Updated docs

Signed-off-by: Nwusongqing <wusongqing@huawei.com>

en/application-dev/media/audio-playback.md

@@ -25,6 +25,9 @@ The full audio playback process includes creating an instance, setting the URI,
 For details about the **src** media source input types supported by **AudioPlayer**, see the [src attribute](../reference/apis/js-apis-media.md#audioplayer_Attributes).
 
 ```js
+import media from '@ohos.multimedia.media'
+import fileIO from '@ohos.fileio'
+
 function SetCallBack(audioPlayer) {
     audioPlayer.on('dataLoad', () => {              // Set the 'dataLoad' event callback, which is triggered when the src attribute is set successfully.
         console.info('audio set source success');
@@ -80,7 +83,18 @@ function printfDescription(obj) {
 let audioPlayer = media.createAudioPlayer();
 SetCallBack(audioPlayer);                          // Set the event callbacks.
 // 2. Set the URI of the audio file.
-audioPlayer.src = 'file:///data/data/ohos.xxx.xxx/files/test.mp3';  // Set the src attribute and trigger the 'dataLoad' event callback.
+let fdPath = 'fd://'
+let path = 'data/accounts/account_0/appdata/ohos.xxx.xxx.xxx/01.mp3';
+await fileIO.open(path).then(fdNumber) => {
+   fdPath = fdPath + '' + fdNumber;
+   console.info('open fd sucess fd is' + fdPath);
+}, (err) => {
+   console.info('open fd failed err is' + err);
+}),catch((err) => {
+   console.info('open fd failed err is' + err);
+});
+
+audioPlayer.src = fdPath;                         // Set the src attribute and trigger the 'dataLoad' event callback.
 // 3. Play the audio.
 audioPlayer.play();                               // The play() method can be invoked only after the 'dataLoad' event callback is complete. The 'play' event callback is triggered.
 // 4. Seek to the playback position.
@@ -111,6 +125,9 @@ audioPlayer = undefined;
 ### Normal Playback Scenario
 
 ```js
+import media from '@ohos.multimedia.media'
+import fileIO from '@ohos.fileio'
+
 function SetCallBack(audioPlayer) {
     audioPlayer.on('dataLoad', () => {              // Set the 'dataLoad' event callback, which is triggered when the src attribute is set successfully.
         console.info('audio set source success');
@@ -128,13 +145,27 @@ function SetCallBack(audioPlayer) {
 
 let audioPlayer = media.createAudioPlayer();       // Create an AudioPlayer instance.
 SetCallBack(audioPlayer);                          // Set the event callbacks.
-/* Set the URI of the audio file selected by the user. */
-audioPlayer.src = 'file:///data/data/ohos.xxx.xxx/files/test.mp3';  // Set the src attribute and trigger the 'dataLoad' event callback.
+/* Set the FD (local playback) of the audio file selected by the user. */
+let fdPath = 'fd://'
+let path = 'data/accounts/account_0/appdata/ohos.xxx.xxx.xxx/01.mp3';
+await fileIO.open(path).then(fdNumber) => {
+   fdPath = fdPath + '' + fdNumber;
+   console.info('open fd sucess fd is' + fdPath);
+}, (err) => {
+   console.info('open fd failed err is' + err);
+}),catch((err) => {
+   console.info('open fd failed err is' + err);
+});
+
+audioPlayer.src = fdPath;                           // Set the src attribute and trigger the 'dataLoad' event callback.
 ```
 
 ### Switching to the Next Song
 
 ```js
+import media from '@ohos.multimedia.media'
+import fileIO from '@ohos.fileio'
+
 function SetCallBack(audioPlayer) {
     audioPlayer.on('dataLoad', () => {              // Set the 'dataLoad' event callback, which is triggered when the src attribute is set successfully.
         console.info('audio set source success');
@@ -152,16 +183,42 @@ function SetCallBack(audioPlayer) {
 
