| # | rid | key | def
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| 1 | |directshow:alpha| | |alpha| | |In computer graphics | the measure of a pixel's opacity. A pixel with the maximum alpha value is opaque | one with a value of zero is transparent | and one with an intermediate value is translucent.| |
| 2 | |directshow:bit_block_transfer__bitblt_| | |bit block transfer (bitblt)| | |In graphics display and animation | a programming technique that manipulates blocks of bits in memory that represent the color and other attributes of a rectangular block of pixels forming a screen image.| |
| 3 | |directshow:bitblt| | |bitblt| | |See definition for: bit block transfer (bitblt)| |
| 4 | |directshow:bob| | |bob| | |To display interlaced video fields on a progressive monitor. In bob mode | one field is displayed at a time | with the even lines alternating with the odd lines. The lines are stretched by a factor of two | to fit the entire display area.| |
| 5 | |directshow:codec| | |codec| | |An abbreviation for compressor-decompressor. It is software or hardware used to compress and decompress digital media.| |
| 6 | |directshow:color_key| | |color key| | |A color used for transparent or translucent effects. An overlay surface is displayed in the region of the primary surface that contains the color key. In video production | color keys are used to combine two video signals. Also called a chroma key.| |
| 7 | |directshow:composition| | |composition| | |A collection of tracks and (optionally) other compositions. At rendering time | the sources in a composition are composited into a single image.| |
| 8 | |directshow:compression_filter| | |compression filter| | |A specialized type of transform filter that accepts data from an upstream filter | uses a compression scheme to transform the data | and passes the compressed data to the downstream filter.| |
| 9 | |directshow:crossover_link| | |crossover link| | |A URL sent as line-21 data in an analog TV signal. Also called interactive TV (ITV) link.| |
| 10 | |directshow:debug_build| | |debug build| | |The largest and slowest type of build | but one that provides better facilities for debugging new code and tracking problems.| |
| 11 | |directshow:debug_level| | |debug level| | |A DWORD value indicating the relative importance of a debug output | where zero is the most important level.| |
| 12 | |directshow:delta_frame| | |delta frame| | |A frame that contains only the changes from the previous frame. In contrast | a key frame contains all the data necessary to construct that frame.| |
| 13 | |directshow:dib_sequence| | |DIB sequence| | |A series of device-independent bitmap (DIB) images rendered in a sequence as video frames.| |
| 14 | |directshow:downsample| | |downsample| | |To decrease the number of audio samples or pixels | by applying an operation such as averaging.| |
| 15 | |directshow:downstream| | |downstream| | |In a filter graph | the direction in which digital media samples travel.| |
| 16 | |directshow:field| | |field| | |A portion of an interlaced video frame. With interlaced video | the scan lines of even-numbered fields fall spatially halfway between the scan lines of odd-numbered fields.| |
| 17 | |directshow:gamma| | |gamma| | |The curve in the function that maps changes in voltage to changes in brightness on a phosphor screen. The change in voltage needed to produce a specified change in brightness is not constant across voltage levels.| |
| 18 | |directshow:group| | |group| | |A top-level collection of compositions and tracks | all representing the same multimedia type. Each group produces a separate stream in the rendered project.| |
| 19 | |directshow:hue| | |hue| | |Color produced by visible light. The common color terms such as green | red | or orange refer to hue.| |
| 20 | |directshow:intelligent_connect| | |intelligent connect| | |In DirectShow | an algorithm used by the filter graph manager to build graphs and connect filters. If an output pin is specified | the filter graph manager renders the data from that pin by using default renderers. If two filters are specified | the filter graph manager attempts to connect them. It will insert intermediate filters if necessary.| |
| 21 | |directshow:interlace| | |interlace| | |To display video by using a half-resolution image known as a field. Interlaced video uses two video fields to make a single frame of video. Each field of video contains alternating lines of an image: field 1 displays the odd numbered lines and field 2 displays the even numbered lines. Interlacing saves bandwidth when the video is transmitted as a television broadcast or on cable.| |
| 22 | |directshow:interleaving| | |interleaving| | |The arrangement of video frames and audio samples in a file | such that video data alternates with audio data at regular intervals.| |
| 23 | |directshow:kernel_mode| | |kernel mode| | |The operational state of a processor that enables full | unprotected access to a system. A driver or thread running in kernel mode has access to system memory and hardware.| |
| 24 | |directshow:key_frame| | |key frame| | |A frame of video data that contains all the data necessary to construct that frame. In contrast | delta frames contain data relating to changes from the last key frame | and do not contain enough information to construct a complete frame.| |
| 25 | |directshow:latency| | |latency| | |The amount of time it takes a filter to process a sample.| |
| 26 | |directshow:letterbox| | |letterbox| | |A video display format in which the video is sized as large as possible inside the display window | without any cropping or stretching.| |
| 27 | |directshow:locked_audio| | |locked audio| | |A digital video format in which the number of audio samples in a frame follows a specific distribution. For example | in NTSC 48-kHz locked audio | frame 1 contains 1 | 600 samples | and frames 2 through 5 each contain 1 | 602 samples. In contrast | in unlocked audio | the number of samples can vary | although the average must equal the stated sample rate.| |
