| Popis: |
In recent decades, linear communication has largely been replaced by visual depictions that contain not only moving images but also sound, text and other (visible or invisible) data. It is therefore not surprising that video has become so popular, especially among young people. So-called multimedia communication is transmitted via a variety of media. Since there are many ways and means of transmission, we wanted to investigate how the type of encoding that allows efficient file reduction affects the characteristics of the video format. For this purpose, we encoded selected videos using the three most common encoding mechanisms H.264/AVC, MPEG-2 and H.265/HEVC at high and medium bitrate. The newly created video files were then uploaded to three popular platforms – Instagram, YouTube and Gmail. Changes in file size, colour gamut, frame and bitrate, resolution and other visually recognizable details are presented in the paper. |
