diff --git a/api/@ohos.multimedia.audio.d.ts b/api/@ohos.multimedia.audio.d.ts
index 9970a64dabd8d1d6632dcfc0ce5793c0aacf190f..f5f4de63350a0394da59e387a9da7ca07f918ab3 100644
--- a/api/@ohos.multimedia.audio.d.ts
+++ b/api/@ohos.multimedia.audio.d.ts
@@ -1385,6 +1385,20 @@ declare namespace audio {
      * @syscap SystemCapability.Multimedia.Audio.Renderer
      */
     getRenderRate(): Promise<AudioRendererRate>;
+    /**
+     * Set volume for audio renderer instance.
+     * @since 9
+     * @syscap SystemCapability.Multimedia.Audio.Renderer
+     * @initial
+     */
+    setVolume(volume: number, callback: AsyncCallback<void>): void;
+    /**
+     * Set volume for audio renderer instance.
+     * @since 9
+     * @syscap SystemCapability.Multimedia.Audio.Renderer
+     * @initial
+     */
+    setVolume(volume: number): Promise<void>;
     /**
      * Subscribes for audio interrupt event callback.
      * @param type Event type.
diff --git a/api/@ohos.multimedia.image.d.ts b/api/@ohos.multimedia.image.d.ts
index da3700eec7a52597c2696687190e670e9e4f6825..44a6580f8ecca2a74ea51044531ffd80ed325e49 100644
--- a/api/@ohos.multimedia.image.d.ts
+++ b/api/@ohos.multimedia.image.d.ts
@@ -158,6 +158,39 @@ declare namespace image {
     JPEG = 2000
   }
 
+  /**
+   * Enum for alpha type.
+   * @since 9
+   * @syscap SystemCapability.Multimedia.Image.Core
+   */
+  enum AlphaType {
+    /**
+     * Indicates an unknown alpha type.
+     * @since 9
+     * @syscap SystemCapability.Multimedia.Image.Core
+     */
+    UNKNOWN = 0,
+    /**
+     * Indicates that the image format does not include the alpha channel, or the alpha type of all pixels is opaque.
+     * @since 9
+     * @syscap SystemCapability.Multimedia.Image.Core
+     */
+    OPAQUE,
+    /**
+     * Indicates that the color channel of each pixel is premultiplied by the alpha channel value.
+     * @since 9
+     * @syscap SystemCapability.Multimedia.Image.Core
+     */
+    PREMUL,
+    /**
+     * Indicates that the color component of each pixel is independent from the alpha channel and is not
+     * premultiplied by the value.
+     * @since 9
+     * @syscap SystemCapability.Multimedia.Image.Core
+     */
+    UNPREMUL
+  }
+
   /**
    * The componet type of image.
    * @since 8
@@ -609,6 +642,26 @@ declare namespace image {
      */
     getPixelBytesNumber(): number;
 
+    /**
+     * Get pixel bytes Capacity.
+     * @since 9
+     * @syscap SystemCapability.Multimedia.Image.Core
+     */
+    getPixelBytesCapacity(): number;
+
+    /**
+     * Set alpha type.
+     * @since 9
+     * @syscap SystemCapability.Multimedia.Image.Core
+     */
+    setAlphaType(alphaType: AlphaType, callback: AsyncCallback<void>): void;
+    /**
+     * Set alpha type.
+     * @since 9
+     * @syscap SystemCapability.Multimedia.Image.Core
+     */
+    setAlphaType(alphaType: AlphaType): Promise<void>;
+
     /**
      * Releases this PixelMap object. This method uses a callback to return the result.
      * @since 7
diff --git a/api/@ohos.multimedia.media.d.ts b/api/@ohos.multimedia.media.d.ts
index c33f70bef3721965f684172ae32d90933aa3329b..da6b5d175fb55a0b8d164c56f6e515479df56b2e 100755
--- a/api/@ohos.multimedia.media.d.ts
+++ b/api/@ohos.multimedia.media.d.ts
@@ -14,6 +14,7 @@
 */
 
 import { ErrorCallback, AsyncCallback, Callback } from './basic';
+import audio from './@ohos.multimedia.audio';
 
 /**
  * @name media
@@ -269,6 +270,20 @@ declare namespace media {
     */
     getTrackDescription() : Promise<Array<MediaDescription>>;
 
