MediaTranscoder.PrepareStreamTranscodeAsync 方法
重要
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异步初始化指定流上的 trancode 操作，并返回可用于启动转码操作的 PrepareTranscodeResult 对象。
public:
virtual IAsyncOperation<PrepareTranscodeResult ^> ^ PrepareStreamTranscodeAsync(IRandomAccessStream ^ source, IRandomAccessStream ^ destination, MediaEncodingProfile ^ profile) = PrepareStreamTranscodeAsync;IAsyncOperation<PrepareTranscodeResult> PrepareStreamTranscodeAsync(IRandomAccessStream const& source, IRandomAccessStream const& destination, MediaEncodingProfile const& profile);public IAsyncOperation<PrepareTranscodeResult> PrepareStreamTranscodeAsync(IRandomAccessStream source, IRandomAccessStream destination, MediaEncodingProfile profile);function prepareStreamTranscodeAsync(source, destination, profile)Public Function PrepareStreamTranscodeAsync (source As IRandomAccessStream, destination As IRandomAccessStream, profile As MediaEncodingProfile) As IAsyncOperation(Of PrepareTranscodeResult)- destination
- IRandomAccessStream
目标流。
- profile
- MediaEncodingProfile
要用于操作的配置文件。
此方法完成后，将返回可用于启动转码的 PrepareTranscodeResult 对象。
以下示例演示如何使用此方法对流进行转码。
var transcoder = new Windows.Media.Transcoding.MediaTranscoder();
return transcoder.prepareStreamTranscodeAsync(sourceStream, destinationStream, profile);
源参数不能是 InMemoryRandomAccessStream 或其他可写流。
| 产品 | 版本 |
|---|---|
| WinRT | Build 10240, Build 10586, Build 14383, Build 15063, Build 16299, Build 17134, Build 17763, Build 18362, Build 19041, Build 20348, Build 22000, Build 22621, Build 26100 |