Common resolutions of laptops' built-in webcams are 720p (HD), and in lower-end laptops 480p. The Wii Remote contains an image sensor with a resolution of 1024×768 pixels. Many newer devices can produce video in multi- megapixel resolutions, and a few can run at high frame rates such as the PlayStation Eye, which can produce 320×240 video at 120 frames per second. Most consumer webcams are capable of providing VGA-resolution video at a frame rate of 30 frames per second. Image sensors can be CMOS or CCD, the former being dominant for low-cost cameras, but CCD cameras do not necessarily outperform CMOS-based cameras in the low-price range. Some of them, for example, those used as online traffic cameras, are expensive, rugged professional video cameras. The term "webcam" (a clipped compound) may also be used in its original sense of a video camera connected to the Web continuously for an indefinite time, rather than for a particular session, generally supplying a view for anyone who visits its web page over the Internet.
The lower resolution enables webcams to be relatively inexpensive compared to most video cameras, but the effect is adequate for video chat sessions. The maximum resolution of a webcam is also lower than most handheld video cameras, as higher resolutions would be reduced during transmission.
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As video streaming over the Internet requires much bandwidth, such streams usually use compressed formats. Webcam software enables users to record a video or stream the video on the Internet. Webcams can be used during a video chat session involving two or more people, with conversations that include live audio and video. Webcams are typically small cameras that sit on a desk, attach to a user's monitor, or are built into the hardware. Higher cost webcam (2017) with 1080p resolution and built-in stereo microphonesĪ webcam is a video camera that feeds or streams an image or video in real time to or through a computer network, such as the Internet.
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