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未验证 提交 d0caf1d8 编写于 作者: O openharmony_ci 提交者： Gitee
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!3953 翻译完成：3383 音频播放demo修改 

Merge pull request !3953 from wusongqing/TR3383
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en/application-dev/media/audio-playback.md
浏览文件 @ d0caf1d8
......@@ -22,32 +22,43 @@ For details about the APIs, see [AudioPlayer in the Media API](../reference/apis
The full audio playback process includes creating an instance, setting the URI, playing audio, seeking to the playback position, setting the volume, pausing playback, obtaining track information, stopping playback, resetting the player, and releasing resources.
For details about the **src** media source input types supported by **AudioPlayer**, see the [src attribute](../reference/apis/js-apis-media.md#audioplayer_attributes).
For details about the **src** 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) {
// Print the stream track information.
function printfDescription(obj) {
for (let item in obj) {
let property = obj[item];
console.info('audio key is ' + item);
console.info('audio value is ' + property);
}
}
// Set the player callbacks.
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');
// The playback page is ready. You can click the Play button to start the playback.
audioPlayer.play(); // The play() API can be invoked only after the 'dataLoad' event callback is complete. The 'play' event callback is then triggered.
});
audioPlayer.on('play', () => { // Set the 'play' event callback.
console.info('audio play success');
// The Play button is changed to the pausable state.
audioPlayer.pause(); // Trigger the 'pause' event callback and pause the playback.
});
audioPlayer.on('pause', () => { // Set the 'pause' event callback.
console.info('audio pause success');
// The Play button is changed to the playable state.
audioPlayer.seek(5000); // Trigger the 'timeUpdate' event callback, and seek to 5000 ms for playback.
});
audioPlayer.on('stop', () => { // Set the 'stop' event callback.
console.info('audio stop success');
// The playback stops, the playback progress bar returns to 0, and the Play button is changed to the playable state.
audioPlayer.reset(); // Trigger the 'reset' event callback, and reconfigure the src attribute to switch to the next song.
});
audioPlayer.on('reset', () => { // Set the 'reset' event callback.
console.info('audio reset success');
// You can reconfigure the src attribute to play another audio file.
audioPlayer.release(); // Release the AudioPlayer resources.
audioPlayer = undefined;
});
audioPlayer.on('timeUpdate', (seekDoneTime) => {// Set the 'timeUpdate' event callback.
if (typeof(seekDoneTime) == 'undefined') {
......@@ -55,11 +66,20 @@ function SetCallBack(audioPlayer) {
return;
}
console.info('audio seek success, and seek time is ' + seekDoneTime);
// The playback progress bar is updated to the seek position.
audioPlayer.setVolume(0.5); // Trigger the 'volumeChange' event callback.
});
audioPlayer.on('volumeChange', () => { // Set the 'volumeChange' event callback.
console.info('audio volumeChange success');
// Display the updated volume.
audioPlayer.getTrackDescription((error, arrlist) => { // Obtain the audio track information in callback mode.
if (typeof (arrlist) != 'undefined') {
for (let i = 0; i < arrlist.length; i++) {
printfDescription(arrlist[i]);
}
} else {
console.log(`audio getTrackDescription fail, error:${error.message}`);
}
audioPlayer.stop(); // Trigger the 'stop' event callback to stop the playback.
});
});
audioPlayer.on('finish', () => { // Set the 'finish' event callback, which is triggered when the playback is complete.
console.info('audio play finish');
......@@ -71,56 +91,24 @@ function SetCallBack(audioPlayer) {
});
}
function printfDescription(obj) {
for (let item in obj) {
let property = obj[item];
console.info('audio key is ' + item);
console.info('audio value is ' + property);
}
}
// 1. Create an audioPlayer instance.
let audioPlayer = media.createAudioPlayer();
SetCallBack(audioPlayer); // Set the event callbacks.
