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  2. Chroma key - Wikipedia

    en.wikipedia.org/wiki/Chroma_key

    Sometimes a shadow can be used to create a visual effect. Areas of the blue screen or green screen with a shadow on them can be replaced with a darker version of the desired background video image, making it look like the person is casting a shadow on them. Any spill of the chroma key colour will make the result look unnatural.

  3. Windows DreamScene - Wikipedia

    en.wikipedia.org/wiki/Windows_DreamScene

    The software relies heavily on the Desktop Window Manager (or DWM, part of Windows Aero), and will not function without it. In Windows 7, DreamScene was replaced by a "Desktop Slideshow" feature, which produces slideshow background wallpapers. It does not support animated backgrounds or videos; however, it can still be enabled via third-party ...

  4. Comparison of video container formats - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_video...

    QDesign Music 1 and 2 Lossy: 1998 Proprietary: QuickTime [γ] No Yes No No No No No No ATRAC3: Lossy: 2000-09 Proprietary: Yes No No No No No No No No FLAC: Lossless: 2001-07 Open source Yes Yes No Yes Yes No No No No ALAC: Lossless: 2004-04 Open source Yes Yes Yes Yes Yes No No No No WMA Lossless: Lossless: 2003-01 Proprietary [97] ACM [d] No ...

  5. Portable media player - Wikipedia

    en.wikipedia.org/wiki/Portable_media_player

    The name MP4 player was a marketing term for inexpensive portable media players, usually from little-known or generic device manufacturers. [50] The name itself is a misnomer, since most MP4 players through 2007 were incompatible with the MPEG-4 Part 14 or the .mp4 container format. Instead, the term refers to their ability to play more file ...

  6. MP4 file format - Wikipedia

    en.wikipedia.org/wiki/MP4_file_format

    MPEG-4 Part 14, or MP4, is a digital multimedia container format most commonly used to store video and audio, but it can also be used to store other data such as subtitles and still images. Like most modern container formats, it allows streaming over the Internet. The only filename extension for MPEG-4 Part 14 files as defined by the ...

  7. Apple Lossless Audio Codec - Wikipedia

    en.wikipedia.org/wiki/Apple_Lossless_Audio_Codec

    According to Apple, audio files compressed with its lossless codec will use up "about half the storage space" that the uncompressed data would require. Testers using a selection of music have found that compressed files are about 40% to 60% the size of the originals depending on the kind of music, which is similar to other lossless formats. [3] [4]

  8. Screensaver - Wikipedia

    en.wikipedia.org/wiki/Screensaver

    A screensaver (or screen saver) is a computer program that blanks the display screen or fills it with moving images or patterns when the computer has been idle for a designated time. The original purpose of screensavers was to prevent phosphor burn-in on CRT or plasma computer monitors (hence the name). [ 1 ]

  9. Motion capture - Wikipedia

    en.wikipedia.org/wiki/Motion_capture

    A dancer wearing a suit used in an optical motion capture system Markers are placed at specific points on an actor's face during facial optical motion capture. Passive optical systems use markers coated with a retroreflective material to reflect light that is generated near the camera's lens. The camera's threshold can be adjusted so only the ...

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