diff --git a/multimedia/av_codec/avsource/libnative_media_avsource.ndk.json b/multimedia/av_codec/avsource/libnative_media_avsource.ndk.json
index 759d6231b53d524399f267a0c0eb8ed218710359..ab7e2240d01653c78cb9ad545860cd8e08870372 100644
--- a/multimedia/av_codec/avsource/libnative_media_avsource.ndk.json
+++ b/multimedia/av_codec/avsource/libnative_media_avsource.ndk.json
@@ -3,6 +3,10 @@
         "first_introduced": "12",
         "name": "OH_AVSource_CreateWithDataSource"
     },
+    {
+        "first_introduced": "20",
+        "name": "OH_AVSource_CreateWithDataSourceExt"
+    },
     {
         "first_introduced": "10",
         "name": "OH_AVSource_CreateWithURI"
diff --git a/multimedia/av_codec/native_avcodec_base.h b/multimedia/av_codec/native_avcodec_base.h
index 67075d05f5650463704f7c7db7ff32423dcc0490..47f71c6a4b5db8dbf9d57564a7ca099a7862cbdd 100644
--- a/multimedia/av_codec/native_avcodec_base.h
+++ b/multimedia/av_codec/native_avcodec_base.h
@@ -212,6 +212,34 @@ typedef struct OH_AVDataSource {
     OH_AVDataSourceReadAt readAt;
 } OH_AVDataSource;
 
+/**
+ * @brief the function pointer will be called to get sequence media data.
+ * @syscap SystemCapability.Multimedia.Media.CodecBase
+ * @param data    OH_AVBuffer buffer to fill
+ * @param length   expected to read size;
+ * @param pos    current read offset
+ * @param userData user-defined data
+ * @return  Actual size of data read to the buffer.
+ * @since 20
+ */
+typedef int32_t (*OH_AVDataSourceReadAtExt)(OH_AVBuffer *data, int32_t length, int64_t pos, void *userData);
+
+/**
+ * @brief User customized data source.
+ * @syscap SystemCapability.Multimedia.Media.CodecBase
+ * @since 20
+ */
+typedef struct OH_AVDataSourceExt {
+    /**
+     * Total size of the data source.
+     */
+    int64_t size;
+    /**
+     * Callback interface for reading data from datasource.
+     */
+    OH_AVDataSourceReadAtExt readAt;
+} OH_AVDataSourceExt;
+
 /**
  * @brief Enumerates the mime types of video avc codec.
  *
diff --git a/multimedia/av_codec/native_avsource.h b/multimedia/av_codec/native_avsource.h
index f59fe1f2f4ff76e19c4901808f01da9841e8470b..b31f6fa0ee6607607934b5c4b82504821652621d 100644
--- a/multimedia/av_codec/native_avsource.h
+++ b/multimedia/av_codec/native_avsource.h
@@ -68,6 +68,22 @@ typedef struct OH_AVSource OH_AVSource;
 */
 OH_AVSource *OH_AVSource_CreateWithDataSource(OH_AVDataSource *dataSource);
 
+/**
+ * @brief Creates an OH_AVSource instance with dataSource and userData.
+ * @syscap SystemCapability.Multimedia.Media.Spliter
+ * @param dataSource A pointer to the data source structure, which can obtain the input data.
+ * @param userData A pointer to user-defined data.
+ * @return Returns a pointer to an OH_AVSource instance if the execution is successful, otherwise returns nullptr.
+ * Possible failure causes:
+ *  1. dataSource is nullptr.
+ *  2. dataSource->size == 0.
+ *  3. set data source failed.
+ *  4. out of memory.
+ *  5. demuxer engine is nullptr.
+ * @since 20
+ */
+OH_AVSource *OH_AVSource_CreateWithDataSourceExt(OH_AVDataSourceExt *dataSource, void *userData);
+
 /**
  * @brief Creates an OH_AVSource instance that models the media at the URI.
  * @syscap SystemCapability.Multimedia.Media.Spliter