Audio/Video Encoding format Summary

I. Audio Codec format
* MPEG audio layer 1/2
* MPEG audio Layer 3 (mp3)
* MPEG2 AAC
* MPEG4 AAC
* Windows Media audeo V1/v2/7/8/9
* RealAudio cook/sipro (Real Media Series)
* RealAudio AAc/aacplus (Real Media Series)
* Qdesign music 2 (apple series)
It is a qdesign company developed for high fidelity and high compression ratio encoding method, similar to MP3, but more advanced than MP3. Supports stream playback.
* Apple MPEG-4 aac (apple series)
* Ogg (Ogg Vorbis audio)
* AC3 (dedicated DVD Audio Encoding)
* DTS (dedicated DVD Audio Encoding)
* Ape (monkey's audio)
* Au (Sun format)
* FLAC (fress lossless audio)
* M4a(mpeg-4 (((you can change the apple name to .mp4)
* MP2 (MPEG audio Layer2 audio)
* WMA
Ii. Video Codec format
* Mpeg1 (VCD)
* MPEG2 (DVD)
* MPEG4 (DivX, Xvid)
* MPEG4 AVC/H.264
* H.261
* H.262
* H.263
* H.263 +
* H.263 ++
* MPEG-4 V1/v2/V3 (Microsoft Windows Media Series)
* Windows Media video 7/8/9/10
* Sorenson video 3 (for qt5, standard) (apple series)
* Realvideo G2 (Real Media Series)
* Realvideo 8/9/10 (Real Media Series)
* Apple MPEG-4 (apple series)
* Apple H.264 (apple series)
* Flash video
Iii. audio and video file formats
First, we need to identify the differences between media files and encoding: files are a collection of videos, audio, scripts, and containers; the compression algorithm of the video and audio in the file is the specific encoding.
* Avi
Audio/Video interaction storage, the most common audio/video container. The most supported video and audio encoding is supported.
* MPG
The audio and video containers used by MPEG encoding have the characteristics of stream. PS is classified into ps, ts, etc. PS is mainly used for DVD storage, and Ts is mainly used for HDTV.
* Vob
DVD adopts the audio and video container format (I .e. video MPEG-2, AC3 or DTS for audio), supports multi-video, multi-track, multi-subtitle chapter, etc.
* MP4
MPEG-4 coding uses the audio and video container, developed based on QuickTime mov, has many advanced features.
* 3GP
The 3GPP video format is mainly used for streaming media transmission.
* ASF
The audio and video containers used by Windows Media can be used for stream transmission and include scripts.
* RM
The audio and video container used by RealMedia for stream transmission.
* Mov
The QuickTime audio and video container is probably the most powerful container today, and even supports VR technology, Java, and so on. Its variants MP4 and 3GP are not so powerful.
* MKV
MKV can combine Windows Media video, realvideo, MPEG-4 and other video audio into a file, and supports multi-track, Chapter subtitles and so on.
* WAV
A type of audio container (Note: It is only audio). Generally speaking, WAV is a PCM code without compression. In fact, WAV can also include other ACM compression codes such as MP3.
Iv. audio and video technology
VCD
DVD
How the DVD directory works
Audio CD
* The standard CD format is the sampling frequency of 44.1k, with a rate of 88 K/second and 16-bit quantified digits.
**. CDA format. This is the CD audio. a cd audio file is *. the CDA file is only an index information and does not really contain sound information. Therefore, regardless of the length of the CD music, the "*. all CDA files are 44 bytes long.
MP3
* The compression of MPEG audio files is lossy. The mpeg3 audio encoding is 10:1 ~ High compression rate, while basically keeping the low audio part not distorted, but at the expense of the sound file 12 kHz to 16 KHz high audio part of the quality in exchange for the file size, for music files of the same length, use *. only *. 1/10 of the wav file, and the audio quality must be in the audio CD or WAV format.
* There are many sampling frequencies for MP3 compressed music. You can use 64 kbps or a lower sampling frequency to save space. You can also use the kbps standard to achieve extremely high sound quality.
* The MP3 format of music per minute is only about 1 MB.