 let audioPlayer = media.createAudioPlayer();       // Create an AudioPlayer instance.
 SetCallBack(audioPlayer);                          // Set the event callbacks.
-/* Set the URI of the audio file selected by the user. */
-audioPlayer.src = 'file:///data/data/ohos.xxx.xxx/files/test.mp3';  // Set the src attribute and trigger the 'dataLoad' event callback.
+/* Set the FD (local playback) of the audio file selected by the user. */
+let fdPath = 'fd://'
+let path = 'data/accounts/account_0/appdata/ohos.xxx.xxx.xxx/01.mp3';
+await fileIO.open(path).then(fdNumber) => {
+   fdPath = fdPath + '' + fdNumber;
+   console.info('open fd sucess fd is' + fdPath);
+}, (err) => {
+   console.info('open fd failed err is' + err);
+}),catch((err) => {
+   console.info('open fd failed err is' + err);
+});
+
+audioPlayer.src = fdPath;                           // Set the src attribute and trigger the 'dataLoad' event callback.
 /* Send the instruction to switch to the next song after a period of time. */
 audioPlayer.reset();
-audioPlayer.src = 'file:///data/data/ohos.xxx.xxx/files/next.mp3';
+
+/* Set the FD (local playback) of the audio file selected by the user. */
+let fdNextPath = 'fd://'
+let nextPath = 'data/accounts/account_0/appdata/ohos.xxx.xxx.xxx/01.mp3';
+await fileIO.open(nextPath).then(fdNumber) => {
+   fdNextPath = fdNextPath + '' + fdNumber;
+   console.info('open fd sucess fd is' + fdNextPath);
+}, (err) => {
+   console.info('open fd failed err is' + err);
+}),catch((err) => {
+   console.info('open fd failed err is' + err);
+});
+audioPlayer.src = fdNextPath;
 ```
 
 ### Looping a Song
 
 ```js
+import media from '@ohos.multimedia.media'
+import fileIO from '@ohos.fileio'
+
 function SetCallBack(audioPlayer) {
     audioPlayer.on('dataLoad', () => {              // Set the 'dataLoad' event callback, which is triggered when the src attribute is set successfully.
         console.info('audio set source success');
@@ -179,7 +236,19 @@ function SetCallBack(audioPlayer) {
 
 let audioPlayer = media.createAudioPlayer();       // Create an AudioPlayer instance.
 SetCallBack(audioPlayer);                          // Set the event callbacks.
-/* Set the URI of the audio file selected by the user. */
-audioPlayer.src = 'file:///data/data/ohos.xxx.xxx/files/test.mp3';  // Set the src attribute and trigger the 'dataLoad' event callback.
-audioPlayer.loop = true;                           // Set the loop playback attribute.
+
+/* Set the FD (local playback) of the audio file selected by the user. */
+let fdPath = 'fd://'
+let path = 'data/accounts/account_0/appdata/ohos.xxx.xxx.xxx/01.mp3';
+await fileIO.open(path).then(fdNumber) => {
+   fdPath = fdPath + '' + fdNumber;
+   console.info('open fd sucess fd is' + fdPath);
+}, (err) => {
+   console.info('open fd failed err is' + err);
+}),catch((err) => {
+   console.info('open fd failed err is' + err);
+});
+
+audioPlayer.src = fdPath;                           // Set the src attribute and trigger the 'dataLoad' event callback.
+audioPlayer.loop = true;                            // Set the loop playback attribute.
 ```

en/application-dev/media/audio-recorder.md

@@ -23,6 +23,11 @@ For details about the APIs used for audio recording, see [js-apis-media.md](../r
 The full audio recording process includes creating an instance, setting recording parameters, starting, pausing, resuming, and stopping recording, and releasing resources.
 
 ```js
+import media from '@ohos.multimedia.media'
+import mediaLibrary from '@ohos.multimedia.mediaLibrary'
+
+let testFdNumber;
+
 function SetCallBack(audioRecorder) {
     audioRecorder.on('prepare', () => {              								// Set the 'prepare' event callback.
         console.log('prepare success');    
@@ -57,6 +62,31 @@ function SetCallBack(audioRecorder) {
     });
 }
 
