Internet pornography. Internet pornography formats Image files Pornographic images may be either scanned into the computer from photographs or magazines, produced with a digital camera or a frame from a video before being uploading onto a pornographic website. The JPEG format is one of the most common formats for these images. Another format is GIF which may provide an animated image where the people in the picture move. It can last for only a second or two up to a few minutes and then reruns (repeats) indefinitely. If the position of the objects in the last frame is about the same as the first frame, there is the illusion of continuous action. Video files and streaming video Pornographic video clips may be distributed in a number of formats, including MPEG, WMV, and QuickTime. More recently, VCD and DVD image files allow the distribution of whole VCDs and DVDs. Many commercial porn sites exist that allow one to view pornographic streaming video. As of 2020, some internet pornography sites have begun offering 5K resolution content, while 1080p and 4K resolution are still more common. Since mid-2006, advertising-supported free pornographic video sharing websites based on the YouTube format have appeared. Referred to as Porn 2.0, these sites generally use Flash technology to distribute videos that were uploaded by users; these include user-generated content as well as scenes from commercial porn movies and advertising clips from pornographic websites. Webcams Another format of adult content that emerged with the advent of the internet is live webcams. Webcam content can generally be divided into two categories: group shows offered to members of an adult paysite, and one-on-one private sessions usually sold on a pay-per-view basis. Server-based webcam sex shows spur unique international economics: adult models in various countries perform live webcam shows and chat for clients in affluent countries. This kind of activity is sometimes mediated by companies that will set up websites and manage finances. They may maintain "office" space for the models to perform from, or they provide the interface for models to work at home, with their own computer with webcam. As of 2020, most so-called cam hosts stream directly from their home, due to the fast internet lines and cheap HD webcams, that are available at low-cost. The models get paid via tips or by selling exclusive content to their viewers through live cam sites, which can reach more than 20,000