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

The DirectShow component responsible for playing the video. Some renderers might have useful settings you can adjust if you have problems playing the video.

The audio device that will play the sound. This is usually your sound card. Some computers have more than one sound playback device. You choose which sound playback device will play the sound by selecting the corresponding audio renderer.

DV stands for Digital Video and has been defined in "Specification of Consumer-use Digital VCRs" (aka the Blue Book).

ltmmCapture_Object Constants

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typedef enum _ltmmCapture_Object
{
   ltmmCapture_Object_FilterGraph,
   ltmmCapture_Object_VideoCaptureFilter,
   ltmmCapture_Object_AudioCaptureFilter,
   ltmmCapture_Object_VideoCapturePin,
   ltmmCapture_Object_AudioCapturePin,
   ltmmCapture_Object_VideoPreviewPin,
   ltmmCapture_Object_AudioPreviewPin,
   ltmmCapture_Object_TVTuner,
   ltmmCapture_Object_TVAudio,
   ltmmCapture_Object_VideoCrossbar,
   ltmmCapture_Object_AudioCrossbar,
   ltmmCapture_Object_VideoCompressor,
   ltmmCapture_Object_AudioCompressor,
   ltmmCapture_Object_TargetFilter,
   ltmmCapture_Object_VideoRenderer,
   ltmmCapture_Object_AudioRenderer,
   ltmmCapture_Object_VideoDecompressor,
   ltmmCapture_Object_AudioDecompressor,
   ltmmCapture_Object_Splitter,
   ltmmCapture_Object_VideoCompressorOutputPin,
   ltmmCapture_Object_AudioCompressorOutputPin,
   ltmmCapture_Object_Sink,
   ltmmCapture_Object_TargetAVMux,
   ltmmCapture_Object_TargetVideoCompressor,
   ltmmCapture_Object_TargetAudioCompressor,
   ltmmCapture_Object_SelAudioProcessor = 0x100,
   ltmmCapture_Object_SelVideoProcessor = 0x200,
   ltmmCapture_Object_PrevAudioProcessor= 0x300,
   ltmmCapture_Object_PrevVideoProcessor= 0x400,
} ltmmCapture_Object;

The ltmmCapture_Object constants define objects that can be obtained through the GetSubObject method .

Constant	Description
ltmmCapture_Object_FilterGraph	Specifies the filter graph.
ltmmCapture_Object_VideoCaptureFilter	Specifies the video device filter.
ltmmCapture_Object_AudioCaptureFilter	Specifies the audio device filter.
ltmmCapture_Object_VideoCapturePin	Specifies the video capture pin.
ltmmCapture_Object_AudioCapturePin	Specifies the audio capture pin.
ltmmCapture_Object_VideoPreviewPin	Specifies the video preview pin.
ltmmCapture_Object_AudioPreviewPin	Specifies the audio preview pin.
ltmmCapture_Object_TVTuner	Specifies the TV tuner.
ltmmCapture_Object_TVAudio	Specifies the TV audio controls.
ltmmCapture_Object_VideoCrossbar	Specifies the video crossbar.
ltmmCapture_Object_AudioCrossbar	Specifies the audio or secondary crossbar.
ltmmCapture_Object_VideoCompressor	Specifies the currently selected video compressor .
ltmmCapture_Object_AudioCompressor	Specifies the currently selected audio compressor.
ltmmCapture_Object_TargetFilter	Specifies the target filter.
	NOTE: If the target filter is multiplexer or sink, use the IltmmTargetFormat::GetCacheObject function instead of IltmmCapture::GetSubObject. The target filters are not added to the capture graph until the capture graph being built using IltmmCapture::ReadyCapture or IltmmCapture::StartCapture. But at this point, the graph is in running state. Some multiplexers or sinks might not be able to change some settings in running mode. By default, when the capture is stopped, the multiplexer and sink are destroyed so the only way to change their settings in stopped mode is to create them before the capture starts. This can be done by first calling function IltmmTargetFormat::put_UseFilterCache with true and then retrieving the objects using IltmmTargetFormat::GetCacheObject.
ltmmCapture_Object_VideoRenderer	Specifies the preview video renderer .
ltmmCapture_Object_AudioRenderer	Specifies the preview audio renderer .
ltmmCapture_Object_VideoDecompressor	Specifies the video decompressor. This is usually present when capturing from compressed formats, like DV camcorders, and recompressing.
ltmmCapture_Object_AudioDecompressor	Specifies the audio decompressor.
ltmmCapture_Object_Splitter	Specifies the splitter. This is usually present when capturing interleaved video, like DV video, and recompressing.
ltmmCapture_Object_VideoCompressorOutputPin	Specifies the video compressor output pin.
ltmmCapture_Object_AudioCompressorOutputPin	Specifies the audio compressor output pin.
ltmmCapture_Object_Sink	Specifies the sink (writer) object. If the target format type is ltmmCapture_TargetFormat_DVD, this specifies the DVD writer object.
ltmmCapture_Object_TargetAVMux	Specifies the multiplexer for current target format.
ltmmCapture_Object_TargetVideoCompressor	Specifies implicit video compressor for the current target format. If the target format type is ltmmCapture_TargetFormat_FLV_H264, this specifies the H264 encoder.
ltmmCapture_Object_TargetAudioCompressor	Specifies implicit audio compressor for the current target format. If the target format type is ltmmCapture_TargetFormat_FLV_H264, this specifies the AAC encoder.
ltmmCapture_Object_SelAudioProcessor	Specifies the first selected audio processor. Additional processors may be specified by adding the processor's collection index to this constant. A maximum of 256 processors may be specified.
ltmmCapture_Object_SelVideoProcessor	Specifies the first selected video processor. Additional processors may be specified by adding the processor's collection index to this constant. A maximum of 256 processors may be specified.
ltmmCapture_Object_PrevAudioProcessor	Specifies the first preview audio processor. Additional processors may be specified by adding the processor's collection index to this constant. A maximum of 256 processors may be specified. Preview processors affect only the preview stream, not any captured video.
ltmmCapture_Object_PrevVideoProcessor	Specifies the first preview video processor. Additional processors may be specified by adding the processor's collection index to this constant. A maximum of 256 processors may be specified. Preview processors affect only the preview stream, not any captured video.