+// pathName indicates the passed recording file name, for example, 01.mp3. The generated file address is /storage/media/100/local/files/Movies/01.mp3.
+// To use the media library, declare the following permissions: ohos.permission.MEDIA_LOCATION, ohos.permission.WRITE_MEDIA, and ohos.permission.READ_MEDIA.
+async function getFd(pathName) {
+    let displayName = pathName;
+    const mediaTest = mediaLibrary.getMediaLibrary();
+    let fileKeyObj = mediaLibrary.FileKey;
+    let mediaType = mediaLibrary.MediaType.VIDEO;
+    let publicPath = await mediaTest.getPublicDirectory(mediaLibrary.DirectoryType.DIR_VIDEO);
+    let dataUri = await mediaTest.createAsset(mediaType, displayName, publicPath);
+    if (dataUri != undefined) {
+        let args = dataUri.id.toString();
+        let fetchOp = {
+            selections : fileKeyObj.ID + "=?",
+            selectionArgs : [args],
+        }
+        let fetchFileResult = await mediaTest.getFileAssets(fetchOp);
+        let fileAsset = await fetchFileResult.getAllObject();
+        let fdNumber = await fileAsset[0].open('Rw');
+        fdNumber = "fd://" + fdNumber.toString();
+        testFdNumber = fdNumber;
+    }
+}
+
+await getFd('01.mp3');
+
 // 1. Create an AudioRecorder instance.
 let audioRecorder = media.createAudioRecorder();    
 // 2. Set the callbacks.
@@ -68,7 +98,7 @@ let audioRecorderConfig = {
     audioSampleRate : 22050,
     numberOfChannels : 2,
     format : media.AudioOutputFormat.AAC_ADTS,
-    uri : 'file:///data/accounts/account_0/appdata/appdata/recorder/test.m4a',       // The file must be created by the caller and granted with proper permissions.
+    uri : testFdNumber,                             // testFdNumber is generated by getFd.
     location : { latitude : 30, longitude : 130},
 }																					
 audioRecorder.prepare(audioRecorderConfig);
@@ -92,6 +122,11 @@ audioRecorder = undefined;
 Unlike the full-process scenario, the normal recording scenario does not include the process of pausing and resuming recording.
 
 ```js
+import media from '@ohos.multimedia.media'
+import mediaLibrary from '@ohos.multimedia.mediaLibrary'
+
+let testFdNumber;
+
 function SetCallBack(audioPlayer) {
     audioRecorder.on('prepare', () => {              								// Set the 'prepare' event callback.
         console.log('prepare success');    
@@ -108,6 +143,32 @@ function SetCallBack(audioPlayer) {
         console.log('audio recorder release success');
     });    
 }
+
+// pathName indicates the passed recording file name, for example, 01.mp3. The generated file address is /storage/media/100/local/files/Movies/01.mp3.
+// To use the media library, declare the following permissions: ohos.permission.MEDIA_LOCATION, ohos.permission.WRITE_MEDIA, and ohos.permission.READ_MEDIA.
+async function getFd(pathName) {
+    let displayName = pathName;
+    const mediaTest = mediaLibrary.getMediaLibrary();
+    let fileKeyObj = mediaLibrary.FileKey;
+    let mediaType = mediaLibrary.MediaType.VIDEO;
+    let publicPath = await mediaTest.getPublicDirectory(mediaLibrary.DirectoryType.DIR_VIDEO);
+    let dataUri = await mediaTest.createAsset(mediaType, displayName, publicPath);
+    if (dataUri != undefined) {
+        let args = dataUri.id.toString();
+        let fetchOp = {
+            selections : fileKeyObj.ID + "=?",
+            selectionArgs : [args],
+        }
+        let fetchFileResult = await mediaTest.getFileAssets(fetchOp);
+        let fileAsset = await fetchFileResult.getAllObject();
+        let fdNumber = await fileAsset[0].open('Rw');
+        fdNumber = "fd://" + fdNumber.toString();
+        testFdNumber = fdNumber;
+    }
+}
+
+await getFd('01.mp3');
+
 // 1. Create an AudioRecorder instance.
 let audioRecorder = media.createAudioRecorder();   
 // 2. Set the callbacks.
@@ -119,7 +180,7 @@ let audioRecorderConfig = {
     audioSampleRate : 22050,
     numberOfChannels : 2,
     format : media.AudioOutputFormat.AAC_ADTS,
-    uri : 'file:///data/accounts/account_0/appdata/appdata/recorder/test.m4a',       // The file must be created by the caller and granted with proper permissions.
+    uri : testFdNumber,                             // testFdNumber is generated by getFd.
     location : { latitude : 30, longitude : 130},
 }
 audioRecorder.prepare(audioRecorderConfig)

en/application-dev/media/video-playback.md

@@ -28,10 +28,23 @@ For details about the APIs used for video playback, see [js-apis-media.md](../re
 
 The full video playback process includes creating an instance, setting the URL, setting the surface ID, preparing for video playback, playing video, pausing playback, obtaining track information, seeking to a playback position, setting the volume, setting the playback speed, stopping playback, resetting the playback configuration, and releasing resources.
 
+For details about the **url** media source input types supported by **VideoPlayer**, see the [url attribute](../reference/apis/js-apis-media.md#videoplayer_Attributes).
+
+For details about how to create an Xcomponent, see [Xcomponent Creation](#Xcomponent).
+
 ```js
+import media from '@ohos.multimedia.media'
+import fileIO from '@ohos.fileio'
+
 let videoPlayer = undefined; // Used to store instances created by calling the createVideoPlayer method.
 let surfaceID = undefined; // Used to save the surface ID returned by the Xcomponent interface.
 
