From 6661d6b389ab9022f9e6d145edf2b0a1c94cd6c8 Mon Sep 17 00:00:00 2001
From: liujia178 <liujia178@huawei.com>
Date: Thu, 15 May 2025 21:00:02 +0800
Subject: [PATCH] =?UTF-8?q?=E4=BF=AE=E6=94=B9media.MediaDescription=20arkt?=
 =?UTF-8?q?s1.2=20=E5=B7=AE=E5=BC=82?=
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Signed-off-by: liujia178 <liujia178@huawei.com>
---
 .../reference/apis-media-kit/js-apis-media.md | 39 +++++++++++++++++++
 1 file changed, 39 insertions(+)

diff --git a/zh-cn/application-dev/reference/apis-media-kit/js-apis-media.md b/zh-cn/application-dev/reference/apis-media-kit/js-apis-media.md
index d9d40ef0ec9..dea8a580e21 100644
--- a/zh-cn/application-dev/reference/apis-media-kit/js-apis-media.md
+++ b/zh-cn/application-dev/reference/apis-media-kit/js-apis-media.md
@@ -3184,12 +3184,20 @@ SEI信息内容，描述SEI信息的负载类型和数据。
 
 **系统能力：** SystemCapability.Multimedia.Media.Core
 
+ArkTS1.1: 
 | 名称          | 类型   | 必填 | 说明                                                         |
 | ------------- | ------ | ---- | ------------------------------------------------------------ |
 | [key: string] | Object | 是   | 该键值对支持的key取值范围，请参考[MediaDescriptionKey](#mediadescriptionkey8);每个key值的Object类型和范围，请参考[MediaDescriptionKey](#mediadescriptionkey8)对应Key值的说明 |
 
+ArkTS1.2: 
+| 名称          | 类型   | 必填 | 说明                                                         |
+| ------------- | ------ | ---- | ------------------------------------------------------------ |
+| Record<string, Object> | Object | 是   | 该键值对支持的key取值范围，请参考[MediaDescriptionKey](#mediadescriptionkey8);每个key值的Object类型和范围，请参考[MediaDescriptionKey](#mediadescriptionkey8)对应Key值的说明 |
+
 **示例：**
 
+ArkTS1.1示例：
+
 ```ts
 import { BusinessError } from '@kit.BasicServicesKit';
 
@@ -3219,6 +3227,37 @@ media.createAVPlayer((err: BusinessError, player: media.AVPlayer) => {
 });
 ```
 
+ArkTS1.2示例：
+
+```ts
+import { BusinessError } from '@ohos.base';
+
+function printfItemDescription(obj: media.MediaDescription, key: string) {
+    let property: Object | undefined = obj[key];
+    console.info('audio key is ' + key); // 通过key值获取对应的value。key值具体可见[MediaDescriptionKey]。
+    console.info('audio value is ' + property); //对应key值得value。其类型可为任意类型，具体key对应value的类型可参考[MediaDescriptionKey]。
+}
+
+let avPlayer: media.AVPlayer | undefined = undefined;
+media.createAVPlayer((err: BusinessError, player: media.AVPlayer) => {
+  if(player != null) {
+    avPlayer = player;
+    console.info(`Succeeded in creating AVPlayer`);
+    avPlayer!!.getTrackDescription((error: BusinessError, arrList: Array<media.MediaDescription>) => {
+      if (arrList != null) {
+        for (let i = 0; i < arrList.length; i++) {
+          printfItemDescription(arrList[i], media.MediaDescriptionKey.MD_KEY_TRACK_TYPE);  //打印出每条轨道MD_KEY_TRACK_TYPE的值。
+        }
+      } else {
+        console.error(`Failed to get TrackDescription, error:${error}`);
+      }
+    });
+  } else {
+    console.error(`Failed to create AVPlayer, error message:${err.message}`);
+  }
+});
+```
+
 ## PlaybackInfo<sup>12+</sup>
 
 通过key-value方式获取播放信息。
-- 
Gitee