// 2. Set the URI of the audio file selected by the user.
let fdPath = 'fd://'
// The stream in the path can be pushed to the device by running the "hdc file send D:\xxx\01.mp3 /data/accounts/account_0/appdata" command.
let path = '/data/accounts/account_0/appdata/ohos.xxx.xxx.xxx/01.mp3';
await fileIO.open(path).then(fdNumber) => {
async function audioPlayerDemo() {
// 1. Create an audioPlayer instance.
let audioPlayer = media.createAudioPlayer();
setCallBack(audioPlayer); // Set the event callbacks.
// 2. Set the URI of the audio file selected by the user.
let fdPath = 'fd://'
// The stream in the path can be pushed to the device by running the "hdc file send D:\xxx\01.mp3 /data/app/el1/bundle/public/ohos.acts.multimedia.audio.audioplayer/ohos.acts.multimedia.audio.audioplayer/assets/entry/resources/rawfile" command.
let path = '/data/app/el1/bundle/public/ohos.acts.multimedia.audio.audioplayer/ohos.acts.multimedia.audio.audioplayer/assets/entry/resources/rawfile/01.mp3';
await fileIO.open(path).then((fdNumber) => {
fdPath = fdPath + '' + fdNumber;
console.info('open fd sucess fd is' + fdPath);
}, (err) => {
}, (err) => {
console.info('open fd failed err is' + err);
}),catch((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 file.
audioPlayer.play(); // The play() API can be invoked only after the 'dataLoad' event callback is complete. The 'play' event callback is triggered.
// 4. Seek to the playback position.
audioPlayer.seek(30000); // Trigger the 'timeUpdate' event callback, and seek to 30000 ms for playback.
// 5. Set the volume.
audioPlayer.setVolume(0.5); // Trigger the 'volumeChange' event callback.
// 6. Pause the playback.
audioPlayer.pause(); // Trigger the 'pause' event callback and pause the playback.
// 7. Obtain the track information.
audioPlayer.getTrackDescription((error, arrlist) => { // Obtain the audio track information in callback mode.
if (typeof (arrlist) != 'undefined') {
for (let i = 0; i < arrlist.length; i++) {
printfDescription(arrlist[i]);
}
} else {
console.log(`audio getTrackDescription fail, error:${error.message}`);
}
});
// 8. Stop the playback.
audioPlayer.stop(); // Trigger the 'stop' event callback.
// 9. Reset the player.
audioPlayer.reset(); // Trigger the 'reset' event callback, and reconfigure the src attribute to switch to the next song.
// 10. Release the resource.
audioPlayer.release(); // Release the AudioPlayer instance.
audioPlayer = undefined;
});
audioPlayer.src = fdPath; // Set the src attribute and trigger the 'dataLoad' event callback.
}
```
### Normal Playback Scenario
......@@ -128,8 +116,9 @@ audioPlayer = undefined;
```js
import media from '@ohos.multimedia.media'
import fileIO from '@ohos.fileio'
function SetCallBack(audioPlayer) {
export class AudioDemo {
// Set the player callbacks.
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');
audioPlayer.play(); // Call the play() API to start the playback and trigger the 'play' event callback.
......@@ -139,27 +128,28 @@ function SetCallBack(audioPlayer) {
});
audioPlayer.on('finish', () => { // Set the 'finish' event callback, which is triggered when the playback is complete.
console.info('audio play finish');
audioPlayer.release(); // Release the AudioPlayer instance.
audioPlayer.release(); // Release the AudioPlayer resources.
audioPlayer = undefined;
});
}
}
let audioPlayer = media.createAudioPlayer(); // Create an AudioPlayer instance.
SetCallBack(audioPlayer); // Set the event callbacks.
/* Set the FD (local playback) of the audio file selected by the user. */
let fdPath = 'fd://'
// The stream in the path can be pushed to the device by running the "hdc file send D:\xxx\01.mp3 /data/accounts/account_0/appdata" command.
let path = '/data/accounts/account_0/appdata/ohos.xxx.xxx.xxx/01.mp3';
await fileIO.open(path).then(fdNumber) => {
async audioPlayerDemo() {
let audioPlayer = media.createAudioPlayer(); // Create an AudioPlayer instance.
this.setCallBack(audioPlayer); // Set the event callbacks.