+    /**
+     * Set audio renderer info for audio playback.
+     * @since 9
+     * @syscap SystemCapability.Multimedia.Media.AudioPlayer
+     */
+    setAudioRendererInfo(info: audio.AudioRendererInfo, callback: AsyncCallback<void>): void;
+
+    /**
+     * Set audio renderer info for audio playback
+     * @since 9
+     * @syscap SystemCapability.Multimedia.Media.AudioPlayer
+     */
+    setAudioRendererInfo(info: audio.AudioRendererInfo): Promise<void>;
+
     /**
      * Listens for audio playback buffering events.
      * @since 8
diff --git a/api/@ohos.multimedia.mediaLibrary.d.ts b/api/@ohos.multimedia.mediaLibrary.d.ts
index 32b8fd0b1add3e489963b3b240982c1344889f00..837c846ce6af974a975c0fe105c44060798c7659 100644
--- a/api/@ohos.multimedia.mediaLibrary.d.ts
+++ b/api/@ohos.multimedia.mediaLibrary.d.ts
@@ -1142,6 +1142,241 @@ declare namespace mediaLibrary {
      */
     TYPE_TV
   }
+
+  /**
+   * Create helper to extract metadata from media source.
+   * @since 9
+   * @syscap SystemCapability.Multimedia.MediaLibrary.Core
+   */
+  function createMediaMetadataHelper(context: Context) : MediaMetadataHelper;
+
+  /**
+   * Helper to extract metadata from media source.
+   * @since 9
+   * @syscap SystemCapability.Multimedia.MediaLibrary.Core
+   */
+  interface MediaMetadataHelper {
+    /**
+     * Set source by uri.
+     * @since 9
+     * @syscap SystemCapability.Multimedia.MediaLibrary.Core
+     */
+    setUriSource(uri: string, type: MediaType, callback: AsyncCallback<void>): void;
+
+    /**
+     * Set source by uri.
+     * @since 9
+     * @syscap SystemCapability.Multimedia.MediaLibrary.Core
+     */
+    setUriSource(uri: string, type: MediaType): Promise<void>;
+
+    /**
+     * Get output pixelmap from media source.
+     * @since 9
+     * @syscap SystemCapability.Multimedia.MediaLibrary.Core
+     */
+    getPixelMap(options: PixelMapOptions, callback: AsyncCallback<image.PixelMap>): Promise<void>;
+
+    /**
+     * Get output pixelmap from media source.
+     * @since 9
+     * @syscap SystemCapability.Multimedia.MediaLibrary.Core
+     */
+    getPixelMap(options: PixelMapOptions): Promise<image.PixelMap>;
+
+    /**
+     * Get metadata by key.
+     * @since 9
+     * @syscap SystemCapability.Multimedia.MediaLibrary.Core
+     */
+    getMetadataValue(key: MetadataCode, callback: AsyncCallback<string>): void;
+
+    /**
+     * Get metadata by key.
+     * @since 9
+     * @syscap SystemCapability.Multimedia.MediaLibrary.Core
+     */
+    getMetadataValue(key: MetadataCode): Promise<string>;
+
+    /**
+     * Release helper.
+     * @since 9
+     * @syscap SystemCapability.Multimedia.MediaLibrary.Core
+     */
+    release(callback: AsyncCallback<void>): void;
+
+    /**
+     * Release helper.
+     * @since 9
+     * @syscap SystemCapability.Multimedia.MediaLibrary.Core
+     */
+    release(): Promise<void>;
+  }
+
+  /**
+   * Options for output pixelmap
+   * @since 9
+   * @syscap SystemCapability.Multimedia.MediaLibrary.Core
+   */
+  interface PixelMapOptions {
+    /**
+     * Output format
+     * @since 9
+     * @syscap SystemCapability.Multimedia.MediaLibrary.Core
+     */
+    format: image.PixelMapFormat;
+    /**
+     * Select type for frame
+     * @since 9
+     * @syscap SystemCapability.Multimedia.MediaLibrary.Core
+     */
+    selectType: SelectType;
+    /**
+     * Select index.
+     * @since 9
+     * @syscap SystemCapability.Multimedia.MediaLibrary.Core
+     */
+    index: number;
+    /**
+     * Select time.
+     * @since 9
