained.

Figure 4 below shows frame 0 of the jump-rope normal run-yokoyama.bvh file as as viewed by using the BvhViewer freeware.

Figure 4: BvhViewer display of frame 0 of jump-rope normal run-yokoyama.bvh

Figure 5 below shows frame 0 of the same jump-rope normal run-yokoyama.bvh filed as viewed by using the QuickMotView 1.0 software.

Figure 5: QuickMotView 1.0 display of frame 0 of jump-rope normal run-yokoyama.bvh

Figure 6 below shows frame 1 of the same jump-rope normal run-yokoyama.bvh file with the Chest joint highlighted and as viewed by using the bvhacker 1.2 software.

Figure 6: bvhacker 1.2 display of frame 0 of jump-rope normal run-yokoyama.bvh

For a video demonstration visit: https://youtu.be/zG0nW0x-xZ4 (v1.0)

New to version 3.2 - Compatibility with Anypose BVH (v1.8 or later) to export full body and finger poses! Link at bottom of description.

New to version 3.0 - Mirror feature to copy your left to right hand or reverse. Also added BVH export support (PRO version only)

New to version 2.5 - Thumb second joint twist added (for better Maitreya support), Minimise UI improvements, Preset Transfer Support

New to version 2.0 - More poses, More presets, UI Improvements, Puppeteer feature, custom AO feature! To receive the free update visit the mainstore location delivery terminal.

An unfortunate reality of hands in Second Life is that for too long they have been limited to just a couple of built in poses which can cause issues for great photography or interacting with objects in a realistic manner.

With this in mind I created this Hand Poser HUD to provide a simple and intuitive interface for posing your Bento enabled hands in a position that works best for your needs.

This HUD requires Bento enabled hands to work.

Step 1. Wear the FATE Hand Poser HUD

Step 2. Simply click and drag sliders on the HUD to pose them

FEATURES

1. Export your Pose (PRO version only)
You can now export your custom bento hand poses with the click of a button. Simply pose your fingers then press the export button, follow the link in chat and save the page as a .bvh file to your computer. Poses will be available for download for at least 30 days.

Bvh Download Blender

2. Save Your Pose
To save your current finger poses simply click the 'save' button on any of the presets. Click the preset button to apply it in the future.

Bvh File Download

3. Puppeteer
You can now animate other avatar's hands, this is great for photographers with multiple avatars to pose. Simply click the Puppeteer button and select a nearby avatar. That avatar will need to accept animation permissions and also be wearing bento enabled hands.

Download Bvh Files For Blender

4. AO
You can now use your FATE Hand Poser HUD as a custom bento hand animation override. Click the 'AO Settings' button and click 'LIST' on the popup menu to configure which preset poses are used in the AO. Your avatar will switch to a random pose in this list during random intervals (as long as the HUD is attached).

Bvh Motion Files

5. Minimise/Maximise
The FATE Hand Poser HUD now has more UI control, allowing a full minimise and maximise of the HUD, Hand Controllers or Presets Panels individually to allow for greater visibility, you can also scale the HUD to your own preferences using the build tools.

For best results, disable any built in AO for your bento hands through their HUD or by manually stopping your animations.

Free Bvh Animations

Anypose BVH: https://marketplace.secondlife.com/p/AnyPose-BVH-Pose-Stand-Includes-AnyPose-Animator/774336