| Microsoft DirectX 9.0 |
Provides methods for manipulating tracks in DirectShow Editing Services (DES).
A track contains a list of sources that are rendered in the final output. Sources within the same track may not overlap. Video tracks can have both effects and transitions. The render engine applies effects before it applies transitions. Audio tracks can have effects, but not transitions.
For more information, see The Timeline Model.
This object has the following methods.
| Method | Description |
| AreYouBlank | Determines whether the track is blank (contains no source objects). |
| GetNextSrc | Not supported for Visual Basic. |
| GetNextSrc2 | Searches the track for the next source that appears at the specified time or later. |
| GetNextSrcEx | Retrieves the next source after the specified source. |
| GetSourcesCount | Retrieves the number of sources in the track. |
| GetSrcAtTime | Not supported for Visual Basic. |
| GetSrcAtTime2 | Retrieves the source object nearest to the specified time, according to specified boundary conditions. |
| InsertSpace | Not supported in Visual Basic. |
| InsertSpace2 | Splits any objects that exist at the specified time and inserts space between them. |
| MoveEverythingBy | Not supported for Visual Basic. |
| MoveEverythingBy2 | Not supported for Visual Basic. |
| SrcAdd | Adds a source to the track. |
| ZeroBetween | Not supported for Visual Basic. |
| ZeroBetween2 | Removes everything from the track between the specified times. |