Copyright © 2001-2019 MultiMedia Soft

TagsReader.MP4_PictureFrameBitmapGet method

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Remarks

 

Obtains the memory bitmap (HBITMAP) representation of the picture stored inside a MP4 picture frame.

 

For further details about methods related to tags reading refer to the TagsReader object.

For details about the reading of tags see the How to read TAG information in sound files tutorial.

 

 

Syntax

 

[Visual Basic]

control.TagsReader.MP4_PictureFrameBitmapGet (

nIndex as Integer,

hBitmap as OLE_HANDLE,

nOriginalWidth as Long,

nOriginalHeight as Long,

nResizeWidth as Long,

nResizeHeight as Long

) as enumErrorCodes


 

[C++]

short control.TagsReader.MP4_PictureFrameBitmapGet (

short nIndex,

OLE_HANDLE *hBitmap,

long *nOriginalWidth,

long *nOriginalHeight,

long nResizeWidth,

long nResizeHeight

);


 

Parameter

Description

 

 

nIndex

Zero-based index of the picture frame. The total number of picture frames available inside the MP4 tag can be obtained through a call to the TagsReader.MP4_PictureFrameCountGet method.

hBitmap

Reference that, on return from the method call, will contain the HBITMAP of the picture.

nOriginalWidth

Reference that, on return from the method call, will contain the original width, expressed in pixels, of the picture.

nOriginalHeight

Reference that, on return from the method call, will contain the original height, expressed in pixels, of the picture.

nResizeWidth

Value containing the width, expressed in pixels, for horizontally resizing the picture before returning the HBITMAP; this parameter is ignored if set to 0 in which case the picture represented by the HBITMAP handle will have the same width returned inside the nOriginalWidth parameter.

nResizeHeight

Value containing the height, expressed in pixels, for vertically resizing the picture before returning the HBITMAP; this parameter is ignored if set to 0 in which case the picture represented by the HBITMAP handle will have the same height returned inside the nOriginalHeight parameter.

 

 

Return value

 

Value

Meaning

 

 

Negative value

An error occurred (see the LastError property for further error details)

enumErrorCodes.NOERROR (0)

The method call was successful.