org.opensourcephysics.media.core

Interface Video

All Superinterfaces:

Drawable, DrawableImage, Interactive, InteractiveImage, Measurable, Playable, Trackable

All Known Implementing Classes:

GifVideo, ImageVideo, VideoAdapter

public interface Video
extends InteractiveImage, Playable, Trackable

This defines methods to control a video image sequence. Individual images within the sequence are referred to as frames.

Version:

1.0

Author:

Douglas Brown

Method Summary

Methods

Modifier and Type	Method and Description
void	back() Steps backward in the video.
void	dispose() Disposes of this video.
int	getEndFrameNumber() Gets the end frame number.
int	getFrameCount() Gets the total number of frames.
double	getFrameDuration(int n) Gets the duration of the specified frame in milliseconds.
int	getFrameNumber() Gets the current frame number.
double	getFrameTime(int n) Gets the start time of the specified frame in milliseconds.
int	getStartFrameNumber() Gets the start frame number.
void	setEndFrameNumber(int n) Sets the end frame number.
void	setFrameAngle(int n, double angle) Sets the angle in radians of the specified video frame measured ccw from the world x-axis.
void	setFrameHeight(int n, double height) Sets the height of the specified video frame in world units.
void	setFrameNumber(int n) Sets the frame number.
void	setFrameRelativeAspect(int n, double relativeAspect) Sets the relative aspect of the specified video frame.
void	setFrameWidth(int n, double width) Sets the width of the specified video frame in world units.
void	setFrameX(int n, double x) Sets x position of UL corner of the specified video frame in world units.
void	setFrameXY(int n, double x, double y) Sets the x and y position of the UL corner of the specified video frame in world units.
void	setFrameY(int n, double y) Sets y position of UL corner of the specified video frame in world units.
void	setStartFrameNumber(int n) Sets the start frame number.
void	step() Steps forward in the video.

Methods inherited from interface org.opensourcephysics.media.core.InteractiveImage

getAngle, getCoords, getHeight, getRelativeAspect, getWidth, setAngle, setCoords, setHeight, setRelativeAspect, setWidth

Methods inherited from interface org.opensourcephysics.display.Interactive

findInteractive, getX, getY, isEnabled, setEnabled, setX, setXY, setY

Methods inherited from interface org.opensourcephysics.display.Measurable

getXMax, getXMin, getYMax, getYMin, isMeasured

Methods inherited from interface org.opensourcephysics.display.Drawable

draw

Methods inherited from interface org.opensourcephysics.media.core.DrawableImage

getFilterStack, getImage, getProperty, getPropertyNames, isVisible, setFilterStack, setProperty, setVisible

Methods inherited from interface org.opensourcephysics.media.core.Playable

addPropertyChangeListener, addPropertyChangeListener, getDuration, getEndTime, getRate, getStartTime, getTime, goToEnd, goToStart, isLooping, isPlaying, play, removePropertyChangeListener, removePropertyChangeListener, reset, setEndTime, setLooping, setPlaying, setRate, setStartTime, setTime, stop

Method Detail

step

void step()

Steps forward in the video.

back

void back()

Steps backward in the video.

getFrameCount

int getFrameCount()

Gets the total number of frames.

Returns:

the number of frames in the image sequence

getFrameNumber

int getFrameNumber()

Gets the current frame number.

Returns:

the number of the current frame

setFrameNumber

void setFrameNumber(int n)

Sets the frame number.

Parameters:

n - a number between getStartFrameNumber() and getEndFrameNumber()

See Also:

getStartFrameNumber(), getEndFrameNumber()

getStartFrameNumber

int getStartFrameNumber()

Gets the start frame number.

Returns:

the number of the start frame

See Also:

getEndFrameNumber()

setStartFrameNumber

void setStartFrameNumber(int n)

Sets the start frame number.

Parameters:

n - a number between 0 and getEndFrameNumber()

See Also:

setEndFrameNumber(int)

getEndFrameNumber

int getEndFrameNumber()

Gets the end frame number.

Returns:

the number of the end frame

See Also:

getStartFrameNumber()

setEndFrameNumber

void setEndFrameNumber(int n)

Sets the end frame number.

Parameters:

n - a number between getStartFrameNumber() and getFrameCount()

See Also:

setStartFrameNumber(int)

getFrameTime

double getFrameTime(int n)

Gets the start time of the specified frame in milliseconds.

Parameters:

n - the frame number

Returns:

the start time of the frame in milliseconds

getFrameDuration

double getFrameDuration(int n)

Gets the duration of the specified frame in milliseconds.

Parameters:

n - the frame number

Returns:

the duration of the frame in milliseconds

setFrameX

void setFrameX(int n,
             double x)

Sets x position of UL corner of the specified video frame in world units.

Parameters:

n - the video frame number

x - the world x position

setFrameY

void setFrameY(int n,
             double y)

Sets y position of UL corner of the specified video frame in world units.

Parameters:

n - the video frame number

y - the world y position

setFrameXY

void setFrameXY(int n,
              double x,
              double y)

Sets the x and y position of the UL corner of the specified video frame in world units.

Parameters:

n - the video frame number

x - the world x position

y - the world y position

setFrameRelativeAspect

void setFrameRelativeAspect(int n,
                          double relativeAspect)

Sets the relative aspect of the specified video frame. The pixel aspect of an image is the ratio of its pixel width to height. Its world aspect is the ratio of width to height in world units. For example, a 320 x 240 pixel image has a pixel aspect of 4/3. If its relative aspect is set to 2, then the world aspect of the image will be 8/3. This means that if the image width is set to 16, its height will be 6. Conversely, if its height is set to 10, its width will be 8/3 x 10 = 26.666.

Parameters:

n - the video frame number

relativeAspect - the world aspect of the image relative to its pixel aspect.

setFrameWidth

void setFrameWidth(int n,
                 double width)

Sets the width of the specified video frame in world units. This method also sets the height using the relative aspect.

Parameters:

n - the video frame number

width - the width in world units

setFrameHeight

void setFrameHeight(int n,
                  double height)

Sets the height of the specified video frame in world units. This method also sets the width using the relative aspect.

Parameters:

n - the video frame number

height - the height in world units

setFrameAngle

void setFrameAngle(int n,
                 double angle)

Sets the angle in radians of the specified video frame measured ccw from the world x-axis.

Parameters:

n - the video frame number

angle - the angle n radians

dispose

void dispose()

Disposes of this video.