diff --git a/multimedia/av_codec/native_avcodec_base.h b/multimedia/av_codec/native_avcodec_base.h
index b26dc245406ae0c5f92e005a9b396e34784f57b8..d084e00ba6425f711daa846d18bba597acaf97ec 100644
--- a/multimedia/av_codec/native_avcodec_base.h
+++ b/multimedia/av_codec/native_avcodec_base.h
@@ -150,6 +150,37 @@ typedef struct OH_AVCodecCallback {
     OH_AVCodecOnNewOutputBuffer onNewOutputBuffer;
 } OH_AVCodecCallback;
 
+/**
+ * @brief The function pointer will be called to get sequenced media data.
+ * @syscap SystemCapability.Multimedia.Media.CodecBase
+ * @param data The buffer to fill.
+ * @param length Length of data to read.
+ * @param offset Start offset to read.
+ * @return Actual length of data read to the buffer.
+ * @since 12
+*/
+typedef int32_t (*OH_AVDataSourceReadAt)(OH_AVBuffer *data, int32_t length, int64_t offset);
+
+/**
+ * @brief User customized data source.
+ * @syscap SystemCapability.Multimedia.Media.CodecBase
+ * @since 12
+*/
+typedef struct OH_AVDataSource {
+    /**
+     * @brief Total size of the data source.
+     * @syscap SystemCapability.Multimedia.Media.CodecBase
+     * @since 12
+     */
+    int64_t size;
+    /**
+     * @brief Data callback of the data source.
+     * @syscap SystemCapability.Multimedia.Media.CodecBase
+     * @since 12
+     */
+    OH_AVDataSourceReadAt readAt;
+} OH_AVDataSource;
+
 /**
  * @brief Enumerates the MIME types of audio and video codecs
  * @syscap SystemCapability.Multimedia.Media.CodecBase
diff --git a/multimedia/av_codec/native_avsource.h b/multimedia/av_codec/native_avsource.h
index 5a9e71e0c9fe39f6861b8d5790326b884e703e3b..a8dca0837f1305b45bb72dbbbea1387c3adc056f 100644
--- a/multimedia/av_codec/native_avsource.h
+++ b/multimedia/av_codec/native_avsource.h
@@ -27,6 +27,15 @@ extern "C" {
 
 typedef struct OH_AVSource OH_AVSource;
 
+/**
+ * @brief Creates an OH_AVSource instance that models the media with data source.
+ * @syscap SystemCapability.Multimedia.Media.Spliter
+ * @param dataSource User customized media resource.
+ * @return Returns a pointer to an OH_AVSource instance
+ * @since 12
+*/
+OH_AVSource *OH_AVSource_CreateWithDataSource(OH_AVDataSource *dataSource);
+
 /**
  * @brief Creates an OH_AVSource instance that models the media at the URI.
  * @syscap SystemCapability.Multimedia.Media.Spliter
diff --git a/multimedia/player_framework/avplayer.h b/multimedia/player_framework/avplayer.h
index e8db017f06a7689d127e9966c8a6faa63271472b..f6da162bd0907756d7b39a760c66771d82431867 100644
--- a/multimedia/player_framework/avplayer.h
+++ b/multimedia/player_framework/avplayer.h
@@ -97,6 +97,21 @@ OH_AVErrCode OH_AVPlayer_SetFDSource(OH_AVPlayer *player, int32_t fd, int64_t of
  */
 OH_AVErrCode OH_AVPlayer_Prepare(OH_AVPlayer *player);
 
+/**
+ * @brief Prepares the playback environment and buffers media data asynchronous, at specific timestamp.
+ *
+ * This function must be called after {@link SetSource}.
+ *
+ * @syscap SystemCapability.Multimedia.Media.AVPlayer
+ * @param player Pointer to an OH_AVPlayer instance.
+ * @param mSeconds Timestamp to be prepared at.
+ * @return Returns {@link AV_ERR_OK} if {@link Prepare} is successfully added to the task queue;
+ * returns an error code defined in {@link native_averrors.h} otherwise.
+ * @since 12
+ * @version 1.0
+ */
+OH_AVErrCode OH_AVPlayer_PrepareAt(OH_AVPlayer *player, int32_t mSeconds);
+
 /**
  * @brief Start playback.
  *
diff --git a/multimedia/player_framework/avplayer_base.h b/multimedia/player_framework/avplayer_base.h
index 1283b920441672bd4c75b2b2fe31de60c63b2668..99490ae9c82016c05749b414681d44f1042a3976 100644
--- a/multimedia/player_framework/avplayer_base.h
+++ b/multimedia/player_framework/avplayer_base.h
@@ -83,6 +83,12 @@ typedef enum AVPlayerSeekMode {
     AV_SEEK_NEXT_SYNC = 0,
     /* sync to keyframes before the time point. */
     AV_SEEK_PREVIOUS_SYNC,
+    /**
+     * @brief Sync to frames closest to the time point.
+     * @syscap SystemCapability.Multimedia.Media.AVPlayer
+     * @since 12
+     */
+    AV_SEEK_CLOSEST = 2,
 } AVPlayerSeekMode;
 
 /**
@@ -102,6 +108,24 @@ typedef enum AVPlaybackSpeed {
     AV_SPEED_FORWARD_1_75_X,
     /* Video playback at 2.0x normal speed */
     AV_SPEED_FORWARD_2_00_X,
+    /**
+     * @brief Video playback at 0.5x normal speed.
+     * @syscap SystemCapability.Multimedia.Media.AVPlayer
+     * @since 12
+     */
+    AV_SPEED_FORWARD_0_50_X,
+    /**
+     * @brief Video playback at 1.5x normal speed.
+     * @syscap SystemCapability.Multimedia.Media.AVPlayer
+     * @since 12
+     */
+    AV_SPEED_FORWARD_1_50_X,
+    /**
+     * @brief Video playback at 3.0x normal speed.
+     * @syscap SystemCapability.Multimedia.Media.AVPlayer
+     * @since 12
+     */
+    AV_SPEED_FORWARD_3_00_X,
 } AVPlaybackSpeed;
 
 /**