Public Member Functions
boolean	onCaptureVideoFrame (int sourceType, VideoFrame videoFrame)
	Occurs each time the SDK receives a video frame captured by local devices. More...

boolean	onPreEncodeVideoFrame (int sourceType, VideoFrame videoFrame)
	Occurs each time the SDK receives a video frame before encoding. More...

boolean	onMediaPlayerVideoFrame (VideoFrame videoFrame, int mediaPlayerId)

int	getVideoFrameProcessMode ()
	Occurs each time the SDK receives a video frame and prompts you to set the process mode of the video frame. More...

int	getVideoFormatPreference ()
	Sets the format of the raw video data output by the SDK. More...

boolean	getRotationApplied ()
	Occurs each time the SDK receives a video frame, and prompts you whether to rotate the captured video. More...

boolean	getMirrorApplied ()
	Occurs each time the SDK receives a video frame and prompts you whether or not to mirror the captured video. More...

int	getObservedFramePosition ()
	Sets the frame position for the video observer. More...

boolean	onRenderVideoFrame (String channelId, int uid, VideoFrame videoFrame)
	Occurs each time the SDK receives a video frame sent by the remote user. More...

Public Attributes
int	PROCESS_MODE_READ_ONLY = 0

int	PROCESS_MODE_READ_WRITE = 1

int	POSITION_POST_CAPTURER = 1

int	POSITION_PRE_RENDERER = 1 << 1

int	POSITION_PRE_ENCODER = 1 << 2

int	VIDEO_PIXEL_DEFAULT = 0

int	VIDEO_PIXEL_I420 = 1

int	VIDEO_PIXEL_BGRA = 2

int	VIDEO_PIXEL_NV21 = 3

int	VIDEO_PIXEL_RGBA = 4

int	VIDEO_PIXEL_NV12 = 8

int	VIDEO_TEXTURE_2D = 10

int	VIDEO_TEXTURE_OES = 11

int	VIDEO_PIXEL_I422 = 16

int	VIDEO_PIXEL_I010 = 18

Member Function Documentation

◆ onCaptureVideoFrame()

boolean io.agora.rtc2.video.IVideoFrameObserver.onCaptureVideoFrame	(	int	sourceType,
		VideoFrame	videoFrame
	)

Occurs each time the SDK receives a video frame captured by local devices.

You can get raw video data collected by the local device through this callback and preprocess it as needed. Once the preprocessing is complete, you can directly modify videoFrame in this callback, and set the return value to true to send the modified video data to the SDK. If you need to send the preprocessed data to the SDK, you need to call getVideoFrameProcessMode first to set the video processing mode to read and write mode ( PROCESS_MODE_READ_WRITE ). Applicable scenarios: - Preprocess the locally collected video data before it is processed by the SDK. For example, get video data through this callback and process it with filters, watermarks, cropping, rotation, etc.

Get information about the locally collected video data before it is processed by the SDK. For example, the original width, height, frame rate of the video frame, etc. Call timing: After the successful registration of the video data observer, each time the SDK captures a video frame.

Note

If the video data type you get is RGBA, the SDK does not support processing the data of the alpha channel.
It is recommended that you ensure the modified parameters in videoFrame are consistent with the actual situation of the video frames in the video frame buffer. Otherwise, it may cause unexpected rotation, distortion, and other issues in the local preview and remote video display. The default video format that you get from this callback may be I420Buffer or TextureBuffer. The texture format of TextureBuffer can be either 0ES format or RGB format. If you need video data in other formats, you can set the expected data format in the return value of the getVideoFormatPreference callback.

Parameters

sourceType	Video source types, including cameras, screens, or media player. See `VideoSourceType`.
videoFrame	The video frame. See `VideoFrame`.Note: The default value of the video frame data format obtained through this callback is as follows: Android: I420 or RGB (GLES20.GL_TEXTURE_2D)

Returns

When the video processing mode is PROCESS_MODE_READ_ONLY:
- true: Reserved for future use.
- false: Reserved for future use.
When the video processing mode is PROCESS_MODE_READ_WRITE:
- true: Sets the SDK to receive the video frame.
- false: Sets the SDK to discard the video frame.

◆ onPreEncodeVideoFrame()

boolean io.agora.rtc2.video.IVideoFrameObserver.onPreEncodeVideoFrame	(	int	sourceType,
		VideoFrame	videoFrame
	)

Occurs each time the SDK receives a video frame before encoding.

After you successfully register the video frame observer, the SDK triggers this callback each time it receives a video frame. In this callback, you can get the video data before encoding and then process the data according to your particular scenarios. After processing, you can send the processed video data back to the SDK in this callback.