+// The LoadXcomponent() method is used to obtain the surface ID and save it to the **surfaceID** variable. This method is automatically called when the Xcomponent is loaded.
+LoadXcomponent() {
+	surfaceID = this.$element('Xcomponent').getXComponentSurfaceId();
+    console.info('LoadXcomponent surfaceID is' + surfaceID);
+}
+
 // Report an error in the case of a function invocation failure.
 function failureCallback(error) {
     console.info(`error happened,error Name is ${error.name}`);
@@ -65,10 +78,19 @@ await media.createVideoPlayer().then((video) => {
     }
 }, failureCallback).catch(catchCallback);
 
-// Set the URL of the video file selected by the user.
-videoPlayer.url = 'file:///data/data/ohos.xxx.xxx/files/test.mp4';
+// Set the FD (local playback) of the video file selected by the user.
+let fdPath = 'fd://'
+let path = 'data/accounts/account_0/appdata/ohos.xxx.xxx.xxx/01.mp4';
+await fileIO.open(path).then(fdNumber) => {
+   fdPath = fdPath + '' + fdNumber;
+   console.info('open fd sucess fd is' + fdPath);
+}, (err) => {
+   console.info('open fd failed err is' + err);
+}),catch((err) => {
+   console.info('open fd failed err is' + err);
+});
 
-// Call the Xcomponent interface to obtain the surface ID and save it to the surfaceID variable.
+videoPlayer.url = fdPath;
 
 // Set the surface ID to display the video image.
 await videoPlayer.setDisplaySurface(surfaceID).then(() => {
@@ -145,9 +167,18 @@ surfaceID = undefined;
 ### Normal Playback Scenario
 
 ```js
+import media from '@ohos.multimedia.media'
+import fileIO from '@ohos.fileio'
+
 let videoPlayer = undefined; // Used to store instances created by calling the createVideoPlayer method.
 let surfaceID = undefined; // Used to save the surface ID returned by the Xcomponent interface.
 
+// The LoadXcomponent() method is used to obtain the surface ID and save it to the **surfaceID** variable. This method is automatically called when the Xcomponent is loaded.
+LoadXcomponent() {
+	surfaceID = this.$element('Xcomponent').getXComponentSurfaceId();
+    console.info('LoadXcomponent surfaceID is' + surfaceID);
+}
+
 // Report an error in the case of a function invocation failure.
 function failureCallback(error) {
     console.info(`error happened,error Name is ${error.name}`);
@@ -189,10 +220,19 @@ await media.createVideoPlayer().then((video) => {
 // Set the event callbacks.
 SetCallBack(videoPlayer);
 
-// Set the URL of the video file selected by the user.
-videoPlayer.url = 'file:///data/data/ohos.xxx.xxx/files/test.mp4';
+// Set the FD (local playback) of the video file selected by the user.
+let fdPath = 'fd://'
+let path = 'data/accounts/account_0/appdata/ohos.xxx.xxx.xxx/01.mp4';
+await fileIO.open(path).then(fdNumber) => {
+   fdPath = fdPath + '' + fdNumber;
+   console.info('open fd sucess fd is' + fdPath);
+}, (err) => {
+   console.info('open fd failed err is' + err);
+}),catch((err) => {
+   console.info('open fd failed err is' + err);
+});
 
-// Call the Xcomponent interface to obtain the surface ID and save it to the surfaceID variable.
+videoPlayer.url = fdPath;
 
 // Set the surface ID to display the video image.
 await videoPlayer.setDisplaySurface(surfaceID).then(() => {
@@ -213,9 +253,18 @@ await videoPlayer.play().then(() => {
 ### Switching to the Next Video Clip
 
 ```js
+import media from '@ohos.multimedia.media'
+import fileIO from '@ohos.fileio'
+
 let videoPlayer = undefined; // Used to store instances created by calling the createVideoPlayer method.
 let surfaceID = undefined; // Used to save the surface ID returned by the Xcomponent interface.
 
