IAMExtTransport::GetTransportVideoParameters method (strmif.h)

Article
07/27/2023

[The feature associated with this page, DirectShow, is a legacy feature. It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation. Those features have been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use MediaPlayer, IMFMediaEngine and Audio/Video Capture in Media Foundation instead of DirectShow, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]

The GetTransportVideoParameters retrieves video parameter settings for external transport.

This method is not implemented.

Syntax

HRESULT GetTransportVideoParameters(
  [in]  long Param,
  [out] long *pValue
);

Parameters

[in] Param

Specifies the video parameter to retrieve. Must be one of the following values.

Value	Description
ED_TRANSVIDEO_SET_OUTPUT	Retrieves the output mode.
ED_TRANSVIDEO_SET_SOURCE	Retrieves the input pin.

[out] pValue

Specifies a pointer to a long integer to receive the video parameter. See Remarks for more information.

Return value

When this method succeeds, it returns S_OK. Otherwise it returns an HRESULT error code.

Remarks

If Param equals ED_TRANSVIDEO_SET_OUTPUT, pValue receives one of the following constants.

Value	Description
ED_E2E	Input video is displayed on the device's output regardless of the transport mode.
ED_OFF	Video output is disabled.
ED_PLAYBACK	Video playing from media is displayed on the device's output.

If Param equals ED_TRANSVIDEO_SET_SOURCE, pValue receives the index of the input pin used for the video input. The pin index is zero-based.

DV Implementation

MSDV does not support this method. It returns E_NOTIMPL.

Requirements

Requirement	Value
Minimum supported client	Windows 2000 Professional [desktop apps only]
Minimum supported server	Windows 2000 Server [desktop apps only]
Target Platform	Windows
Header	strmif.h (include Dshow.h)
Library	Strmiids.lib

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