Note

If you need to send the preprocessed data to the SDK, you need to call getVideoFrameProcessMode first to set the video processing mode to read and write mode ( PROCESS_MODE_READ_WRITE ).
To get the video data captured from the second screen before encoding, you need to set VIDEO_MODULE_POSITION_PRE_ENCODER (1 << 2) as a frame position through getObservedFramePosition.
The video data that this callback gets has been preprocessed, with its content cropped and rotated, and the image enhanced.
It is recommended that you ensure the modified parameters in videoFrame are consistent with the actual situation of the video frames in the video frame buffer. Otherwise, it may cause unexpected rotation, distortion, and other issues in the local preview and remote video display.

Parameters

sourceType	The type of the video source. See `VideoSourceType`.
videoFrame	The video frame. See `VideoFrame`.Note: The default value of the video frame data format obtained through this callback is as follows: Android: I420 or RGB (GLES20.GL_TEXTURE_2D)

Returns

When the video processing mode is PROCESS_MODE_READ_ONLY:
- true: Reserved for future use.
- false: Reserved for future use.
When the video processing mode is PROCESS_MODE_READ_WRITE:
- true: Sets the SDK to receive the video frame.
- false: Sets the SDK to discard the video frame.

◆ onMediaPlayerVideoFrame()

boolean io.agora.rtc2.video.IVideoFrameObserver.onMediaPlayerVideoFrame	(	VideoFrame	videoFrame,
		int	mediaPlayerId
	)

Occurs each time the SDK receives a video frame decoded by the MediaPlayer.

After you successfully register the video frame observer, the SDK triggers this callback each time a video frame is decoded. In this callback, you can get the video data decoded by the MediaPlayer. You can then pre-process the data according to your scenarios.

After pre-processing, you can send the processed video data back to the SDK by setting the videoFrame parameter in this callback.

Note

This callback will not be affected by the return values of getVideoFrameProcessMode, getRotationApplied, getMirrorApplied, getObservedFramePosition.
On Android, this callback is not affected by the return value of getVideoFormatPreference

Parameters

videoFrame	A pointer to the video frame: VideoFrame
mediaPlayerId	of the mediaPlayer.

Returns

Determines whether to ignore the current video frame if the pre-processing fails:

true: Do not ignore.
false: Ignore, in which case this method does not sent the current video frame to the SDK.

◆ getVideoFrameProcessMode()

int io.agora.rtc2.video.IVideoFrameObserver.getVideoFrameProcessMode ( )

Occurs each time the SDK receives a video frame and prompts you to set the process mode of the video frame.

After you successfully register the video frame observer, the SDK triggers this callback each time it receives a video frame. You need to set your preferred process mode in the return value of this callback.

Returns

The process mode of the video frame:

PROCESS_MODE_READ_ONLY (0): (Default) Only reads the video frame.
PROCESS_MODE_READ_WRITE (1): Reads and writes the video frame.

◆ getVideoFormatPreference()

int io.agora.rtc2.video.IVideoFrameObserver.getVideoFormatPreference ( )

Sets the format of the raw video data output by the SDK.

You need to register the callback when calling the registerVideoFrameObserver method. After you successfully register the video frame observer, the SDK triggers this callback each time it receives a video frame. You need to set your preferred video data in the return value of this callback.

Note

The default types of pixel format ( VIDEO_PIXEL_DEFAULT ) for the raw video are as follows:

On the Android platform, the default video frame type may be I420Buffer or TextureBuffer. The texture format of TextureBuffer type may be OES or RGB. If the returned video frame type is VIDEO_PIXEL_DEFAULT when you call getVideoFormatPreference, you need to adapt to I420Buffer or TextureBuffer when processing video data. The cases where the video frame type is fixed as I420Buffer include but are not limited to:
- Specific devices, such as: LG G5 SE (H848), Google Pixel 4a, Samsung Galaxy A7, or Xiaomi Mi Max.
- Image enhancement extension has been integrated and video noise reduction or low-light enhancement function has been enabled.

Returns

Sets the raw data format of the SDK output.

VIDEO_PIXEL_DEFAULT (0): Raw video.
VIDEO_PIXEL_I420 (1): I420.
VIDEO_PIXEL_RGBA (4): RGBA.
VIDEO_PIXEL_I422 (16): I422.

◆ getRotationApplied()

boolean io.agora.rtc2.video.IVideoFrameObserver.getRotationApplied ( )

Occurs each time the SDK receives a video frame, and prompts you whether to rotate the captured video.

If you want to rotate the captured video according to the rotation member in the VideoFrame class, ensure that you register this callback when calling registerVideoFrameObserver. After you successfully register the video frame observer, the SDK triggers this callback each time it receives a video frame. You need to set whether to rotate the video frame in the return value of this callback.