| 28 | |directshow:lookahead| | |lookahead| | |To use data from later in the stream to process the current data. For example | the next key frame is used to calculate a delta frame.| |
| 29 | |directshow:medium| | |medium| | |A structure that identifies a hardware data path between two devices on the host system. They can be devices on the same card | such as a crossbar and a tuner on a TV card; devices on separate cards; or external devices. Kernel-mode filters based on the Windows« Driver Model can use mediums instead of media types to determine pin connections.| |
| 30 | |directshow:multiplexer__mux_| | |multiplexer (MUX)| | |A filter that combines multiple input streams into one output stream.| |
| 31 | |directshow:mux| | |MUX| | |See definition for: multiplexer (MUX)| |
| 32 | |directshow:national_television_standards_committee__ntsc_| | |National Television Standards Committee (NTSC)| | |A standards body that is responsible for setting television and video standards in the United States. The NTSC standard for television defines a composite video signal with a refresh rate of 60 half-frames (interlaced) per second. Each frame contains 525 lines and can contain 16 million different colors. Formerly the National Television Systems Committee.| |
| 33 | |directshow:ntsc| | |NTSC| | |See definition for: National Television Standards Committee (NTSC)| |
| 34 | |directshow:pal| | |PAL| | |See definition for: Phase Alternating Line (PAL)| |
| 35 | |directshow:pan_scan| | |pan-scan| | |A DVD display format in which a 16x9 video is cropped for display in a 4x3 window | by using parameters defined by the video author.| |
| 36 | |directshow:phase_alternating_line__pal_| | |Phase Alternating Line (PAL)| | |The dominant television standard in Europe. Whereas the NTSC | the U.S. standard | delivers 525 lines of resolution at 60 half-frames per second | PAL delivers 625 lines at 50 half-frames per second.| |
| 37 | |directshow:preroll| | |preroll| | |To queue data before the desired playback time or position.| |
| 38 | |directshow:primary_surface| | |primary surface| | |The area in computer memory containing the image being displayed on the screen. In DirectX | the primary surface is represented by the primary DirectDrawSurface object.| |
| 39 | |directshow:quality_control| | |quality control| | |In DirectShow | a mechanism for adjusting the rate of data flow in response to run-time conditions.| |
| 40 | |directshow:reference_clock| | |reference clock| | |A clock that provides a common reference time with which filters can be synchronized.| |
| 41 | |directshow:reference_time| | |reference time| | |An absolute time established by a reference clock in the filter graph.| |
| 42 | |directshow:smart_recompression| | |smart recompression| | |Decompressing and recompressing a source file only when its format does not match the output format.| |
| 43 | |directshow:stream_time| | |stream time| | |The time since the filter graph was last started. By definition | stream time equals reference time minus the previous start time. Stream time is relevant only in a running filter graph.| |
| 44 | |directshow:subtype| | |subtype| | |A GUID value that describes the specific format of multimedia data for a data stream. Also called minor type.| |
| 45 | |directshow:synchronization_point| | |synchronization point| | |A media sample that can be decoded without requiring the decompressor to examine any other samples. One example is a key frame.| |
| 46 | |directshow:tearing| | |tearing| | |A visual rip effect that occurs when one displayed video frame contains parts of two different source video frames. It is usually caused by improper synchronization between video rendering and the graphics display.| |
| 47 | |directshow:time_stamp| | |time stamp| | |The time on a media sample indicating when it was recorded and when it should be scheduled for playback. Time stamps are measured in 100-nanosecond units.| |
| 48 | |directshow:timecode| | |timecode| | |A series of digital frame address values | flags | and additional data applied to a video or audio stream; defined in the ANSI/SMPTE 12-1986 standard. It provides a machine-readable address for video and audio. Also called SMPTE timecode.| |
| 49 | |directshow:timeline| | |timeline| | |In a DirectShow Editing Services video-editing project | the root node that contains all the other objects in the project.| |
| 50 | |directshow:track| | |track| | |A collection of nonoverlapping sources with a common media type (audio or video).| |
| 51 | |directshow:transform_filter| | |transform filter| | |A filter that receives data from an upstream filter | processes it | and then delivers it to the next filter in the filter graph.| |
| 52 | |directshow:transform_inplace_filter| | |transform-inplace filter| | |A filter that can modify data without copying the data to a new buffer.| |
| 53 | |directshow:transport| | |transport| | |Of a filter | the mechanism for moving media samples across pins. Of an external device | such as a DV camcorder | the mechanism for channeling data from the device to a computer | or from the computer to the device.| |
| 54 | |directshow:upsample| | |upsample| | |To increase the number of audio samples or pixels | through a process such as interpolation.| |
| 55 | |directshow:upstream| | |upstream| | |In a filter graph | the direction opposite to the flow of digital media samples. For example | seek requests and quality control messages travel upstream.| |
| 56 | |directshow:virtual_track| | |virtual track| | |Any object that can be contained in a composition.| |
| 57 | |directshow:weave| | |weave| | |To display interlaced video fields on a progressive monitor. In weave mode | two successive fields are displayed at a time. The horizontal scan lines alternate between the two fields.|
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