I-Pictures (Intra-coded picture) : these are easiest to think of as a complete picture and are slightly compressed like a JPEG photo file is compressed.In MPEG-2 streams there are three types of pictures : The data is replaced by a reference to an earlier or later frame. They rely on a system of deleting data that is unnecessarily repeated in frame after frame of the videos. The term “compressing” is misleading, because these video file formats are made in a similar fashion and achieve their very high compression rates by throwing away information. The highly compressed video file formats like MPEG-2 or MPEG-4 were exclusively designed for playback or distribution… not for editing. H.264 is used in Blu-ray Discs, cable television services, real-time videoconferencing, mobile devices, … The standard defines 17 sets of capabilities, which are referred to as profiles, targeting specific classes of applications. H.264/MPEG-4 Part 10 or AVC (Advanced Video Coding) is is a block-oriented motion-compensation-based codec standard developed by the ITU-T Video Coding Experts Group (VCEG) together with the ISO/IEC Moving Picture Experts Group (MPEG). This process is called smart editing and is particularly difficult if the video is encoded with H264. ![]() To edit a video, you need to cut & join numerous clips.
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