VideoLookAtCamera

VideoLookAtCamera#

Creates a video object for saving mp4 videos from model simulations.

Listing 10 Include this file this file to use#
#include "<AMMR_TOOLS>\ModelUtilities/Video/VideoLookAtCamera.any"`

#VideoLookAtCamera#

Class creating a video camera for video recording of AnyBody simulations.

Usage

Once the model is loaded run Create_Video operation to create the Video. The video will be saved in the same folder as the main file.

  #include "<ANYBODY_PATH_MODELUTILS>/Video/VideoLookAtCamera.any"

  // This is a simple example of using the camera class to create videos.
  VideoLookAtCamera MyCam (UP_DIRECTION = y) = 
  {
       // The point the camera focus on  
       CameraLookAtPoint = Main.MyModel.Femur.Knee.r;  

       // The vertical field of view in meters at the LookAtPoint
       CameraFieldOfView = 1;

       // The direction which the camera is placed
       // (In global coordinates with respect to the LookAtPoint)
       CameraDirection = {1, 1, -1};

       // The operations which should be included in the video.
       Analysis = {
           AnyOperation &ref = Main.MyStudy.InverseDynamics;
       };
   };

Full signature

VideoLookAtCamera <ObjectName>(
  UP_DIRECTION=y,
  CREATE_GIF=0,
  ENABLE_OVERLAY=1,
) = {};

Arguments

__CLASS__:

AnyFolder

UP_DIRECTION:

The direction of the up vector of the camera. (Default: y)

CREATE_GIF:

If set to 1, a gif will be created in addition to the video. (Default: 0)

ENABLE_OVERLAY:

If set to 1, the settings used to create the video will be saved in a file. (Default: 1)

Optional initialization members

VideoName = ANYBODY_NAME_MAINFILE;
class type:

AnyString

File name of the video that will be created

VideoResolution = {1920,1080};
class type:

AnyIntArray

Video resolution in pixels: Defaults to FullHD Width of the video in pixels

ConstantRateFactor = 30;
class type:

AnyIntVar

From FFMPEG: The range of the quantizer scale is 0-51: where 0 is lossless, and 51 is worst possible. A lower value is a higher quality.

VideoInputScale = 1;
class type:

AnyFloat

The ratio between video resolution and input images saved
from anybody. Default is to save images in same resolution as the output video. It is an advantage to set this to 2 or 4 when making videos with a low resolution

VideoCodec = "libvpx-vp9";
class type:

AnyString

The video codec ffmepg will use to create the video. Choose “libxvid” for best for compatibility (eg. with PowerPoint) or “libvpx-vp9” for best performance

VideoStartFrame = 0;
class type:

AnyInt

This is the start frame used when creating Videos. This can be used to for skipping some of the initial frames.

OverlayImage = _ANYBODY_OVERLAY_LOGO_;
class type:

AnyString

Image used to overlay (e.g. logo) on the final video

OverlayImageScale = 0.08;
class type:

AnyVar

Height of the overlay image in percent of the video

VideoPathFFMPEG = _CAMERA_FFMPEG_DEFAULT_PATH_;
class type:

AnyStringVar

The path to the ffmpeg binary.

VideoInputFrameRate = 24;
class type:

AnyIntVar

Determines the speed of the video. Setting it to nStep/(tEnd-tStart) make the video run in real time.

VideoOutputFrameRate = 24;
class type:

AnyIntVar

Video output framerate.

VideoOutputPath = _CAMERA_MAIN_FILE_DIRECTORY_;
class type:

AnyStringVar

The output path where the video is saved

CameraLookAtPoint = DesignVar({0,1,0});
class type:

AnyVec3

The point the camera focus on

CameraDistance = DesignVar(6);
class type:

AnyVar

The distance from the camera to the scene. This does NOT determine the size of scene, since Perspective is off by default. To zoom in/out, use CameraFeildOfView.

CameraFieldOfView = DesignVar(2);
class type:

AnyVar

The vertical field of view in meters at the LookAtPoint

BackgroundColor = DesignVar({1,1,1});
class type:

AnyVec3

The background color used for the video

Counter = Camera.Recorder.Counter;
class type:

AnyInt

Counter for numbering the saved images. This defaults to the camera class builtin counter.

GifResolution = {min({VideoResolution[0],600}),min({VideoResolution[1],600})};
class type:

AnyIntArray

The resolution used when converting the video to a gif file. By default it will follow video resolution up until 600x600.

GifOutputFrameRate = VideoOutputFrameRate;
class type:

AnyIntVar

Video output framerate.

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