Creating Temporary Streams

Temporary streams can be beneficial in several ways. You can use a temporary stream as a work stream, for example, when changing the stream format. Or you can create a temporary stream to hold portions of other streams that have been copied.

You can create a stream in memory that is not associated with any file by using the AVIStreamCreate1DDV56O function. This function returns the address of the interface to the new stream in a specified location and is used internally by other functions that create temporary streams.

You can create a compressed stream from an uncompressed stream by using the AVIMakeCompressedStream4R_PHG function. You identify the stream to compress, the compression method and compression options, and the handler for the new stream.

When you finish using a stream created with AVIStreamCreate or AVIMakeCompressedStream, close the stream by using the AVIStreamRelease205XGN function. AVIStreamRelease frees the resources the temporary stream used.