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Video4Linux
Video4Linux (V4L for short) is a collection of device drivers and an API for supporting realtime video capture on Linux systems. It supports USB webcams, TV tuners, CSI cameras, and related devices, standardizing their output, so programmers can easily add video support to their applications. Video4Linux is responsible for creating V4L2 device nodes aka a device file (/dev/videoX, /dev/vbiX and /dev/radioX) and tracking data from these nodes. The device node creation is handled by V4L device drivers using the video_device struct (v4l2-dev.h) and it can either be allocated dynamically or embedded in another larger struct. Video4Linux was named after Video for Windows (which is sometimes abbreviated "V4W"), but is not technically related to it. While Video4Linux is only available on Linux, there is a compatibility layer available for FreeBSD called Video4BSD. This provides a way for many programs that depend on V4L to also compile and run on the FreeBSD operating system. Histor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Linux
Linux ( ) is a family of open source Unix-like operating systems based on the Linux kernel, an kernel (operating system), operating system kernel first released on September 17, 1991, by Linus Torvalds. Linux is typically package manager, packaged as a Linux distribution (distro), which includes the kernel and supporting system software and library (computing), libraries—most of which are provided by third parties—to create a complete operating system, designed as a clone of Unix and released under the copyleft GPL license. List of Linux distributions, Thousands of Linux distributions exist, many based directly or indirectly on other distributions; popular Linux distributions include Debian, Fedora Linux, Linux Mint, Arch Linux, and Ubuntu, while commercial distributions include Red Hat Enterprise Linux, SUSE Linux Enterprise, and ChromeOS. Linux distributions are frequently used in server platforms. Many Linux distributions use the word "Linux" in their name, but the Free ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Libav
FFmpeg is a free and open-source software project consisting of a suite of libraries and programs for handling video, audio, and other multimedia files and streams. At its core is the command-line ffmpeg tool itself, designed for processing video and audio files. It is widely used for format transcoding, basic editing (trimming and concatenation), video scaling, video post-production effects, and standards compliance (SMPTE, ITU). FFmpeg also includes other tools: ffplay, a simple media player, and ffprobe, a command-line tool to display media information. Among included libraries are libavcodec, an audio/video codec library used by many commercial and free software products, libavformat (Lavf), an audio/video container mux and demux library, and libavfilter, a library for enhancing and editing filters through a GStreamer-like filtergraph. FFmpeg is part of the workflow of many other software projects, and its libraries are a core part of software media players such as VLC, an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
FFmpeg
FFmpeg is a free and open-source software project consisting of a suite of libraries and programs for handling video, audio, and other multimedia files and streams. At its core is the command-line ffmpeg tool itself, designed for processing video and audio files. It is widely used for format transcoding, basic editing (trimming and concatenation), video scaling, video post-production effects, and standards compliance ( SMPTE, ITU). FFmpeg also includes other tools: ffplay, a simple media player, and ffprobe, a command-line tool to display media information. Among included libraries are libavcodec, an audio/video codec library used by many commercial and free software products, libavformat (Lavf), an audio/video container mux and demux library, and libavfilter, a library for enhancing and editing filters through a GStreamer-like filtergraph. FFmpeg is part of the workflow of many other software projects, and its libraries are a core part of software media players such as V ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Guvcview
Guvcview (GTK+ UVC Viewer) is a webcam application, i.e. software to handle UVC streams, for the Linux desktop, started by Paulo Assis in 2008. The application is written in C and is free and open-source software released under GPL-2.0-or-later. Guvcview is compatible with all V4L2 camera devices, using the Linux UVC driver and based on ''luvcview'' for video rendering. Audio support employs the PortAudio open-source library. The application's user interface is built using GTK+ and is designed to be simple and easy to use. The application has been noted as using fewer resources than other webcam applications, such as the GNOME standard webcam application, Cheese, and is an alternative to other webcam applications, including Apple Photo Booth and KDE Kamoso. Features Guvcview uses a two-window interface in normal use. One window displays the camera image to be recorded and the other displays the settings and controls, as well as menus. Through the Linux UVC driver, Guvc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Linux Kernel
The Linux kernel is a Free and open-source software, free and open source Unix-like kernel (operating system), kernel that is used in many computer systems worldwide. The kernel was created by Linus Torvalds in 1991 and was soon adopted as the kernel for the GNU operating system (OS) which was created to be a free software, free replacement for Unix. Since the late 1990s, it has been included in many Linux distributions, operating system distributions, many of which are called Linux. One such Linux kernel operating system is Android (operating system), Android which is used in many mobile and embedded devices. Most of the kernel code is written in C (programming language), C as supported by the GNU compiler collection (GCC) which has extensions beyond standard C. The code also contains assembly language, assembly code for architecture-specific logic such as optimizing memory use and task execution. The kernel has a Modular programming, modular design such that modules can be inte ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cheese (software)
