我还在持续做微信JSSDK录音方面的开发, 欢迎大家使用audio.js并提出宝贵意见, 我会尽快给大家反馈!
个人觉得recorder.js还不是很好用. 如果有人发现了比recorder.js更好用的HTML5录音js, 欢迎推荐.
我整理了一篇文档, 微信JSSDK与录音相关的坑. 欢迎来看看
微信JSSDK为前端提供了一些与NativeApp交互的接口, 如通过图像接口可以拍照或访问手机相册, 通过音频接口可以录音.
我在做关于音频接口的开发过程中遇到了几个问题:
- 如何结合Desktop测试和微信客户端测试? 即大多数开发的时候在Desktop上通过Chrome录音, 而通过微信客户端访问WebApp时就调用微信JSSDK录音.
- 微信JSSDK的录音模块有BUG.
- 微信JSSDK提供的处理方式都是都是通过回调函数实现的, 会导致函数嵌套较多. 无法支持异步的promise模式.
因此, 我在微信JSSDK的音频接口上又封装了一层, 使它:
- 兼顾Desktop和微信调试.
- 绕过微信JSSDK的BUG, 让录音操作更加Robust, 快速连按不易出错.
- 既支持回调函数, 又支持异步的promise模式.
于是就有了audio.js.
以下API的option均接受success, fail和complete三个callback, 作用与微信JSSDK中的描述一致.
相应地, 你还可以用jQuery Promise中的done, fail, always和then挂上callback.
示例:
audio.startRecord({
success: function() { console.log('This is a success callback.'); },
fail: function() { console.log('This is a fail callback.'); },
complete: function() { console.log('This is a complete callback.'); }
})
.done(function() { console.log('This is another success callback.'); });
.fail(function() { console.log('This is another fail callback.'); })
.always(function() { console.log('This is another complete callback.'); })
onRecordTimeout: 当录音超时时的callback. 在微信中, 录音时限为1分钟, 此callback相当于wx.onVoiceRecordEnd中注册的callback. 在Desktop上暂时忽略这个callback.
示例:
audio.startRecord({
// other callbacks...
onRecordTimeout: function() { console.log('Recording is timeout.'); }
});
示例:
audio.stopRecord()
.done(function(res) {
console.log(res.localId);
})
.fail(function(res) {
console.log(res.errMsg);
})
示例:
audio.stopRecord()
.then(function(res) {
res.isShowProgressTips = 0; // Hide the progress tips in WeChat.
return audio.uploadVoice(res);
})
.done(function(res) {
console.log(res.localId);
if (res.isFromWeChat) {
console.log(res.serverId);
} else {
console.log(res.binary);
}
})
localId: stopRecord或uploadVoice返回的localId.
onPlayEnd: 当播放录音结束时的callback. 在微信中, 相当于wx.onVoicePlayEnd中注册的callback.
示例:
audio.playRecord({
localId: self.localId,
success: function () { console.log('Record starts playing.'); },
onPlayEnd: function () { console.log('Record ends playing.'); }
});
localId: stopRecord或uploadVoice返回的localId.
示例:
audio.stopPlayRecord({
localId: self.localId
});
- jquery: 用到了jquery的异步接口deferred, promise. 还有一小部分是用来在Desktop上播放录音用.
- 微信JSSDK: 在微信客户端上, audio.js会调用微信JSSDK提供的音频接口
- recorder.js和recorderWorder.js: 在Desktop上, audio.js会调用recorder.js提供的录音接口.
注: 这是recorderjs的Demo页面. 从源代码里我找到的recorder.js和recorderWorker.js. 但是recorder.js的Github页面上只能看到recorder.js, 看不到recorderWorker.js. Issue #154问了这个问题, 还未收到回复.
- Chrome不允许本地文件
file:///开启录音功能, 参见Chrome getUserMedia Not Requesting Permission Locally. 想Desktop测试录音功能, 需要通过本地服务器访问index.html. 我尝试了--allow-file-access-from-files但是并没有起作用. - 如果你的WebApp部署在服务器上, 请用
https. 否则Chrome会报错:
getUserMedia() no longer works on insecure origins. To use this feature, you should consider switching your application to a secure origin, such as HTTPS. See https://goo.gl/rStTGz for more details.
以下测试都在iPhone 6 Plus上进行.
-
startRecord后, 从屏幕底部上划打开iPhone的设置菜单, 再关闭菜单. 进入假死状态.
-
startRecord后, 点击主菜单按钮退回主菜单, 在退出过程中会观察到屏幕上方有红色的banner, 显示"微信"两个字, 是正在录音的意思. 但是一旦退回主菜单之后, 那个红色的banner就会消失.
重新进入微信, 此时进入假死状态.
所谓的假死状态是指, 微信显示"录音中", 但是其实并没有在录音.
此时startRecord会失败, errMsg: fail. stopRecord之后不会触发callback, 而且仍然显示"录音中".
要想重新录音, 必须要stopRecord一次 (这次录音是失败的), 然后再依次startRecord, endRecord才可以.
我的测试结果是, 三个callback都不会被触发(但是我怎么记得以前会显示NotRecording…)!
我觉得这应该算是一个bug, 如果没有在录音但是调用了endRecord, 那应该fail并且errMsg为NotRecording.
微信JSSDK在iPhone上有个bug: 录音之后, 播放声音(如audio, video)都会通过听筒(earphone. 如果没插耳机, 就是通过iPhone上部的听筒; 否则就是通过耳机), 而不是外放(speaker), 如果你用外放的话这会让你感觉声音变小了很多; 如果你用耳机的话, 这不会产生影响.
我的解决方法是: 每次录音结束(stopRecord)之后立即调用playRecord和stopPlayRecord, 因为我发现playRecord一次后声音就正常地从外放播放出来了.
Copyright © 2016 Richard Liu
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- 完善文档
- 目前只支持Requirejs方式
- 加上pauseRecord? 如果有人需要的话.