let fdPath = 'fd://'
// The stream in the path can be pushed to the device by running the "hdc file send D:\xxx\01.mp3 /data/app/el1/bundle/public/ohos.acts.multimedia.audio.audioplayer/ohos.acts.multimedia.audio.audioplayer/assets/entry/resources/rawfile" command.
let path = '/data/app/el1/bundle/public/ohos.acts.multimedia.audio.audioplayer/ohos.acts.multimedia.audio.audioplayer/assets/entry/resources/rawfile/01.mp3';
await fileIO.open(path).then((fdNumber) => {
fdPath = fdPath + '' + fdNumber;
console.info('open fd sucess fd is' + fdPath);
}, (err) => {
}, (err) => {
console.info('open fd failed err is' + err);
}),catch((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.src = fdPath; // Set the src attribute and trigger the 'dataLoad' event callback.
}
}
```
### Switching to the Next Song
......@@ -167,54 +157,62 @@ audioPlayer.src = fdPath; // Set the src attribute and
```js
import media from '@ohos.multimedia.media'
import fileIO from '@ohos.fileio'
function SetCallBack(audioPlayer) {
export class AudioDemo {
// Set the player callbacks.
private isNextMusic = false;
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');
audioPlayer.play(); // Call the play() API to start the playback and trigger the 'play' event callback.
});
audioPlayer.on('play', () => { // Set the 'play' event callback.
console.info('audio play success');
audioPlayer.reset(); // Call the reset() API and trigger the 'reset' event callback.
});
audioPlayer.on('finish', () => { // Set the 'finish' event callback, which is triggered when the playback is complete.
console.info('audio play finish');
audioPlayer.on('reset', () => { // Set the 'reset' event callback.
console.info('audio play success');
if (!this.isNextMusic) { // When isNextMusic is false, changing songs is implemented.
this.nextMusic(audioPlayer); // Changing songs is implemented.
} else {
audioPlayer.release(); // Release the AudioPlayer instance.
audioPlayer = undefined;
}
});
}
}
let audioPlayer = media.createAudioPlayer(); // Create an AudioPlayer instance.
SetCallBack(audioPlayer); // Set the event callbacks.
/* Set the FD (local playback) of the audio file selected by the user. */
let fdPath = 'fd://'
// The stream in the path can be pushed to the device by running the "hdc file send D:\xxx\01.mp3 /data/accounts/account_0/appdata" command.
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) => {
async nextMusic(audioPlayer) {
this.isNextMusic = true;
let nextFdPath = 'fd://'
// The stream in the path can be pushed to the device by running the "hdc file send D:\xxx\02.mp3 /data/app/el1/bundle/public/ohos.acts.multimedia.audio.audioplayer/ohos.acts.multimedia.audio.audioplayer/assets/entry/resources/rawfile" command.
let nextpath = '/data/app/el1/bundle/public/ohos.acts.multimedia.audio.audioplayer/ohos.acts.multimedia.audio.audioplayer/assets/entry/resources/rawfile/02.mp3';
await fileIO.open(nextpath).then((fdNumber) => {
nextFdPath = nextFdPath + '' + fdNumber;
console.info('open fd sucess fd is' + nextFdPath);
}, (err) => {
console.info('open fd failed err is' + err);
}),catch((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 = nextFdPath; // Set the src attribute and trigger the 'dataLoad' event callback.
}
/* Set the FD (local playback) of the audio file selected by the user. */
let fdNextPath = 'fd://'
// The stream in the path can be pushed to the device by running the "hdc file send D:\xxx\02.mp3 /data/accounts/account_0/appdata" command.
let nextPath = '/data/accounts/account_0/appdata/ohos.xxx.xxx.xxx/02.mp3';
await fileIO.open(nextPath).then(fdNumber) => {
fdNextPath = fdNextPath + '' + fdNumber;
console.info('open fd sucess fd is' + fdNextPath);
}, (err) => {
async audioPlayerDemo() {
let audioPlayer = media.createAudioPlayer(); // Create an AudioPlayer instance.
this.setCallBack(audioPlayer); // Set the event callbacks.
let fdPath = 'fd://'
// The stream in the path can be pushed to the device by running the "hdc file send D:\xxx\01.mp3 /data/app/el1/bundle/public/ohos.acts.multimedia.audio.audioplayer/ohos.acts.multimedia.audio.audioplayer/assets/entry/resources/rawfile" command.
let path = '/data/app/el1/bundle/public/ohos.acts.multimedia.audio.audioplayer/ohos.acts.multimedia.audio.audioplayer/assets/entry/resources/rawfile/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) => {
}).catch((err) => {
console.info('open fd failed err is' + err);
});
audioPlayer.src = fdNextPath;
});
audioPlayer.src = fdPath; // Set the src attribute and trigger the 'dataLoad' event callback.