MIDI:
People who often play music should often hear the term Musical Instrument Digital Interface, which allows a digital synthesizer to exchange data with other devices. The mid file format is inherited by Midi. The mid file records the sound information instead of a recorded sound, and then instructs the sound card how to reproduce the music. Such a MIDI file only uses 5 to 5 minutes of music ~ 10 KB. Today, the mid file is mainly used for original musical instrument works, amateur performances of popular songs, game audio tracks, and e-cards. * The replay effect of the mid file depends on the Sound Card grade. * The most useful mid format is in the field of computer composing. * The mid file can be written by the Composing software, or the music played by the external sequencer can be input into the computer through the Midi port of the sound card to form the *. Mid file.
WMA:
* Generally, the compression rate of WMA can reach around. Another advantage of WMA is that content providers can use the digital rights management solution, such as Windows Media Rights Manager 7, to add anti-copy protection. This built-in copyright protection technology can limit the playback time, the number of playbacks, and even the number of playbacks. This is a good news for music companies that have been overwhelmed by piracy, in addition, WMA supports stream technology and is suitable for online playing on the network.
* The WMA format allows you to adjust the sound quality during recording. In the same format, the sound quality is comparable to that of Cd, and the compression rate is high, which can be used for network broadcast.
5. Identify Audio Encoding formats by file name
*. AAC
Audio Encoding: AAC
*. AC3
Audio Encoding: AC3
*. Ape
*. Au
Audio Encoding: pcm_s16be
*. M4a
Audio Encoding: MPEG4 AAC
*. MP2
*. MP3
*. Ogg
Audio Encoding: Vorbis
*. Wav
Audio Encoding: pcm_s16le
*. Flav
*. Wma
Audio Encoding: wma7x
Recognize Audio Encoding formats with file name identifiers
1. *. MP4 (MP4 MPEG-4 video)
Video Encoding: MPEG4
Audio Encoding: MPEG4 AAC
2. *. 3GP (3GPP third-generation cooperation project)
Video Encoding: MPEG4
Audio Encoding: amr_nb (Mono, 8000Hz, sample depth 16 bit, bitrate 12 Kbps)
3. *. 3g2 (3GPP third-generation cooperation project 2)
Video Encoding: MPEG4
Audio Encoding: MPEG4 AAC
4. *. asf (ASF advanced stream format)
Video Encoding: msmpeg4
Audio Encoding: MP3
5. *. AVI (AVI audio/video staggered format)
Video Encoding: MPEG4
Audio Encoding: pcm_s161e
6. *. AVI (DivX video)
Video Encoding: MPEG4
Audio Encoding: MP3
7. *. AVI (Xvid video)
Video Encoding: Xvid
Audio Encoding: MP3
8. *. vob (DVD)
Video Encoding: MPEG2 Video
Audio Encoding: AC3
9. *. FLV (Flash video format)
Video Encoding:
Audio Encoding: MP3
10. *. MP4 (iPod 320*240 MPEG-4 video format)
Video Encoding: MPEG4
Audio Encoding: MPEG4 AAC
11. *. MP4 (iPod video2 640*480 MPEG-4 video format)
Video Encoding: MPEG4
Audio Encoding: MPEG4 AAC
12. *. mov (mov Apple QuickTime format)
Video Encoding: mpeg4_qt
Audio Encoding: MPEG4 aac_qt
13. *. mpg (mpeg1 video)
Video Encoding: mpeg1 video
Audio Encoding: MP2
14. *. mpg (MPEG2 Video)
Video Encoding: MPEG2 Video
Audio Encoding: MP2
15. *. MP4 (MPEG4 AVC Video Format)
Video Encoding: H.264
Audio Encoding: MPEG4 AAC
16. *. MP4 (PSP MPEG4 video)
Video Encoding: Xvid
Audio Encoding: MPEG4 AAC
17. *. MP4 (psp avc Video Format)
Video Encoding: H.264
Audio Encoding: MPEG4 AAC
18. *. RM (RM realvideo)
Video Encoding: rv10
Audio Encoding: AC3
19. *. mpg (super VCD)
Video Encoding: MPEG2 Video
Audio Encoding: MP2
20. *. SWF (swf format)
Video Encoding:
Audio Encoding: MP3
21. *. mpg (Video CD format)
Video Encoding: mpeg1 video
Audio Encoding: MP2
22. *. vob (MPEG2 PS format)
Video Encoding: MPEG2 Video
Audio Encoding: AC3
23. *. wmv (Windows video format)
Video Encoding: wmv3x
Audio Encoding: wma7x