IltmmConvert::put_SelectionStartModifier

#include "ltmm.h"

C Syntax

HRESULT IltmmConvert_put_SelectionStartModifier(pConvert, newVal)

C++ Syntax

HRESULT put_SelectionStartModifier(newVal)

IltmmConvert *pConvert;

pointer to an interface

ltmmSelectionModifier newVal;

modifier value

Sets a value specifying how the selection start value will be modified when set.

Parameter

Description

pConvert

Pointer to an IltmmConvert interface.

newVal

New selection start modifier.

Value

Meaning

ltmmSelectionModifier_None

No automatic adjustment

ltmmSelectionModifier_NearestKeyFrame

Adjust the time either forward or backward to the nearest key frame

ltmmSelectionModifier_NextKeyFrame

Adjust the time forward to the next key frame

ltmmSelectionModifier_PreviousKeyFrame

Adjust the time backward to the previous key frame

 

Returns

S_OK

The function was successful.

<> S_OK

An error occurred. Refer to the Error Codes or the HRESULT error codes in the DirectShow documentation.

Comments

The default value is ltmmSelectionModifier_None.

When this property is set to any other valid ltmmSelectionModifier value, the value passed to IltmmConvert::put_SelectionStart will be automatically adjusted based on the value of this property.

The SelectionStartModifier and SelectionEndModifer properties allow you to specify whether LEADTOOLS should automatically adjust the selection points to be on a key frame (key frame is a synonym to a sync point). Moving the selection point to a key frame allows for faster compression and is better for concatenation applications, since you can concatenate video clips if the second section starts with a key frame.

Automatic adjustment of the selection points is supported only for MPEG-2 Program and MPEG-2 Transport files.

Required DLLs and Libraries

LTMM

For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application.

Platforms

Win32, x64

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