}
}
```
### Looping a Song
......@@ -222,40 +220,36 @@ audioPlayer.src = fdNextPath;
```js
import media from '@ohos.multimedia.media'
import fileIO from '@ohos.fileio'
function SetCallBack(audioPlayer) {
export class AudioDemo {
// Set the player callbacks.
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');
audioPlayer.loop = true; // Set the loop playback attribute.
audioPlayer.play(); // Call the play() API to start the playback and trigger the 'play' event callback.
});
audioPlayer.on('play', () => { // Set the 'play' event callback.
audioPlayer.on('play', () => { // Sets the 'play' event callback to start loop playback.
console.info('audio play success');
});
audioPlayer.on('finish', () => { // Set the 'finish' event callback, which is triggered when the playback is complete.
console.info('audio play finish');
audioPlayer.release(); // Release the AudioPlayer instance.
audioPlayer = undefined;
});
}
let audioPlayer = media.createAudioPlayer(); // Create an AudioPlayer instance.
SetCallBack(audioPlayer); // Set the event callbacks.
}
/* Set the FD (local playback) of the audio file selected by the user. */
let fdPath = 'fd://'
// The stream in the path can be pushed to the device by running the "hdc file send D:\xxx\01.mp3 /data/accounts/account_0/appdata" command.
let path = 'data/accounts/account_0/appdata/ohos.xxx.xxx.xxx/01.mp3';
await fileIO.open(path).then(fdNumber) => {
async audioPlayerDemo() {
let audioPlayer = media.createAudioPlayer(); // Create an AudioPlayer instance.
this.setCallBack(audioPlayer); // Set the event callbacks.
let fdPath = 'fd://'
// The stream in the path can be pushed to the device by running the "hdc file send D:\xxx\01.mp3 /data/app/el1/bundle/public/ohos.acts.multimedia.audio.audioplayer/ohos.acts.multimedia.audio.audioplayer/assets/entry/resources/rawfile" command.
let path = '/data/app/el1/bundle/public/ohos.acts.multimedia.audio.audioplayer/ohos.acts.multimedia.audio.audioplayer/assets/entry/resources/rawfile/01.mp3';
await fileIO.open(path).then((fdNumber) => {
fdPath = fdPath + '' + fdNumber;
console.info('open fd sucess fd is' + fdPath);
}, (err) => {
}, (err) => {
console.info('open fd failed err is' + err);
}),catch((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.
});
audioPlayer.src = fdPath; // Set the src attribute and trigger the 'dataLoad' event callback.
}
}
```
## Samples
......@@ -263,7 +257,6 @@ audioPlayer.loop = true; // Set the loop playback att
The following samples are provided to help you better understand how to develop audio playback:
- [`JsDistributedMusicPlayer`: Distributed Music Player (JS) (API7)](https://gitee.com/openharmony/app_samples/tree/master/ability/JsDistributedMusicPlayer)
- [`JsAudioPlayer`: Audio Playback and Management (JS) (API7)](https://gitee.com/openharmony/app_samples/tree/master/media/JsAudioPlayer)
- [`JsAudioPlayer`: Audio Playback and Management (JS, API 7)](https://gitee.com/openharmony/app_samples/tree/master/media/JsAudioPlayer)
- [`eTsAudioPlayer`: Audio Player (eTS)](https://gitee.com/openharmony/app_samples/blob/master/media/Recorder/entry/src/main/ets/MainAbility/pages/Play.ets)
- [Audio Player](https://gitee.com/openharmony/codelabs/tree/master/Media/Audio_OH_ETS)
en/application-dev/media/audio-recorder.md
浏览文件 @ d0caf1d8
......@@ -25,46 +25,49 @@ The full audio recording process includes creating an instance, setting recordin
```js
import media from '@ohos.multimedia.media'
import mediaLibrary from '@ohos.multimedia.mediaLibrary'
export class AudioRecorderDemo {
private testFdNumber; // Used to save the FD address.
