C# 微软表达式编码器。捕捉

我注意到Expression Encoder 4屏幕录制有时比指定的短。例如，5分钟的录音只能产生15秒的视频。这似乎与视频同时捕获的音频有关。最初，我使用耳机扬声器作为音频配置文件。当我从录音中删除字幕音频时，问题就停止了。当我将音频配置文件更改为标准扬声器时，它也停止了。然而，当录音开始时，通过快速改变音量，我可以很容易地重现它。结果是录音被冻结了。。。记录仍然需要5分钟；但结果只有15秒左右的视频

代码片段如下所示

        try
        {
            _screenCaptureJob = new ScreenCaptureJob();
            _screenCaptureJob.CaptureRectangle = _screenRectangle;
            _screenCaptureJob.ShowFlashingBoundary = true;
            _screenCaptureJob.ScreenCaptureVideoProfile.FrameRate = 20;
            _screenCaptureJob.CaptureMouseCursor = false;

            _screenCaptureJob.ScreenCaptureCommandFinished += new EventHandler<ScreenCaptureCommandFinishedEventArgs>(_screenCaptureJob_ScreenCaptureCommandFinished);
            _screenCaptureJob.ScreenCaptureFinished += new EventHandler<ScreenCaptureEventArgs>(_screenCaptureJob_ScreenCaptureFinished);

            Collection<EncoderDevice> audioDevices = EncoderDevices.FindDevices(EncoderDeviceType.Audio);
            try
            {
                EncoderDevice foundDevice = audioDevices.First(delegate(EncoderDevice item) { return item.Name.StartsWith(@"Speakers"); });
                _screenCaptureJob.AddAudioDeviceSource(foundDevice);
            }
            catch (Exception ex)
            {
                _appLogger.Error(string.Format("RecordNextSegment. Cannot find prefered audio device using {0} !", audioDevices[0].Name), ex);
                _screenCaptureJob.AddAudioDeviceSource(audioDevices[0]);
            }
            _currentDurationInSeconds = (_recordDurationInSeconds < _maxSegmentDurationInSeconds) ? _recordDurationInSeconds : _maxSegmentDurationInSeconds;

            _screenCaptureJob.Duration = DateTimeUtilities.DurationToTimeSpan(_currentDurationInSeconds);
            _screenCaptureJob.OutputScreenCaptureFileName = string.Format(@"{0}\{1}.wmv", _tvaConfiguration.TVAVideoDirectoryRawVideo, FileNameFromSegment(_segmentNumber ));
             _screenCaptureJob.Start();
            LogInfo(string.Format("Remaining time (seconds): {0}. Current time: {1}. File: {2}", _recordDurationInSeconds, _currentDurationInSeconds, _screenCaptureJob.OutputScreenCaptureFileName));

试试看
{
_screenCaptureJob=新建screenCaptureJob（）；
_screenCaptureJob.CaptureRectangle=\u screenRectangle；
_screenCaptureJob.ShowFlashingBoundary=true；
_screenCaptureJob.ScreenCaptureVideoProfile.FrameRate=20；
_screenCaptureJob.CaptureMouseCursors=false；
_screenCaptureJob.ScreenCaptureCommandFinished+=新事件处理程序（\u screenCaptureJob\u ScreenCaptureCommandFinished）；
_screenCaptureJob.ScreenCaptureFinished+=新事件处理程序（\u screenCaptureJob\u ScreenCaptureFinished）；
采集音频设备=EncoderDevices.FindDevices（EncoderDeviceType.Audio）；
尝试
{
EncoderDevice foundDevice=audioDevices.First（委托（EncoderDevice项）{return item.Name.StartsWith（@“Speakers”）；}）；
_screenCaptureJob.AddAudioDeviceSource（foundDevice）；
}
捕获（例外情况除外）
{
_appLogger.Error（string.Format（“RecordNextSegment.not-find preferred audio devices using{0}！”，audioDevices[0].Name），ex）；
_screenCaptureJob.AddAudioDeviceSource（audioDevices[0]）；
}
_currentDurationInSeconds=（\u recordDurationInSeconds<\u maxSegmentDurationInSeconds）？\u recordDurationInSeconds:\u maxSegmentDurationInSeconds；
_screenCaptureJob.Duration=DateTimeUtilities.DurationToTimeSpan（\u currentDurationInSeconds）；
_screenCaptureJob.OutputScreenCaptureFileName=string.Format（@“{0}\{1}.wmv”，_-tvaConfiguration.tvavideDirectoryRawVideo，FileNameFromSegment（_-segmentNumber））；
_screenCaptureJob.Start（）；
LogInfo（string.Format（“剩余时间（秒）：{0}。当前时间：{1}。文件：{2}”，_recordDurationInSeconds，_currentDurationInSeconds，_screenCaptureJob.OutputScreenCaptureFileName））；

不确定如何解决您的问题，但想为您提供一些关于音频问题的信息。在这两台机器上，我测试了我的应用程序，屏幕截图以及音频工作正常。因此，我只能得出结论，这可能与您的硬件有关，或者与您的代码有关。。。（可能调试通过它？）

此外，您的解决方案可能与相同