无法使用MediaCapture从音频设备录制mp3文件

本文介绍了无法使用MediaCapture从音频设备录制mp3文件的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述 大家好， 我想问你的专业 经验  解决我的问题。我正在尝试使用音频设备（麦克风）和MediaCapture类录制mp3文件。 我找到了一些链接和 资源  它是如何工作的，类似于  http：//msdn.microsoft.com/en-us/library/windows/apps/hh452798.aspx 和  http://code.msdn.microsoft.com/windowsapps/Media-Capture-Sample-adf87622/ 很遗憾  它对我不起作用。结果媒体文件（audioCapture.mp3或audioCapture.m4a）已经创建但它总是空的。 我也试图对MediaCapture使用一些不同的设置，这里只是一个例子： captureInitSettings = null; captureInitSettings = new Windows.Media.Capture.MediaCaptureInitializationSettings（）; captureInitSettings.audioDeviceId ="" ;;        captureInitSettings.videoDeviceId ="" ;; captureInitSettings.streamingCaptureMode = Windows.Media.Capture.StreamingCaptureMode.audio; captureInitSettings.photoCaptureSource = Windows.Media.Capture.PhotoCaptureSource.videoPreview; captureInitSettings.realTimeModeEnabled = true; if（deviceList.length> 0） captureInitSettings.audioDeviceId = deviceList [0] .id; 但在此之后，以下代码只是创建一个空文件： Windows.Storage.KnownFolders.musicLibrary.createFileAsync（" audioCapture.mp3"，Windows .Storage.CreationCollisionOption.generateUniqueName）.done（function（newFile）{ storageFile = newFile; oMediaCapture.startRecordToStorageFileAsync（profile，storageFile）.done（function（file）{ // some代码在这里}，函数（错误）{ WinJS.log&& WinJS.log（错误，"样本"，"错误"）; }）; }）; 我还创建了一个分配给单独按钮的附加功能来停止录制： oMediaCapture.stopRecordAsync（）。done（function（result）{ record State = false; //播放录制的视频。 var audio = id（" capturedAudio"）; audio.src = URL.createObjectURL（storageFile，{oneTimeOnly：true}）; audio.play（）; id（" message"）。innerHTML =" Record Stopped。档案" + storageFile.path +"英寸; localSettings.values [audioKey] = storageFile.path; }， errorHandler）; 它不起作用！ 创建的文件为空通常。 你能帮我或告诉我这里有什么问题吗？ ps：以下相机（照片）捕获示例工作正常 -   http://code.msdn.microsoft.com/windowsapps/CameraCaptureUI-Sample -845a53ac 提前致谢！ Dmitry $ $ 解决方案 您好， 关于您的代码，在开始记录时，您正在致电： MediaCapture.startRecordToStorageFileAsync 停止记录时，您正在调用： oMediaCapture.stopRecordAsync 所以看起来MediaCapture和oMediaCapture是两个不同的对象。 需要它在开始和结束方法中使用相同的对象。 最好的问候， Ming Xu。 Hello guys,I would to ask your professional experience to solve my issue. I'm trying to record a mp3 file using the audio device (microphone) and MediaCapture class.I have found a few link and resources how it works, something like http://msdn.microsoft.com/en-us/library/windows/apps/hh452798.aspx and http://code.msdn.microsoft.com/windowsapps/Media-Capture-Sample-adf87622/Unfortunately it doesn't work for me. As a result the media file (audioCapture.mp3 or audioCapture.m4a) has been created but it is always empty.I also was trying to use some different settings to MediaCapture, here is just one example:captureInitSettings = null;captureInitSettings = new Windows.Media.Capture.MediaCaptureInitializationSettings();captureInitSettings.audioDeviceId = "";        captureInitSettings.videoDeviceId = "";captureInitSettings.streamingCaptureMode = Windows.Media.Capture.StreamingCaptureMode.audio;captureInitSettings.photoCaptureSource = Windows.Media.Capture.PhotoCaptureSource.videoPreview;captureInitSettings.realTimeModeEnabled = true;if (deviceList.length > 0) captureInitSettings.audioDeviceId = deviceList[0].id;But after that the following code just creating an empty file:Windows.Storage.KnownFolders.musicLibrary.createFileAsync("audioCapture.mp3", Windows.Storage.CreationCollisionOption.generateUniqueName).done(function (newFile) { storageFile = newFile; oMediaCapture.startRecordToStorageFileAsync(profile, storageFile).done(function (file) { // some code here }, function (err) { WinJS.log && WinJS.log(err, "sample", "error"); }); });I also have created one additional function assigned to the separate button to stop recording:oMediaCapture.stopRecordAsync().done(function (result) { recordState = false; // Playback the recorded video. var audio = id("capturedAudio"); audio.src = URL.createObjectURL(storageFile, { oneTimeOnly: true }); audio.play(); id("message").innerHTML = "Record Stopped. File " + storageFile.path + " "; localSettings.values[audioKey] = storageFile.path; }, errorHandler);It doesn't work!Created file is empty as usual.Could you please help me or tell me what is wrong here?p.s.: the following Camera (Photo) Capture example works fine - http://code.msdn.microsoft.com/windowsapps/CameraCaptureUI-Sample-845a53acThanks in advance!Dmitry 解决方案 Hi,Regard to your code, when starting the record, you’re calling:MediaCapture.startRecordToStorageFileAsyncWhen stopping the record, you’re calling:oMediaCapture.stopRecordAsyncSo it looks like MediaCapture and oMediaCapture are two different objects. It is needed to use the same object in both start and stop methods.Best Regards,Ming Xu. 这篇关于无法使用MediaCapture从音频设备录制mp3文件的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！