This method determines if a specified time format is supported.

HRESULT IsFormatSupported(
  const GUID* pFormat


  • pFormat
    [in] Time format to compare.

Return Values

Returns an HRESULT value that depends on the implementation of the interface. The default DirectShow implementation returns S_OK if the time format is supported; otherwise returns S_FALSE.


Time formats are defined as follows.

Format Description
TIME_FORMAT_NONE Seeking is not supported.
TIME_FORMAT_FRAME Seeks to specific video frames.
TIME_FORMAT_SAMPLE Seeks to samples in the stream.
TIME_FORMAT_FIELD Seeks to interlaced video fields.
TIME_FORMAT_BYTE Seeks to a byte in the stream.
TIME_FORMAT_MEDIA_TIME Seeks to time stamps on the media samples.

Third-party vendors are encouraged to add their own time formats to this list.


DirectShow applications and DirectShow filters have different include file and link library requirements. See Setting Up the Build Environment for more information.

OS Versions: Windows CE 2.12 and later. Version 2.12 requires DXPAK 1.0 or later.

See Also

IMediaSeeking Interface

Last updated on Wednesday, April 13, 2005

© 2005 Microsoft Corporation. All rights reserved.