Cheese is the former default webcam application for the GNOME desktop, i.e. an application to handle UVC streams over Video4Linux. It was developed as a Google Summer of Code 2007 project by Daniel G. Siegel. It uses GStreamer to apply effects to photos and videos. It can export to Flickr and is integrated into GNOME. It was officially added to GNOME in version 2.22. Overview The webcam A webcam is a video camera which is designed to record or stream to a computer or computer network. They are primarily used in Videotelephony, video telephony, live streaming and social media, and Closed-circuit television, security. Webcams can b ... application started off as a way to take photos with a webcam, which could then easily be shared. It has gained features and usage and can now be used in many ways that were not possible at its first release. Cheese can record photos as well as video, and can use a timer before shooting as well as taking pictures in burst mode. Version 2.28 broug ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Media Resource Locator
A media resource locator (MRL) is a URI used to uniquely identify and locate a multimedia resource. It is used by the VideoLAN and Xine media players, as well as the Java Media Framework (JMF) API An application programming interface (API) is a connection between computers or between computer programs. It is a type of software interface, offering a service to other pieces of software. A document or standard that describes how to build .... VLC, for example, supports the following MRLs:. * dvd://[][@][@[][,[][,] * vcd://[][@[ * http://[:]/[] * rtsp://[:]/ Several media players also support Video4Linux as v4l:// and v4l2://. References Media players {{Web-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
LinuxTV
The LinuxTV project is an informal group of volunteers who develop software regarding digital television for the Linux kernel-based operating systems. The community develops and maintains the Digital Video Broadcasting (DVB) driver subsystem which is part of the Linux kernel since version 2.6.x. The Linux kernel and the LinuxTV CVS include a fair number of drivers for commonly available PCI cards and USB devices, but the DVB subsystem core is also targeted towards set-top boxes which run some (embedded) Linux. The LinuxTV project was originally initiated by the Berlin, Germany based company Convergence Integrated Media GmbH with the goal to distribute free and Open-source software, open source software for the production, distribution and reception of digital television. In 1998, the Convergence founders claimed that "Only the access to the source code of our future television sets will guarantee the independence of content and technology". After some financial troubles, in 2002 Co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
C (programming Language)
C (''pronounced'' '' – like the letter c'') is a general-purpose programming language. It was created in the 1970s by Dennis Ritchie and remains very widely used and influential. By design, C's features cleanly reflect the capabilities of the targeted Central processing unit, CPUs. It has found lasting use in operating systems code (especially in Kernel (operating system), kernels), device drivers, and protocol stacks, but its use in application software has been decreasing. C is commonly used on computer architectures that range from the largest supercomputers to the smallest microcontrollers and embedded systems. A successor to the programming language B (programming language), B, C was originally developed at Bell Labs by Ritchie between 1972 and 1973 to construct utilities running on Unix. It was applied to re-implementing the kernel of the Unix operating system. During the 1980s, C gradually gained popularity. It has become one of the most widely used programming langu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
GStreamer
GStreamer is a Pipeline (computing), pipeline-based multimedia framework that links together a wide variety of media processing systems to complete complex workflows. For instance, GStreamer can be used to build a system that reads files in one format, processes them, and exports them in another. The formats and processes can be changed in a plug and play fashion. GStreamer supports a wide variety of media-handling components, including simple Digital audio, audio playback, audio and video playback, Sound recording and reproduction, recording, Streaming media, streaming and editing. The pipeline design serves as a base to create many types of multimedia applications such as Video editing, video editors, Transcoding, transcoders, streaming media broadcasters and Media player (application software), media players. It is designed to work on a variety of operating systems, e.g. the Berkeley Software Distribution, BSDs, OpenSolaris, Linux, Android (operating system), Android, macOS, i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kopete
Kopete was a multi-protocol, free software instant messaging client released as part of the KDE Software Compilation. Although it can run in numerous environments, it was designed for and integrates with the KDE Plasma Workspaces. Kopete was started because ICQ blocked Licq from their network in 2001. According to the original author, Duncan Mac-Vicar Prett, the name comes from the Chilean Spanish word ''copete'', meaning "a drink with your friends". Kopete has been nominated for multiple awards. (2nd place, Favorite Instant Messaging Client) (Best Communications Software, Runner Up) The designated successor is KDE Telepathy from the KDE RTCC Initiative. Protocols Kopete allows users to connect to the following protocols: MSNP (Microsoft Messenger service, commonly known as ''MSN'', ''.NET'', or ''Live'') was also supported until the protocol was discontinued by Microsoft. Features Plugins By default, Kopete supports the following plugins (not all of which are current ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kdetv
The KDE Gear is a set of applications and supporting libraries that are developed by the KDE community, primarily used on Linux-based operating systems but mostly multiplatform, and released on a common release schedule. The bundle is composed of over 200 applications. Examples of prominent applications in the bundle include the file manager Dolphin, document viewer Okular, text editor Kate, archiving tool Ark and terminal emulator Konsole. Previously the KDE Applications Bundle was part of the KDE Software Compilation. Extragear Software that is not part of the official KDE Applications bundle can be found in the "Extragear" section. They release on their own schedule and feature their own versioning numbers. There are many standalone applications like Krita or Amarok that are mostly designed to be portable between operating systems and deployable independent of a particular workspace or desktop environment. Some brands consist of multiple applications, such as Calligr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