+// The LoadXcomponent() method is used to obtain the surface ID and save it to the **surfaceID** variable. This method is automatically called when the Xcomponent is loaded.
+LoadXcomponent() {
+	surfaceID = this.$element('Xcomponent').getXComponentSurfaceId();
+    console.info('LoadXcomponent surfaceID is' + surfaceID);
+}
+
 // Report an error in the case of a function invocation failure.
 function failureCallback(error) {
     console.info(`error happened,error Name is ${error.name}`);
@@ -257,10 +306,19 @@ await media.createVideoPlayer().then((video) => {
 // Set the event callbacks.
 SetCallBack(videoPlayer);
 
-// Set the URL of the video file selected by the user.
-videoPlayer.url = 'file:///data/data/ohos.xxx.xxx/files/test.mp4';
+// Set the FD (local playback) of the video file selected by the user.
+let fdPath = 'fd://'
+let path = 'data/accounts/account_0/appdata/ohos.xxx.xxx.xxx/01.mp4';
+await fileIO.open(path).then(fdNumber) => {
+   fdPath = fdPath + '' + fdNumber;
+   console.info('open fd sucess fd is' + fdPath);
+}, (err) => {
+   console.info('open fd failed err is' + err);
+}),catch((err) => {
+   console.info('open fd failed err is' + err);
+});
 
-// Call the Xcomponent interface to obtain the surface ID and save it to the surfaceID variable.
+videoPlayer.url = fdPath;
 
 // Set the surface ID to display the video image.
 await videoPlayer.setDisplaySurface(surfaceID).then(() => {
@@ -283,7 +341,19 @@ await videoPlayer.reset().then(() => {
     console.info('reset success');
 }, failureCallback).catch(catchCallback);
 
-videoPlayer.url = 'file:///data/data/ohos.xxx.xxx/files/next.mp4';
+// Set the FD (local playback) of the video file selected by the user.
+let fdNextPath = 'fd://'
+let nextPath = 'data/accounts/account_0/appdata/ohos.xxx.xxx.xxx/02.mp4';
+await fileIO.open(nextPath).then(fdNumber) => {
+   fdNextPath = fdNextPath + '' + fdNumber;
+   console.info('open fd sucess fd is' + fdNextPath);
+}, (err) => {
+   console.info('open fd failed err is' + err);
+}),catch((err) => {
+   console.info('open fd failed err is' + err);
+});
+
+videoPlayer.url = fdNextPath;
 
