Also known as an encoder , this is a module or algorithm to compress data. Playing that data back requires a decompressor , or decoder .

Also known as compressor, this is a module or algorithm to compress data. Playing that data back requires a decompressor, or decoder.

Also known as a decoder, this is a module or algorithm to decompress data.

Also known as a decompressor, this is a module or algorithm to decompress data.

The format to be used for the converted file. This includes the file format, any special settings used by that format, and which audio and/or video codec is to be used for the conversion, and any special settings used by the codecs.

A COmpressor combined with a DECompressor, or encoder and a decoder, which allows you to both compress and decompress that same data.

IltmmTargetFormat::IsValidCompressor

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#include "ltmm.h"

C Syntax	HRESULT IltmmTargetFormat_IsValidCompressor(Format, Name, pVal)
C++ Syntax	HRESULT IsValidCompressor(Name, pVal)

IltmmTargetFormat *Format;	/* pointer to an interface */
BSTR Name;	/* string */
long *pVal;	/* pointer to a variable */

Retrieves a value that indicates if the specified compressor is valid for the currently selected target format in the capture or convert parent object.

Parameter	Description
pTargetFormat	Pointer to an IltmmTargetFormat interface.
Name	String that contains the name of the compressor for which to test the validity.
pVal	Pointer to a variable to be updated with a value that indicates if the specified compressor is valid for the currently selected target format in the capture or convert parent object. For a list of possible values, refer to ltmmTargetFormat_Compressor constants.

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.

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

Elements:	IltmmTargetFormat::get_RecommendedAudioCompressor, IltmmTargetFormat::get_RecommendedVideoCompressor
Topics:	Multimedia Function Group