In fact, through all these extensions we can know what kind of content they are. Is it possible to understand by looking at the extension whether it is audio or video, is it made for movie or CD? Do we just understand the content? By looking at the extension we can find out what kind of codecs have been used in all this content!
What is the codecs thing?
Codex is a kind of compression process that reduces the size of your audio or video content. Otherwise even a small amount of audio or video can scatter the entire hard disk space! These codes are very effective in reducing the size. It can be said that a lot of the same kind of things are arranged in a bundle as it takes up less space, the same happens in this case!Codecs h.264
Many types of codecs exist. The most well-known of these codecs is h.264. It very efficiently compresses and depresses the size of the video while keeping the image quality intact!Each frame of the video we see on the screen consists of a number of tiny pixels. h.264 stores numerous pixels of each frame separately in 256 blocks. Each of these blocks changes its position to match the view of its previous and subsequent frames. If a certain part is the same in more than one frame, then those common pixels are saved from only one frame and those common pixels are omitted from the rest of the frames by special algorithm. This is called residual. These saved parts are converted into 0 and 1 binary digits as 16 checkerboard patterns. As a result, the size of the video is significantly reduced.
The quality of the video depends on the quality of this residual. Video and audio quality changes as the value of residual increases or decreases.
If you find it difficult to understand, think differently. If you put the same image in JPEG format, you can reduce its size as you wish, but keep in mind that size reduction means pixel comma, so the image quality will gradually decrease!
If you understand the above example, then you must have understood now why the quality of video in 3gp format looks bad (size but small), on the other hand, the quality increases as the size of video in mp4 format increases.
Codecs h.265
Another new codecs is h.265 which is more advanced than the previous h.264. It is also called h-e-b-c. This together creates a block with 4096 pixels. As a result video and audio quality is more clear. As a result of the special algorithms of these codecs, the quality of the video has improved on the one hand and decreased in size on the other. As a result, it is now possible to stream 8k quality videos directly online!Note that companies are required to pay royalties for using h.264 and h.265 codecs. With this in mind, Google has released two royalty free codecs called VP8 and VP9 for free research. There is disagreement as to which of these is the best.
Note that Netflix uses free codecs!
Let me summarize some of the most familiar formats-
- If you upload 720 pixel or 1080 pixel video / live streaming on YouTube, it looks quality. Because mp4 format is more used in it.
- Blu-ray format is used for CD discs.
- Mpeg-2 and blue-ray formats are used for bloodcast TV and DVD videos.
MP4
MP4 format is a very popular format consisting of mp3 / AAC audio and h.264 codes with mpeg video. This is a very popular format for YouTubersM4V
M4V is an upgraded version of MP4 format. DRM technology is combined with mp4 to create M4V format. Although its exposure is still less than that of mp4.MKV
Its full form is Matroska. This is currently gaining popularity very fast. Because it is a combination of various formats of audio and video formats. Even new h.265 codes have been added. As a result, it is possible to zoom in and watch any part of the video. It is very easy and useful.MOV
There are also different formats for companies and devices. MOV, for example, is a format created by Apple that supports countless codecs. At the same time the video audio edit of this format is relatively straightforward.FLV and F4V
Finally, I will talk about FLV and F4V. These two were introduced by Adobe Flash. But now Adobe Flash has announced the closure of their activities, so these two formats can no longer hold their popularity!This was as little discussion today as it is about the various formats. Many, many good wishes!
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