public static final class MediaFormat.QpOffsetRect
extends Object



QpOffsetRect constitutes the metadata required for encoding a region of interest in an image or a video frame. The region of interest is represented by a rectangle. The four integer coordinates of the rectangle are stored in fields left, top, right, bottom. Note that the right and bottom coordinates are exclusive. This is paired with a suggestive qp offset information that is to be used during encoding of the blocks belonging to the to the box.

Summary

Public constructors

QpOffsetRect(Rect contour, int qpOffset)

Create a new region of interest with the specified coordinates and qpOffset.

Public methods

String flattenToString()
static String flattenToString(List<MediaFormat.QpOffsetRect> qpOffsetRects)
void set(Rect contour, int qpOffset)

Update the region of interest information with the specified coordinates and qpOffset

Inherited methods

From class java.lang.Object

Object clone()

Creates and returns a copy of this object.

boolean equals(Object obj)

Indicates whether some other object is "equal to" this one.

void finalize()

Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.

final Class<?> getClass()

Returns the runtime class of this Object.

int hashCode()

Returns a hash code value for the object.

final void notify()

Wakes up a single thread that is waiting on this object's monitor.

final void notifyAll()

Wakes up all threads that are waiting on this object's monitor.

String toString()

Returns a string representation of the object.

final void wait(long timeoutMillis, int nanos)

Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.

final void wait(long timeoutMillis)

Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.

final void wait()

Causes the current thread to wait until it is awakened, typically by being notified or interrupted.

Public constructors

QpOffsetRect

public QpOffsetRect (Rect contour, 
                int qpOffset)

Create a new region of interest with the specified coordinates and qpOffset. Note: no range checking is performed, so the caller must ensure that left >= 0, left <= right, top >= 0 and top <= bottom. Note that the right and bottom coordinates are exclusive.

Parameters
contour Rect: Rectangle specifying the region of interest.
This value cannot be null.
qpOffset int: qpOffset to be used for the blocks in the specified rectangle

Public methods

set

public void set (Rect contour, 
                int qpOffset)

Update the region of interest information with the specified coordinates and qpOffset

Parameters
contour Rect: Rectangle specifying the region of interest.
This value cannot be null.
qpOffset int: qpOffset to be used for the blocks in the specified rectangle

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Last updated 2026-02-13 UTC.