let testFdNumber;
function SetCallBack(audioRecorder) {
// Set the callbacks related to audio recording.
setCallBack(audioRecorder) {
audioRecorder.on('prepare', () => { // Set the 'prepare' event callback.
console.log('prepare success');
// The recording page is ready. You can click the Record button to start recording.
audioRecorder.start(); // Call the start API to start recording and trigger the 'start' event callback.
});
audioRecorder.on('start', () => { // Set the 'start' event callback.
console.log('audio recorder start success');
// The Record button is changed to the pausable state.
audioRecorder.pause(); // Call the pause API to pause recording and trigger the 'pause' event callback.
});
audioRecorder.on('pause', () => { // Set the 'pause' event callback.
console.log('audio recorder pause success');
// The Record button is changed to the recordable state.
audioRecorder.resume(); // Call the resume API to resume recording and trigger the 'resume' event callback.
});
audioRecorder.on('resume', () => { // Set the 'resume' event callback.
console.log('audio recorder resume success');
// The Record button is changed to the pausable state.
audioRecorder.stop(); // Call the stop API to stop recording and trigger the 'stop' event callback.
});
audioRecorder.on('stop', () => { // Set the 'stop' event callback.
console.log('audio recorder stop success');
});
audioRecorder.on('release', () => { // Set the 'release' event callback.
console.log('audio recorder release success');
audioRecorder.reset(); // Call the reset API to reset the recorder and trigger the 'reset' event callback.
});
audioRecorder.on('reset', () => { // Set the 'reset' event callback.
console.log('audio recorder reset success');
// You need to reset the recording parameters for another recording.
audioRecorder.release(); // Call the release API to release resources and trigger the 'release' event callback.
});
audioRecorder.on('release', () => { // Set the 'release' event callback.
console.log('audio recorder release success');
audioRecorder = undefined;
});
audioRecorder.on('error', (error) => { // Set the 'error' event callback.
console.info(`audio error called, errName is ${error.name}`);
console.info(`audio error called, errCode is ${error.code}`);
console.info(`audio error called, errMessage is ${error.message}`);
});
}
}
// 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) {
// pathName indicates the passed recording file name, for example, 01.mp3. The generated file address is /storage/media/100/local/files/Video/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 getFd(pathName) {
let displayName = pathName;
const mediaTest = mediaLibrary.getMediaLibrary();
let fileKeyObj = mediaLibrary.FileKey;
......@@ -80,41 +83,29 @@ async function getFd(pathName) {
let fetchFileResult = await mediaTest.getFileAssets(fetchOp);
let fileAsset = await fetchFileResult.getAllObject();
let fdNumber = await fileAsset[0].open('Rw');
fdNumber = "fd://" + fdNumber.toString();
testFdNumber = fdNumber;
this.testFdNumber = "fd://" + fdNumber.toString();
}
}
}
await getFd('01.mp3');
// 1. Create an AudioRecorder instance.
let audioRecorder = media.createAudioRecorder();
// 2. Set the callbacks.
SetCallBack(audioRecorder);
// 3. Set the recording parameters.
let audioRecorderConfig = {
audioEncoder : media.AudioEncoder.AAC_LC ,
async audioRecorderDemo() {
// 1. Create an AudioRecorder instance.
let audioRecorder = media.createAudioRecorder();
// 2. Set the callbacks.
this.setCallBack(audioRecorder);
await this.getFd('01.mp3'); // Call the getFd method to obtain the FD address of the file to be recorded.
