[Yunxiang book club issue 13] packaging format and coding format of audio files

MP3 Is the audio packaging format . Audio coding format generally has ：AAC,AC3.

ID3V2 The location of is in the file header ,ID3V1 The location of is at the end of the file , The length is 128 byte .

MP3 It is both a packaging format and a coding format .

A complete video file is composed of audio and video 2 Part of .H264、Xvid And so on is the video encoding format ,MP3、AAC And so on is the audio coding format .

Because of many kinds of video coding files 、 The audio coding files all conform to AVI Packaging requirements , It means even AVI suffix , It may also have different specific coding formats . So it appears on some devices , The same is AVI Suffix file , Some can be played normally , Others cannot be played .

The same applies to other container formats . Even if RMVB、WMV Waiting is no exception . Some technologically advanced containers can also encapsulate multiple videos at the same time 、 Audio encoding file , Even with subtitles , Such as MKV Package format .MKV A file can include multilingual pronunciation 、 Multilingual subtitles , Suitable for the needs of different people .