Why do we need Codecs for videos :
Popular Video Codecs:
- The purpose of codecs is to reduce the size of digital audio samples and video frames in order to speed up transmission and save storage.
- Generally video files are large, they become difficult to transfer across internet quickly.
- Codecs were built to encode a signal for transmission and then decode it for viewing or editing.
- Codecs are software that enable your devices(Camera, Editor, Player) to perform video encoding and/or decoding(video compression and de-compression).
- MPEG-4:
- MPEG-4 is the most common streaming format and it consists of many parts,it consists of many parts, of which only MPEG-4 Part II is used for video coding.
- The use of this encoder(compression algorithm) can be a 120 minute film (the original video files) is compressed to about 300MB.
- This compression algorithm of the MPEG are used by many encoding formats, such as ASF, DivX, Xvid, mp4 are using the MPEG-4 compression algorithm.
- DivX/Xvid :
- DivX is a commercially sold codec,while Xvid is an open source version of Divx.
- Both codecs can decode the output of the other, as they are both built on the implementation of MPEG-4.
- Most of the DivX videos use avi file extension, of course, DivX and Div extension.
- H.264:
- This is the most common codec used in modern camcorders and digital cameras that capture to file-based devices (hard drives, memory cards, and so on).
- It can utilize both lossy and lossless compression depending on the settings you choose when encoding, such as frame rate, quality, and target file size.
- Video compression on H.264 Codec :
- Finding Video Codecs on computer :
- Using windows media player :
- Using "msinfo32" command in Run :