+     * @syscap SystemCapability.Multimedia.MediaLibrary.Core
+     */
+    time: number;
+
+    /**
+     * Target size.
+     * @since 9
+     * @syscap SystemCapability.Multimedia.MediaLibrary.Core
+     */
+    size?: Size;
+  }
+
+  /**
+   * Type for select frame
+   * @since 9
+   * @syscap SystemCapability.Multimedia.MediaLibrary.Core
+   */
+  enum SelectType {
+    /**
+     * Select by default value.
+     * @since 9
+     * @syscap SystemCapability.Multimedia.MediaLibrary.Core
+     */
+    SELECT_TYPE_DEFAULT = 0,
+    /**
+     * Select by index.
+     * @since 9
+     * @syscap SystemCapability.Multimedia.MediaLibrary.Core
+     */
+    SELECT_TYPE_INDEX,
+    /**
+     * Select by time.
+     * @since 9
+     * @syscap SystemCapability.Multimedia.MediaLibrary.Core
+     */
+    SELECT_TYPE_TIME
+  }
+
+  /**
+   * Meta data key code
+   * @since 9
+   * @syscap SystemCapability.Multimedia.MediaLibrary.Core
+   */
+  enum MetadataCode {
+    /**
+     * Retrieves data sources of the MIME types. MIME types include video/mp4, audio/mp4,
+     * and audio/amr-wb.
+     * @since 9
+     * @syscap SystemCapability.Multimedia.MediaLibrary.Core
+     */
+    AV_KEY_MIMETYPE = 0,
+
+    /**
+     * Retrieves the number of audio tracks (such as audio, video, and text) in a data source
+     * (such as an MP4 or 3GPP file).
+     * @since 9
+     * @syscap SystemCapability.Multimedia.MediaLibrary.Core
+     */
+    AV_KEY_NUM_TRACKS = 1,
+
+    /**
+     * Retrieves whether the media contains audio.
+     * @since 9
+     * @syscap SystemCapability.Multimedia.MediaLibrary.Core
+     */
+    AV_KEY_HAS_AUDIO = 2,
+
+    /**
+     * Retrieves whether the media contains video.
+     * @since 9
+     * @syscap SystemCapability.Multimedia.MediaLibrary.Core
+     */
+    AV_KEY_HAS_VIDEO = 3,
+
+    /**
+     * Retrieves the playback duration (in milliseconds) of a data source.
+     * @since 9
+     * @syscap SystemCapability.Multimedia.MediaLibrary.Core
+     */
+    AV_KEY_DURATION = 4,
+
+    /**
+     * Retrieves the title of a data source.
+     * @since 9
+     * @syscap SystemCapability.Multimedia.MediaLibrary.Core
+     */
+    AV_KEY_TITLE = 5,
+
+    /**
+     * Retrieves the date when a data source was created or modified.
+     * @since 9
+     * @syscap SystemCapability.Multimedia.MediaLibrary.Core
+     */
+    AV_KEY_DATE = 6,
+
+    /**
+     * Retrieves the video width of the media containing video.
+     * @since 9
+     * @syscap SystemCapability.Multimedia.MediaLibrary.Core
+     */
+    AV_KEY_VIDEO_WIDTH = 7,
+
+    /**
+     * Retrieves the video height of the media containing video.
+     * @since 9
+     * @syscap SystemCapability.Multimedia.MediaLibrary.Core
+     */
+    AV_KEY_VIDEO_HEIGHT = 8,
+
+    /**
+     * Retrieves the video rotation angle, in degrees, if any. The rotation angle can be 0, 90, 180, or 270 degrees.
+     * @since 9
+     * @syscap SystemCapability.Multimedia.MediaLibrary.Core
+     */
+    AV_KEY_VIDEO_ROTATION = 9,
+
+    /**
+     * Retrieves the average bitrate, in bits per second, if any.
+     * @since 9
+     * @syscap SystemCapability.Multimedia.MediaLibrary.Core
+     */
+    AV_KEY_BITRATE = 10,
+
+    /**
+     * Retrieves the sampling rate, if any.
+     * @since 9
+     * @syscap SystemCapability.Multimedia.MediaLibrary.Core
+     */
+    AV_KEY_SAMPLE_RATE = 11,
+
+    /**
+     * Retrieves each sampling bit, if any.
+     * @since 9
+     * @syscap SystemCapability.Multimedia.MediaLibrary.Core
+     */
+    AV_KEY_BITS_PER_SAMPLE = 12,
+  }
 }
 
 export default mediaLibrary;