---
title: "DSReader..::.IsFrameSeekable Property "
canonical: https://www.graphicsmill.com/docs/gm5/P_Aurigma_GraphicsMill_Codecs_DSReader_IsFrameSeekable.htm
product: "Graphics Mill 5.5 for .NET"
---

This documentation is for the old version. [Go to the latest Graphics Mill docs](https://www.graphicsmill.com/docs/gm/)

# DSReader.IsFrameSeekable Property 
 
Gets a value specifying whether the opened file is seekable by index.
 
**Namespace:** [Aurigma.GraphicsMill.Codecs](https://www.graphicsmill.com/docs/gm5/N_Aurigma_GraphicsMill_Codecs.htm.md)
 **Assembly:** Aurigma.GraphicsMill.Codecs.MediaProcessor (in Aurigma.GraphicsMill.Codecs.MediaProcessor.dll)
 
## Syntax
  
```
Public Overrides NotOverridable ReadOnly Property IsFrameSeekable As Boolean
```
 
```csharp
public override sealed bool IsFrameSeekable { get; }
```
 
### Property Value
A [Boolean](http://msdn2.microsoft.com/en-us/a28wyd50) value specifying whether the opened file is seekable by index (random access is available). If the file is not seekable, only sequential access is possible (i.e. to read `N`th frame you need to load `N-1` frames).
 
### Implements
 
[IFormatReader.IsFrameSeekable](https://www.graphicsmill.com/docs/gm5/P_Aurigma_GraphicsMill_Codecs_IFormatReader_IsFrameSeekable.htm.md)
 
## Remarks
  
It is possible to convert non-seekable ASF files to seekable ones. To do it, you should create an index for such files using the [AsfIndexer](https://www.graphicsmill.com/docs/gm5/T_Aurigma_GraphicsMill_Codecs_AsfIndexer.htm.md) class.
 
The frame type returned by the reader depends on this property. For seekable files [DSFrame](https://www.graphicsmill.com/docs/gm5/T_Aurigma_GraphicsMill_Codecs_DSFrame.htm.md) instances are returned. For non-seekable ones - [DSPreLoadedFrame](https://www.graphicsmill.com/docs/gm5/T_Aurigma_GraphicsMill_Codecs_DSPreLoadedFrame.htm.md).
   
## See Also

### Reference

- [DSReader Class](https://www.graphicsmill.com/docs/gm5/T_Aurigma_GraphicsMill_Codecs_DSReader.htm.md)
- [Aurigma.GraphicsMill.Codecs Namespace](https://www.graphicsmill.com/docs/gm5/N_Aurigma_GraphicsMill_Codecs.htm.md)
- [Aurigma.GraphicsMill.Codecs.AsfIndexer](https://www.graphicsmill.com/docs/gm5/T_Aurigma_GraphicsMill_Codecs_AsfIndexer.htm.md)