Video creation 101
The video is an electronic method for recording, playback, copying, broadcasting, and display of visuals.
It was first developed for mechanical television that later was replaced by cathode ray tube. Flat panel displays later replaced the CRT systems. The display resolution, aspect ratio, refresh rate and color differentiates types of videos. Digital and analog variances exist and can be carried using magnetic tape and optical disc. Other means used were a radio broadcast, computer files, and network streaming.
In 1971, Sony began selling videocassette recorders. The decks and tapes were also part of Sony innovation. The use of new digital methods in video brought the digital video. These new versions allowed higher quality and were affordable compared to the previous products.
The introduction of DVD in 1997 and Blue-ray disc in 2006 led to increased demand for recording items. Then came the distracter, the computer technology. It allowed smartphones and personal computers to capture, store and edit digital videos.
The spread of innovation led to programmers creating the tapeless production. In 2015 the use of high dynamic range and different color dominated the market. With increased technology, people thought that the world had attained its most significant achievement. Soon came the video converging with digital film technology that has been used to date. Understanding how to create good video will allow you to market that to your potential clients with better reception. Notice the word good: It doesn't need to be Hollywood grade video to be effective. So let's dive into the characteristics a bit more for a deeper understanding.
Characteristics of video
Number of film per second
The number ranges from six to eight frames per second for old cameras. However, the rate has increased to 20 and more frames per second. The PLA, SECAM and NTSC standards of Europe, France and USA respectively specify 29.97 frames per second. The films can shoot at 24 frames per second.
Interlaced and progressive
A video can either be interlaced or progressive. Interlaced was introduced to reduce flicker and CRT displays without increasing frames per second. This would limit the image to narrow channel bandwidth.
Analog displays similarly reproduce each frame, doubling the frame rate in consideration of flicker. If image capture occurs one at a time rather than splitting the complete structure, your speed of motion is sufficient. It helps reproduction of image parts when viewed on an interlaced CRT display.
In the progressive system, the period of the update can scan lines in each frame consistently. When recording a native broadcast, the results are an optimal spatial resolution. When you display interlaced signal on a serial device, the resolution is degraded by the doubling line.
Only de-interlacing can optimize the view of the interlocked video signal from analog. However, this process does not produce video quality that is equivalent to progressive scan source.
The ratio describes the dimensions of famous video picture and screen elements. All video formats you come across are rectilinear meaning you can determine the ratio of height and width. The traditional television screen has 4:3 proportions while great defined TV has 16:9 aspect ratios.
The pixels on a computer monitor are square, but pixels used in the digital video do not have the shape. Therefore, a 720:480 pixels DV image displays have the 4:3 aspect ratios. If the pixels increase, then they display at an aspect ratio of 16:9.
Viewing videos on your smartphones have led to the evolution of Vertical Video. It has seen an increase in demand since 2015 as the format was taken to social media and platforms. For example, Grabyo also invented a horizontal 16:9 video ratio into the mobile dimension in 2015.
Color space and bits per pixel
Color model name illustrates the video color representation. YIQ was used in television by NTSC while SECAM television used YDBDR scheme. The number of colors a pixel can show depends directly on the number of bits per pixel.
Your eye is less sensitive to color as compared to brightness. This led to luminance data maintained while chrominance data averaged for a specific pixel in a block.
Metrics is measured with a format such as subjective and PSNR quality. You decide the sequence, a system to evaluate, test method to present and calculate the average number of HRC. For the digital era, you use the video compression method because it has a very high data rate but utilized on a group of pictures redundancy.
Video creation has seen a gradual development and change brought about by technological advancement over the years.