// 3. Set the recording parameters.
let audioRecorderConfig = {
audioEncodeBitRate : 22050,
audioSampleRate : 22050,
numberOfChannels : 2,
format : media.AudioOutputFormat.AAC_ADTS,
uri : testFdNumber, // testFdNumber is generated by getFd.
uri : this.testFdNumber, // testFdNumber is generated by getFd.
location : { latitude : 30, longitude : 130},
audioEncoderMime : media.CodecMimeType.AUDIO_AAC,
fileFormat : media.ContainerFormatType.CFT_MPEG_4A,
}
audioRecorder.prepare(audioRecorderConfig); // Call the prepare method to trigger the 'prepare' event callback.
}
}
audioRecorder.prepare(audioRecorderConfig);
// 4. Start recording.
audioRecorder.start(); // The start API can be called to trigger the 'start' event callback only after the 'prepare' event callback is complete.
// 5. Pause recording.
audioRecorder.pause(); // The pause API can be called to trigger the 'pause' event callback only after the 'start' event callback is complete.
// 6. Resume recording.
audioRecorder.resume(); // The resume API can be called to trigger the 'resume' event callback only after the 'pause' event callback is complete.
// 7. Stop recording.
audioRecorder.stop(); // The stop API can be called to trigger the 'stop' event callback only after the 'start' or 'resume' event callback is complete.
// 8. Reset recording.
audioRecorder.reset(); // The prepare API can be called for another recording only after the 'reset' event callback is complete.
// 9. Release resources.
audioRecorder.release(); // The AudioRecorder resource is destroyed.
audioRecorder = undefined;
```
### Normal Recording Scenario
......@@ -124,29 +115,37 @@ Unlike the full-process scenario, the normal recording scenario does not include
```js
import media from '@ohos.multimedia.media'
import mediaLibrary from '@ohos.multimedia.mediaLibrary'
export class AudioRecorderDemo {
private testFdNumber; // Used to save the FD address.
let testFdNumber;
function SetCallBack(audioRecorder) {
// Set the callbacks related to audio recording.
setCallBack(audioRecorder) {
audioRecorder.on('prepare', () => { // Set the 'prepare' event callback.
console.log('prepare success');
// The recording page is ready. You can click the Record button to start recording.
audioRecorder.start(); // Call the start API to start recording and trigger the 'start' event callback.
});
audioRecorder.on('start', () => { // Set the 'start' event callback.
console.log('audio recorder start success');
// The Record button is changed to the pausable state.
audioRecorder.stop(); // Call the stop API to stop recording and trigger the 'stop' event callback.
});
audioRecorder.on('stop', () => { // Set the 'stop' event callback.
console.log('audio recorder stop success');
audioRecorder.release(); // Call the release API to release resources and trigger the 'release' event callback.
});
audioRecorder.on('release', () => { // Set the 'release' event callback.
console.log('audio recorder release success');
audioRecorder = undefined;
});
}
audioRecorder.on('error', (error) => { // Set the 'error' event callback.
console.info(`audio error called, errName is ${error.name}`);
console.info(`audio error called, errCode is ${error.code}`);
console.info(`audio error called, errMessage is ${error.message}`);
});
}
// 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) {
// pathName indicates the passed recording file name, for example, 01.mp3. The generated file address is /storage/media/100/local/files/Video/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 getFd(pathName) {
let displayName = pathName;
const mediaTest = mediaLibrary.getMediaLibrary();
let fileKeyObj = mediaLibrary.FileKey;
......@@ -162,33 +161,35 @@ async function getFd(pathName) {
let fetchFileResult = await mediaTest.getFileAssets(fetchOp);
let fileAsset = await fetchFileResult.getAllObject();
let fdNumber = await fileAsset[0].open('Rw');
fdNumber = "fd://" + fdNumber.toString();
testFdNumber = fdNumber;
this.testFdNumber = "fd://" + fdNumber.toString();
}
}
}
await getFd('01.mp3');
// 1. Create an AudioRecorder instance.
let audioRecorder = media.createAudioRecorder();
// 2. Set the callbacks.
SetCallBack(audioRecorder);
// 3. Set the recording parameters.
let audioRecorderConfig = {
audioEncoder : media.AudioEncoder.AAC_LC ,
async audioRecorderDemo() {
// 1. Create an AudioRecorder instance.
let audioRecorder = media.createAudioRecorder();
// 2. Set the callbacks.
this.setCallBack(audioRecorder);
await this.getFd('01.mp3'); // Call the getFd method to obtain the FD address of the file to be recorded.
