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DeviceInfo.ProtocolInfo Property

  • Article

Gets information about the protocol used by the device.

Note   This property has been deprecated.

Syntax

  DeviceInfo.ProtocolInfo

Property Value

A read-only String.

Remarks

Partner applications can query Media Center Extender devices to determine the supported audio/visual (AV) media file formats supported by devices. Windows Media Center Extender devices use the protocolinfo string to expose the supported AV formats of the specific Extender device.

If the DeviceInfo.ProtocolInfo string query returns null, you can assume that the following AV formats are supported at a minimum:

Audio Formats

Name Minimum Supported Notes
MP3 Sample rate: 48 kilohertz (kHz)

Number of channels: 2

Max bit rate: 320 kilobits per second (Kbps)

 MP3 file set to a high encoding setting.
Windows Media Audio (WMA) Standard Sample rate: 11.025 kHz, 16 kHz, 22.05 kHz, 32 kHz, 44.1 kHz, 48 kHz

Number of channels: 2

Max bit rate: 192 Kbps

 WMA file set to a high encoding setting.

Windows Media DRM is supported up to L2000.
WMA Pro Sample rate: 11.025 kHz, 16 kHz, 22.05 kHz, 32 kHz, 44.1 kHz, 48 kHz, 96 kHz

Number of channels: 2, 6, 8

Max bit rate: 1.5 megabits per second (Mbps)

 Windows Media DRM is supported up to L2000.
WMA Lossless Sample rate: Up to 192 kHz

Number of channels: 2, 6, 8

 Windows Media DRM-protected WMA Lossless is not supported.

Video Formats

Name Minimum Supported
MPEG-1

Audio: MPEG 1 Layer 1 & 2

 Video:
  • Resolution: Up to 352 x 240 (NTSC), 352 x 288 (PAL)
  • Max bit rate: 1.856 Mbps
  • Frame rate: 23.976/24 frames per second (fps), 25 fps (PAL), 29.97/30 fps (NTSC)

Audio (MPEG 1 L1 and L2):

  • Sample rate: 44.1 kHz
  • Number of channels: 2
  • Max bit rate: 224 Kbps
MPEG-2

Audio: MPEG 1 Layers 1 & 2 & AC3

 Video:
  • Profile: Main at High Level
  • Resolution: Up to 1920 x 1080 x 30 fps and 1920 x 1152 x 25 FPS
  • Max bit rate: CBR and VBR up to 19.39 Mbps
  • Frame rate: 23.976/24 fps, 25 fps (PAL), 29.97/30 fps (NTSC)

Audio (MPEG 1 L1 & L2):

  • Sample rate: 44.1 kHz
  • Number of channels: 2
  • Max bit rate: 224 Kbps

- OR -

Audio (AC-3):

  • Sample rate: 48 kHz
  • Number of channels: 6
  • Max bit rate: 448 Kbps
VC-1 Profile: Main Profile at High Level

Resolution: 1920 x 1080 @ 30 hertz (Hz) (1080p)

Max bit rate: CBR and VBR up to 20 Mbps

Frame rate: 24 fps, 25 fps, 30 fps

Audio:  WMA Standard or Pro
VC-1 Profile: Advanced Profile at Level 2

Resolution: 720 x 480 @ 60 Hz (480p) and 1280 x 720 @ 30 Hz (720p)

Max bit rate: CBR and VBR up to 20 Mbps

Frame rate: 24 fps, 25 fps, 30 fps

Audio:  WMA Standard or Pro

A Media Center Extender device may also opt to adopt a Digital Living Network Alliance (DLNA) compliant string format for displaying the above information. For example, the AV formats described earlier would be translated into the following strings:

http-get:*:audio/L16:MICROSOFT.COM_PN=WAV_PCM

http-get:*:audio/mpeg:DLNA.ORG_PN=MP3

http-get:*:audio/x-ms-wma:DLNA.ORG_PN=WMAFULL

http-get:*:audio/x-ms-wma:DLNA.ORG_PN=WMAPRO

http-get:*:audio/x-ms-wma:MICROSOFT.COM_PN=WMALSL

http-get:*:video/mpeg:DLNA.ORG_PN=MPEG_PS_NTSC

http-get:*:video/mpeg:DLNA.ORG_PN=MPEG_PS_PAL

http-get:*:video/mpeg:DLNA.ORG_PN=MPEG1

http-get:*:video/mpeg:MICROSOFT.COM_PN=DVRMS_MPEG2

http-get:*:video/x-ms-wmv:DLNA.ORG_PN=WMVHIGH_FULL

http-get:*:video/x-ms-wmv:DLNA.ORG_PN=WMVHIGH_PRO

http-get:*:video/x-ms-wmv:DLNA_PN=WMVHIGH_FULL

http-get:*:video/x-ms-wmv:DLNA_PN=WMVHIGH_PRO

rtsp-rtp-udp:*:audio/mpeg:*

rtsp-rtp-udp:*:audio/x-ms-wma:*

rtsp-rtp-udp:*:audio/x-ms-wma:*

rtsp-rtp-udp:*:audio/x-ms-wma:*

rtsp-rtp-udp:*:video/mpeg:*

rtsp-rtp-udp:*:video/mpeg:*

rtsp-rtp-udp:*:video/x-ms-wmv:*

rtsp-rtp-udp:*:video/x-ms-wmv:*

rtsp-rtp-udp:*:video/x-ms-wmv:*

rtsp-rtp-udp:*:video/x-ms-wmv:*

Requirements

Platform: HTML application hosted within Windows XP Media Center Edition 2004 through Windows Vista

See Also