H264EncodingProfile和H264EncodingLevel没有任何影响？ [英] H264EncodingProfile and H264EncodingLevel not having any effect ?

问题描述

我正在尝试设置不同的H264编码配置文件和级别，但似乎无论我放置什么值，它都没有效果，我得到的视频总是具有相同的大小和质量。我有什么问题吗？ 

 
 async public void initCamera（Windows.Foundation。大小s）
 {
 _audioVideoCaptureDevice = await AudioVideoCaptureDevice.OpenAsync（CameraSensorLocation.Back，s）; 
 
 _audioVideoCaptureDevice.VideoEncodingFormat = CameraCaptureVideoFormat.H264; 
 
 _audioVideoCaptureDevice.SetProperty（KnownCameraAudioVideoProperties.H264EncodingProfile，H264EncoderProfile.ConstrainedBaseline）; 
 _audioVideoCaptureDevice.SetProperty（KnownCameraAudioVideoProperties.H264EncodingLevel，H264EncoderLevel.Level1）; 
 _audioVideoCaptureDevice.SetProperty（KnownCameraAudioVideoProperties.VideoFrameRate，15）; 
} 
 
 async public void startRecording（）
 {
 StorageFolder localFolder = ApplicationData.Current.LocalFolder; 
 StorageFile storageFile = await localFolder.CreateFileAsync（" test.mp4"，CreationCollisionOption.ReplaceExisting）; 
 
 path = storageFile.Path; 
 
 if（storageFile！= null）
 
 {
 
 sst = await storageFile.OpenAsync（FileAccessMode.ReadWrite）; 
 await _audioVideoCaptureDevice.StartRecordingToStreamAsync（sst）; 
} 
} 
 

解决方案

这些属性中的大多数都是只读的。请参阅此
文档。

您的主要枚举选项似乎是
CameraCaptureVideoFormat 。

ChatterBox VoIP示例可能对您开发项目有所帮助。

希望这会有所帮助，但是b $ b -Mark

I'm trying to set different H264 encoding profiles and level, but it seems no matter what value I put, it has no effect and the video I get always has the same size and quality. Is there something I'm doing wrong ? 

async public void initCamera(Windows.Foundation.Size s)
{
    _audioVideoCaptureDevice = await AudioVideoCaptureDevice.OpenAsync(CameraSensorLocation.Back, s);

    _audioVideoCaptureDevice.VideoEncodingFormat = CameraCaptureVideoFormat.H264;

    _audioVideoCaptureDevice.SetProperty(KnownCameraAudioVideoProperties.H264EncodingProfile, H264EncoderProfile.ConstrainedBaseline);
    _audioVideoCaptureDevice.SetProperty(KnownCameraAudioVideoProperties.H264EncodingLevel, H264EncoderLevel.Level1);
    _audioVideoCaptureDevice.SetProperty(KnownCameraAudioVideoProperties.VideoFrameRate, 15);
}

async public void startRecording()
{
    StorageFolder localFolder = ApplicationData.Current.LocalFolder;
    StorageFile storageFile = await localFolder.CreateFileAsync("test.mp4", CreationCollisionOption.ReplaceExisting);

    path = storageFile.Path;

    if (storageFile != null)
    {
        sst = await storageFile.OpenAsync(FileAccessMode.ReadWrite);
        await _audioVideoCaptureDevice.StartRecordingToStreamAsync(sst);
    }
}

解决方案

Hi,

Most of those properties are read-only. See this documentation.

It appears that your main enumeration choices are CameraCaptureVideoFormat .

The ChatterBox VoIP sample might be helpful to you in developing your project.

Hope this helps,
-Mark

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