The IAVIStream interface supports creating and manipulating data streams within a file. Uses IUnknown::QueryInterface, IUnknown::AddRef, IUnknown::Release in addition to the following custom methods:
| Method | Description |
| Create | Initializes a stream handler that is not associated with any file. |
| Delete | Deletes data from a stream. |
| Info | Fills and returns an AVISTREAMINFO structure with information about a stream. |
| FindSample | Obtains the position in a stream of a key frame or a nonempty frame. |
| Read | Reads data from a stream and copies it to an application-defined buffer. |
| ReadData | Reads data headers, format data, or nonaudio and nonvideo data. (Use the Read method to read audio and video data.) |
| ReadFormat | Obtains format information from a stream. |
| SetFormat | Sets format information in a stream. |
| Write | Writes data to a stream. |
| WriteData | Writes data headers, format data, or nonaudio and nonvideo data. (Use the Write method to write audio and video data.) |
Custom File and Stream Handlers Overview, Custom File and Stream Handler Interfaces