// 3. Set the recording parameters.
let audioRecorderConfig = {
audioEncodeBitRate : 22050,
audioSampleRate : 22050,
numberOfChannels : 2,
format : media.AudioOutputFormat.AAC_ADTS,
uri : testFdNumber, // testFdNumber is generated by getFd.
uri : this.testFdNumber, // testFdNumber is generated by getFd.
location : { latitude : 30, longitude : 130},
audioEncoderMime : media.CodecMimeType.AUDIO_AAC,
fileFormat : media.ContainerFormatType.CFT_MPEG_4A,
}
audioRecorder.prepare(audioRecorderConfig); // Call the prepare method to trigger the 'prepare' event callback.
}
}
audioRecorder.prepare(audioRecorderConfig)
// 4. Start recording.
audioRecorder.start(); // The start API can be called to trigger the 'start' event callback only after the 'prepare' event callback is complete.
// 5. Stop recording.
audioRecorder.stop(); // The stop API can be called to trigger the 'stop' event callback only after the 'start' or 'resume' event callback is complete.
// 6. Release resources.
audioRecorder.release(); // The AudioRecorder resource is destroyed.
audioRecorder = undefined;
```
## Samples
The following samples are provided to help you better understand how to develop audio recording:
- [`Recorder`: Recorder (eTS, API 8)](https://gitee.com/openharmony/app_samples/tree/master/media/Recorder)
- [`eTsAudioPlayer`: Audio Player (eTS)](https://gitee.com/openharmony/app_samples/blob/master/media/Recorder/entry/src/main/ets/MainAbility/pages/Play.ets)
- [Audio Player](https://gitee.com/openharmony/codelabs/tree/master/Media/Audio_OH_ETS)
en/application-dev/media/video-recorder.md
浏览文件 @ d0caf1d8
......@@ -16,21 +16,20 @@ During video recording, audio and video signals are captured, encoded, and saved
## How to Develop
For details about the APIs used for video recording, see [VideoRecorder in the Media API](../reference/apis/js-apis-media.md).
For details about the APIs, see [VideoRecorder in the Media API](../reference/apis/js-apis-media.md).
### Full-Process Scenario
The full video recording process includes creating an instance, setting recording parameters, recording video, pausing, resuming, and stopping recording, and releasing resources.
The full video 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;
// 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) {
export class VideoRecorderDemo {
private testFdNumber; // Used to save the FD address.
// pathName indicates the passed recording file name, for example, 01.mp4. The generated file address is /storage/media/100/local/files/Video/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 getFd(pathName) {
let displayName = pathName;
const mediaTest = mediaLibrary.getMediaLibrary();
let fileKeyObj = mediaLibrary.FileKey;
......@@ -46,14 +45,31 @@ async function getFd(pathName) {
let fetchFileResult = await mediaTest.getFileAssets(fetchOp);
let fileAsset = await fetchFileResult.getAllObject();
let fdNumber = await fileAsset[0].open('Rw');
fdNumber = "fd://" + fdNumber.toString();
testFdNumber = fdNumber;
this.testFdNumber = "fd://" + fdNumber.toString();
}
}
}
await getFd('01.mp4');
// Error callback triggered in the case of an error
failureCallback(error) {
console.info('error happened, error name is ' + error.name);
console.info('error happened, error code is ' + error.code);
console.info('error happened, error message is ' + error.message);
}
let videoProfile = {
// Error callback triggered in the case of an exception
catchCallback(error) {
console.info('catch error happened, error name is ' + error.name);
console.info('catch error happened, error code is ' + error.code);
console.info('catch error happened, error message is ' + error.message);
}
async videoRecorderDemo() {
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.
