IDvdInfo2::GetDiscID 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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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 GetDiscID method retrieves a system-generated 64-bit identification number for the specified DVD.

Syntax

HRESULT GetDiscID(
  [in]  LPCWSTR   pszwPath,
  [out] ULONGLONG *pullDiscID
);

Parameters

[in] pszwPath

Path of the volume to use for the disc ID. Specify NULL to use the current or default DVD volume.

[out] pullDiscID

Receives the 64-bit disc ID.

Return value

Returns one of the following HRESULT values.

Return code	Description
S_OK	Success.
E_INVALIDARG	Invalid argument.
E_UNEXPECTED	The DVD Navigator is not initialized.
VFW_E_DVD_INVALID_DISC	The specified path is not a valid DVD disc.

Remarks

The DVD Navigator calculates an identifier ID based on file sizes, dates, and other information, and not the BCA (burst cutting area) value. This number is guaranteed to be the same each time the disc is played. The ID applies to all replicated copies of a disc. In other words, all copies of a specific movie will have the same ID. The odds that two separate titles will have the same ID is sufficiently remote that this ID can be considered "unique" for all practical purposes.

Requirements

Requirement	Value
Minimum supported client	Windows XP [desktop apps only]
Minimum supported server	Windows Server 2003 [desktop apps only]
Target Platform	Windows
Header	strmif.h (include Dshow.h)
Library	Strmiids.lib