Note: On the Android platform, the supported video data formats for this callback are: I420, RGBA, and Texture.

Returns

Sets whether to rotate the captured video:

true: Rotate the captured video.
false: (Default) Do not rotate the captured video.

◆ getMirrorApplied()

boolean io.agora.rtc2.video.IVideoFrameObserver.getMirrorApplied ( )

Occurs each time the SDK receives a video frame and prompts you whether or not to mirror the captured video.

If the video data you want to obtain is a mirror image of the original video, you need to register this callback when calling registerVideoFrameObserver. After you successfully register the video frame observer, the SDK triggers this callback each time it receives a video frame. You need to set whether or not to mirror the video frame in the return value of this callback.

Note

On the Android platform, the supported video data formats for this callback are: I420, RGBA, and Texture.
Both this method and the setVideoEncoderConfiguration method support setting the mirroring effect. Agora recommends that you only choose one method to set it up. Using both methods at the same time causes the mirroring effect to overlap, and the mirroring settings fail.

Returns

Sets whether or not to mirror the captured video:

true: Mirror the captured video.
false: (Default) Do not mirror the captured video.

◆ getObservedFramePosition()

int io.agora.rtc2.video.IVideoFrameObserver.getObservedFramePosition ( )

Sets the frame position for the video observer.

After successfully registering the video data observer, the SDK uses this callback to determine whether to trigger onCaptureVideoFrame, onRenderVideoFrame and onPreEncodeVideoFrame callback at each specific video frame processing position, so that you can observe the locally collected video data, the video data sent by the remote end, and the video data before encoding. You can set one or more positions you need to observe by modifying the return value according to your scenario:

VIDEO_MODULE_POSITION_POST_CAPTURER (1 << 0): The position after capturing the video data, which corresponds to the onCaptureVideoFrame callback.
VIDEO_MODULE_POSITION_PRE_RENDERER (1 << 1): The position of the received remote video data before rendering, which corresponds to the onRenderVideoFrame callback.
VIDEO_MODULE_POSITION_PRE_ENCODER (1 << 2): The position before encoding the video data, which corresponds to the onPreEncodeVideoFrame callback.

Note

Use '|' (the OR operator) to observe multiple frame positions.
This callback observes VIDEO_MODULE_POSITION_POST_CAPTURER (1 << 0) and VIDEO_MODULE_POSITION_PRE_RENDERER (1 << 1) by default.
To conserve system resources, you can reduce the number of frame positions that you want to observe.
When the video processing mode is PROCESS_MODE_READ_WRITE and the observation position is set to VIDEO_MODULE_POSITION_PRE_ENCODER | VIDEO_MODULE_POSITION_POST_CAPTURER, the getMirrorApplied does not take effect; you need to modify the video processing mode or the position of the observer.

Returns

A bit mask that controls the frame position of the video observer.

VIDEO_MODULE_POSITION_POST_CAPTURER (1 << 0): The position after capturing the video data, which corresponds to the onCaptureVideoFrame callback.
VIDEO_MODULE_POSITION_PRE_RENDERER (1 << 1): The position of the received remote video data before rendering, which corresponds to the onRenderVideoFrame callback.
VIDEO_MODULE_POSITION_PRE_ENCODER (1 << 2): The position before encoding the video data, which corresponds to the onPreEncodeVideoFrame callback.

◆ onRenderVideoFrame()

boolean io.agora.rtc2.video.IVideoFrameObserver.onRenderVideoFrame	(	String	channelId,
		int	uid,
		VideoFrame	videoFrame
	)

Occurs each time the SDK receives a video frame sent by the remote user.

After you successfully register the video frame observer, the SDK triggers this callback each time it receives a video frame. In this callback, you can get the video data sent from the remote end before rendering, and then process it according to the particular scenarios. The default video format that you get from this callback may be I420Buffer or TextureBuffer. The texture format of TextureBuffer can be either 0ES format or RGB format. If you need video data in other formats, you can set the expected data format in the return value of the getVideoFormatPreference callback.

Note

If you need to send the preprocessed data to the SDK, you need to call getVideoFrameProcessMode first to set the video processing mode to read and write mode ( PROCESS_MODE_READ_WRITE ).
If the video data type you get is RGBA, the SDK does not support processing the data of the alpha channel.
It is recommended that you ensure the modified parameters in videoFrame are consistent with the actual situation of the video frames in the video frame buffer. Otherwise, it may cause unexpected rotation, distortion, and other issues in the local preview and remote video display.

