Graphics - Additional Qualifications - Format Change

Note This content applies to the Windows Logo Kit (WLK). For the latest information using the new Windows Hardware Certification Kit (HCK), see Windows HCK User's Guide on the Windows Hardware Dev Center.

Type: Automated test


The Graphics - Additional Qualifications – Format Change test verifies that a graphics card can handle a format change between high-bit-rate H.264 and MPEG-2 video.


Windows Media Center displays an H.264 and MPEG-2 stream. The test succeeds if it reaches an acceptable frame rate after the channel change.

This test verifies the following requirements:

GRAPHICS-0025: Display driver supports the DirectX VA 2.0 Video Decoder DDI

Success: This test succeeds if the device driver and device complete the following actions successfully:

  • Windows Media Center is launched and the guide is selected.

  • Tune to the H.264 video stream for three minutes.

  • Bring up the guide and then tune to the MPEG-2 channel.

  • A helper thread is started to monitor the frame rate while the second stream is playing. The frame rate must reach a consistent 20 fps within 20 seconds of the second tune.

Failure: This test fails if:

  • The frame rate has not reached 20 fps consistently 20 seconds after the second tune.
  • Any of the preceding steps fail.

Run time: 5 minutes

Log file: TvWLPlog.xml

System restart required: No

Supported operating systems for additional qualifications logo testing:

  • Windows 7


Software Requirements

The test tool requires the following software:

  • Supported operating system (see list above)

  • Software components included with the device that is being tested

  • Tuner driver

Hardware Requirements

The test tool requires the following hardware:

  • The device under test

  • 1-GHz processor

  • 1 GB of system RAM

  • 40 GB free disk space

  • Audio support

  • Windows keyboard

  • Two button pointing device

  • Minimum graphics card and display support:

    • DirectX 9 support
    • Supported Windows Display Driver Model (WDDM) driver
    • 128 MB of on-board graphics card memory
    • Pixel Shader 2.0 support
    • 32 bits per pixel support


The test tool runs on the following processor architectures:

  • x86

  • x64

Running the Test

Schedule the test in Driver Test Manager (DTM) Studio.

Code Tour

File Manifest

File Location

Contents of the Default Location

[%Program Files%]\Microsoft Driver Test Manager\Tests\<architecture>\nttest\multimediatest\ehome\Tools

Test Assertions

GUID: 377CB100-5472-4c18-9459-46DBF0EBB0E6

Build date: 9/14/2012