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In addition to the methods inherited from IUnknown, the IWMWriter interface exposes the following methods.
| Method | Description |
| AllocateSample | Allocates a buffer that you can use to supply samples to the writer. |
| BeginWriting | Initializes the writing process. |
| EndWriting | Terminates the writing process. |
| Flush | Clears the writer of data, leaving the writer prepared to run again for the next WriteSample method call. |
| GetInputCount | Retrieves the number of uncompressed input streams. |
| GetInputFormat | Retrieves possible media formats for the specified input. |
| GetInputFormatCount | Retrieves the number of format types supported by this input on the writer. |
| GetInputProps | Retrieves the media properties of an input stream, if an index is specified. |
| SetInputProps | Specifies the media properties of an input stream, if an index is specified. |
| SetOutputFilename | Specifies the name of the file to be written. |
| SetProfile | Specifies the profile to use for the current writing task, using a pointer to an IWMProfile object. |
| SetProfileByID | Specifies the profile to use for the current writing task, identifying the profile by itsglobally unique identifier. |
| WriteSample | Passes in uncompressed data to be compressed and appended to the Windows Media file that is being created. |
Call QueryInterface on IWMWriter for a pointer to IWMHeaderInfo and IWMWriterAdvanced interfaces.
See Also
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