 // Set the surface ID to display the video image.
 await videoPlayer.setDisplaySurface(surfaceID).then(() => {
@@ -304,9 +374,18 @@ await videoPlayer.play().then(() => {
 ### Looping a Video Clip
 
 ```js
+import media from '@ohos.multimedia.media'
+import fileIO from '@ohos.fileio'
+
 let videoPlayer = undefined; // Used to store instances created by calling the createVideoPlayer method.
 let surfaceID = undefined; // Used to save the surface ID returned by the Xcomponent interface.
 
+// The LoadXcomponent() method is used to obtain the surface ID and save it to the **surfaceID** variable. This method is automatically called when the Xcomponent is loaded.
+LoadXcomponent() {
+	surfaceID = this.$element('Xcomponent').getXComponentSurfaceId();
+    console.info('LoadXcomponent surfaceID is' + surfaceID);
+}
+
 // Report an error in the case of a function invocation failure.
 function failureCallback(error) {
     console.info(`error happened,error Name is ${error.name}`);
@@ -348,10 +427,19 @@ await media.createVideoPlayer().then((video) => {
 // Set the event callbacks.
 SetCallBack(videoPlayer);
 
-// Set the URL of the video file selected by the user.
-videoPlayer.url = 'file:///data/data/ohos.xxx.xxx/files/test.mp4';
+// Set the FD (local playback) of the video file selected by the user.
+let fdPath = 'fd://'
+let path = 'data/accounts/account_0/appdata/ohos.xxx.xxx.xxx/01.mp4';
+await fileIO.open(path).then(fdNumber) => {
+   fdPath = fdPath + '' + fdNumber;
+   console.info('open fd sucess fd is' + fdPath);
+}, (err) => {
+   console.info('open fd failed err is' + err);
+}),catch((err) => {
+   console.info('open fd failed err is' + err);
+});
 
-// Call the Xcomponent interface to obtain the surface ID and save it to the surfaceID variable.
+videoPlayer.url = fdPath;
 
 // Set the surface ID to display the video image.
 await videoPlayer.setDisplaySurface(surfaceID).then(() => {
@@ -371,3 +459,15 @@ await videoPlayer.play().then(() => {
     console.info('play success');
 }, failureCallback).catch(catchCallback);
 ```
+
+### Xcomponent Creation
+
+```js
+The Xcomponent is used to obtain the surface ID during video playback. You need to create an xxx.hml file and add the following code to the xxx.hml file, where xxx is the same as that in the xxx.js file:
+<xcomponent id = 'Xcomponent'
+	  if = "{{isFlush}}" // Refresh the surface ID. To enable automatic loading of the Xcomponent and obtain the new surface ID, assign **false** to **isFlush** and then assign **true** to **isFlush**.
+      type = 'surface'
+	  onload = 'LoadXcomponent' // Default interface for loading the Xcomponent.
+      style = "width:720px;height:480px;border-color:red;border-width:5px;"> // Set the window width, height, and other attributes.
+</xcomponent>
+```

en/application-dev/media/video-recorder.md

@@ -23,6 +23,36 @@ For details about the APIs used for video recording, see [js-apis-media.md](../r
 The full video recording process includes creating an instance, setting recording parameters, recording video, pausing, resuming, and stopping recording, and releasing resources.
 
 ```js
+import media from '@ohos.multimedia.media'
+import mediaLibrary from '@ohos.multimedia.mediaLibrary'
+
+let testFdNumber;
+
+// pathName indicates the passed recording file name, for example, 01.mp4. The generated file address is /storage/media/100/local/files/Movies/01.mp4.
+// To use the media library, declare the following permissions: ohos.permission.MEDIA_LOCATION, ohos.permission.WRITE_MEDIA, and ohos.permission.READ_MEDIA.
+async function getFd(pathName) {
+    let displayName = pathName;
+    const mediaTest = mediaLibrary.getMediaLibrary();
+    let fileKeyObj = mediaLibrary.FileKey;
+    let mediaType = mediaLibrary.MediaType.VIDEO;
+    let publicPath = await mediaTest.getPublicDirectory(mediaLibrary.DirectoryType.DIR_VIDEO);
+    let dataUri = await mediaTest.createAsset(mediaType, displayName, publicPath);
+    if (dataUri != undefined) {
+        let args = dataUri.id.toString();
+        let fetchOp = {
+            selections : fileKeyObj.ID + "=?",
+            selectionArgs : [args],
+        }
+        let fetchFileResult = await mediaTest.getFileAssets(fetchOp);
+        let fileAsset = await fetchFileResult.getAllObject();
+        let fdNumber = await fileAsset[0].open('Rw');
+        fdNumber = "fd://" + fdNumber.toString();
+        testFdNumber = fdNumber;
+    }
+}
+
+await getFd('01.mp4');
+
 let videoProfile = {
     audioBitrate : 48000,
     audioChannels : 2,
@@ -40,7 +70,7 @@ let videoConfig = {
     audioSourceType : 1,
     videoSourceType : 0,
     profile : videoProfile,
-    url : 'file:///data/media/01.mp4',
+    url: testFdNumber, // testFdNumber is generated by getFd.
     orientationHint : 0,
     location : { latitude : 30, longitude : 130 },
 }
@@ -61,6 +91,7 @@ function catchCallback(error) {
 	
 let videoRecorder = null; // videoRecorder is an empty object and assigned with a value after createVideoRecorder is successfully called.
 let surfaceID = null; // Used to save the surface ID returned by getInputSurface.
+
 // Create a VideoRecorder object.
 await media.createVideoRecorder().then((recorder) => {
     console.info('case createVideoRecorder called');