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Video4Linux (V4L for short) is a collection of device drivers and an API for supporting realtime video capture on Linux systems. [1] It supports USB webcams, TV tuners, CSI cameras, and related devices, standardizing their output, so programmers can easily add video support to their applications.
The USB video device class (also USB video class or UVC) is a USB device class that describes devices capable of streaming video like webcams, digital camcorders, transcoders, analog video converters and still-image cameras.
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A DataPath VisionRGB-E2s expansion card with two frame grabbers. A frame grabber is an electronic device that captures (i.e., "grabs") individual, digital still frames from an analog video signal or a digital video stream.
One early card was a sandwich of two cards as early processors needed more logic to even get up to 15 frames per second. PCI capture cards offered 30 frames per second. These cards could also handle capturing VHS tapes etc. but VHS image quality was poor so many adopted new video cameras until eventually digital cameras surfaced.
It can also capture and encode in real-time from various hardware and software sources [35] such as a TV capture card. ffplay is a simple media player utilizing SDL and the FFmpeg libraries. ffprobe is a command-line tool to display media information (text, CSV , XML , JSON ), see also MediaInfo .
The ATI Twin Wonder TV tuner card. A TV tuner card is a kind of television tuner that allows television signals to be received by a computer.Most TV tuners also function as video capture cards, allowing them to record television programs onto a hard disk much like the digital video recorder (DVR) does.
USB3 Vision Logo. USB3 Vision [1] is an interface standard introduced in 2013 for industrial cameras. [2] It describes a specification on top of the USB standard, with a particular focus on supporting high-performance cameras based on USB 3.0. [3]
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