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ILMDVRSink::GetTimedFragmentAlignment

Summary

Takes the user-supplied byte range and scans for transport fragment boundaries.

Syntax

#include "ILMDVRSink.h"

Language	Syntax
C	HRESULT ILMDVRSink_GetTimedFragmentAlignment(pILMDVRSink, startOffset, endOffset, timeThreshold, pAlignedStartOffset, pAlignedEndOffset, pAlignedDuration)
C++	HRESULT GetTimedFragmentAlignment(startOffset, endOffset, timeThreshold, pAlignedStartOffset, pAlignedEndOffset, pAlignedDuration)

Parameters

ILMDVRSink *pILMDVRSink

A pointer to an ILMDVRSink interface.

double startOffset

(input) Specifies the byte offset at which to begin scanning for transport fragments.

double endOffset

(input) Specifies the byte offset at which to stop scanning for transport fragments.

double timeThreshold

(input) Specifies the minimum time (in seconds) of the fragments to find.

double *pAlignedStartOffset

(output) A pointer to a double variable, storing the offset of the start of the first transport fragment found.

double *pAlignedEndOffset

(output) A pointer to a double variable, storing the offset of the end of the last transport fragment.

double *pAlignedDuration

(output) A pointer to a double variable, storing the time (in seconds), of the transport fragments found.

Comments

It will only return the minimum number of fragments that meet or exceed the timeThreshold.

Use this function along with ILMDVRSink::CopyBufferToFile to save a completely intact MPEG transport fragment.

Set up the MPEG multiplexer used for recording to DVR by calling put_OutputType(Mpg2MxT_OutputType_HLS). Doing so guarantees that fragment boundaries start with synchronization frames. Specify the boundary time interval by calling put_ResyncInterval(intervalTime).

Returns

Value	Meaning
S_OK	The function was successful.
S_FALSE	No transport fragment found: pAlignedStartOffset and pAlignedEndOffset are set equal to startOffset, and indicate an empty search.