Parameters

uid	The user ID of the remote user who sends the current video frame.
videoFrame	The video frame. See `VideoFrame`.Note: The default value of the video frame data format obtained through this callback is as follows: Android: I420 or RGB (GLES20.GL_TEXTURE_2D)
channelId	The channel ID.

Returns

When the video processing mode is PROCESS_MODE_READ_ONLY:
- true: Reserved for future use.
- false: Reserved for future use.
When the video processing mode is PROCESS_MODE_READ_WRITE:
- true: Sets the SDK to receive the video frame.
- false: Sets the SDK to discard the video frame.

Member Data Documentation

◆ PROCESS_MODE_READ_ONLY

int io.agora.rtc2.video.IVideoFrameObserver.PROCESS_MODE_READ_ONLY = 0

Observer works as a pure renderer and will not modify the original frame.

◆ PROCESS_MODE_READ_WRITE

int io.agora.rtc2.video.IVideoFrameObserver.PROCESS_MODE_READ_WRITE = 1

Observer works as a filter that will process the video frame and affect the following frame processing in SDK.

◆ POSITION_POST_CAPTURER

int io.agora.rtc2.video.IVideoFrameObserver.POSITION_POST_CAPTURER = 1

The position after capturing the video data, which corresponds to the onCaptureVideoFrame callback.

◆ POSITION_PRE_RENDERER

int io.agora.rtc2.video.IVideoFrameObserver.POSITION_PRE_RENDERER = 1 << 1

The position before receiving the remote video data, which corresponds to the onRenderVideoFrame callback.

◆ POSITION_PRE_ENCODER

int io.agora.rtc2.video.IVideoFrameObserver.POSITION_PRE_ENCODER = 1 << 2

The position before encoding the video data, which corresponds to the onPreEncodeVideoFrame callback.

◆ VIDEO_PIXEL_DEFAULT

int io.agora.rtc2.video.IVideoFrameObserver.VIDEO_PIXEL_DEFAULT = 0

0: Default format.

◆ VIDEO_PIXEL_I420

int io.agora.rtc2.video.IVideoFrameObserver.VIDEO_PIXEL_I420 = 1

1: I420.

◆ VIDEO_PIXEL_BGRA

int io.agora.rtc2.video.IVideoFrameObserver.VIDEO_PIXEL_BGRA = 2

2: BGRA.

◆ VIDEO_PIXEL_NV21

int io.agora.rtc2.video.IVideoFrameObserver.VIDEO_PIXEL_NV21 = 3

3: NV21.

◆ VIDEO_PIXEL_RGBA

int io.agora.rtc2.video.IVideoFrameObserver.VIDEO_PIXEL_RGBA = 4

4: RGBA.

◆ VIDEO_PIXEL_NV12

int io.agora.rtc2.video.IVideoFrameObserver.VIDEO_PIXEL_NV12 = 8

8: NV12.

◆ VIDEO_TEXTURE_2D

int io.agora.rtc2.video.IVideoFrameObserver.VIDEO_TEXTURE_2D = 10

10: GL_TEXTURE_2D

◆ VIDEO_TEXTURE_OES

int io.agora.rtc2.video.IVideoFrameObserver.VIDEO_TEXTURE_OES = 11

11: GL_TEXTURE_OES

◆ VIDEO_PIXEL_I422

int io.agora.rtc2.video.IVideoFrameObserver.VIDEO_PIXEL_I422 = 16

16: I422.

◆ VIDEO_PIXEL_I010

int io.agora.rtc2.video.IVideoFrameObserver.VIDEO_PIXEL_I010 = 18

18: I010. 10bit I420 data. @technical preview

Public Member Functions

Public Attributes

Member Function Documentation

◆ onCaptureVideoFrame()

◆ onPreEncodeVideoFrame()

◆ onMediaPlayerVideoFrame()

◆ getVideoFrameProcessMode()

◆ getVideoFormatPreference()

◆ getRotationApplied()

◆ getMirrorApplied()

◆ getObservedFramePosition()

◆ onRenderVideoFrame()

Member Data Documentation

◆ PROCESS_MODE_READ_ONLY

◆ PROCESS_MODE_READ_WRITE

◆ POSITION_POST_CAPTURER

◆ POSITION_PRE_RENDERER

◆ POSITION_PRE_ENCODER

◆ VIDEO_PIXEL_DEFAULT

◆ VIDEO_PIXEL_I420

◆ VIDEO_PIXEL_BGRA

◆ VIDEO_PIXEL_NV21

◆ VIDEO_PIXEL_RGBA

◆ VIDEO_PIXEL_NV12

◆ VIDEO_TEXTURE_2D

◆ VIDEO_TEXTURE_OES

◆ VIDEO_PIXEL_I422

◆ VIDEO_PIXEL_I010