// Obtain the FD address of the video to be recorded.
await this.getFd('01.mp4');
// Recording-related parameter settings
let videoProfile = {
audioBitrate : 48000,
audioChannels : 2,
audioCodec : 'audio/mp4a-latm',
......@@ -64,36 +80,18 @@ let videoProfile = {
videoFrameWidth : 640,
videoFrameHeight : 480,
videoFrameRate : 30
}
}
let videoConfig = {
let videoConfig = {
audioSourceType : 1,
videoSourceType : 0,
profile : videoProfile,
url: testFdNumber, // testFdNumber is generated by getFd.
url : this.testFdNumber, // testFdNumber is generated by getFd.
orientationHint : 0,
location : { latitude : 30, longitude : 130 },
}
// Error callback triggered in the case of an error
function failureCallback(error) {
console.info('error happened, error name is ' + error.name);
console.info('error happened, error code is ' + error.code);
console.info('error happened, error message is ' + error.message);
}
// Error callback triggered in the case of an exception
function catchCallback(error) {
console.info('catch error happened, error name is ' + error.name);
console.info('catch error happened, error code is ' + error.code);
console.info('catch error happened, error message is ' + error.message);
}
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) => {
}
// Create a VideoRecorder object.
await media.createVideoRecorder().then((recorder) => {
console.info('case createVideoRecorder called');
if (typeof (recorder) != 'undefined') {
videoRecorder = recorder;
......@@ -101,47 +99,53 @@ await media.createVideoRecorder().then((recorder) => {
} else {
console.info('createVideoRecorder failed');
}
}, failureCallback).catch(catchCallback);
}, this.failureCallback).catch(this.catchCallback);
// Obtain the surface ID, save it, and pass it to camera-related interfaces.
await videoRecorder.getInputSurface().then((surface) => {
// Call the prepare API to prepare for video recording.
await videoRecorder.prepare(videoConfig).then(() => {
console.info('prepare success');
}, this.failureCallback).catch(this.catchCallback);
// Obtain the surface ID, save it, and pass it to camera-related APIs.
await videoRecorder.getInputSurface().then((surface) => {
console.info('getInputSurface success');
surfaceID = surface;
}, failureCallback).catch(catchCallback);
// Video recording depends on camera-related interfaces. The following operations can be performed only after the video output start interface is invoked.
}, this.failureCallback).catch(this.catchCallback);
// Start video recording.
await videoRecorder.start().then(() => {
// Video recording depends on camera-related APIs. The following operations can be performed only after the video output start API is invoked. For details about how to call the camera APIs, see the samples.
// Start video recording.
await videoRecorder.start().then(() => {
console.info('start success');
}, failureCallback).catch(catchCallback);
}, this.failureCallback).catch(this.catchCallback);
// Pause video playback before the video output stop interface is invoked.
await videoRecorder.pause().then(() => {
// Pause video recording before the video output stop API of the camera is invoked.
await videoRecorder.pause().then(() => {
console.info('pause success');
}, failureCallback).catch(catchCallback);
}, this.failureCallback).catch(this.catchCallback);
// Resume video playback after the video output start interface is invoked.
await videoRecorder.resume().then(() => {
// Resume video recording after the video output start API of the camera is invoked.
await videoRecorder.resume().then(() => {
console.info('resume success');
}, failureCallback).catch(catchCallback);
}, this.failureCallback).catch(this.catchCallback);
// Stop video recording after the video output stop interface is invoked.
await videoRecorder.stop().then(() => {
// Stop video recording after the video output stop API of the camera is invoked.
await videoRecorder.stop().then(() => {
console.info('stop success');
}, failureCallback).catch(catchCallback);
}, this.failureCallback).catch(this.catchCallback);
// Reset the recording configuration.
await videoRecorder.reset().then(() => {
// Reset the recording configuration.
await videoRecorder.reset().then(() => {
console.info('reset success');
}, failureCallback).catch(catchCallback);
}, this.failureCallback).catch(this.catchCallback);
// Release the video recording resources and camera object resources.
await videoRecorder.release().then(() => {
// Release the video recording resources and camera object resources.
await videoRecorder.release().then(() => {
console.info('release success');
}, failureCallback).catch(catchCallback);
}, this.failureCallback).catch(this.catchCallback);
// Set the related object to null.
videoRecorder = null;
surfaceID = null;
// Set the related object to null.
videoRecorder = undefined;
surfaceID = undefined;
}
}
```
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