Multimedia file format full explanation (top)--Audio and video

Video: Mp4/m4v/3gp/mpg, flv/f4v/swf, AVI, GIF, WMV, RMVB, MOV, MTS/M2T, webm/ogg/mkv

MP4 format is the most common kind of video file format, it now uses the video encoding is not the original MPEG4, but H.264/AVC video encoding and AAC audio encoding. It is a commercial video coding, the need for copyright fees abroad, generally more commonly used processors will have a hardware encoding and decoding the function of H. But because of its commercial copyrights, Firefox and Opera's HTML5 <video> tags do not fully support this format. M4V is a video format created by Apple, which is also a video and AAC audio codec with the goal of high-definition video (Blu-ray 720p +). 3GP is a feature of the mobile phone era of a video format, using H.263 video coding, poor quality, and now basically no use. The MPG format uses the MPEG Series video coding, the specific use to look at the different files, there is no unity.

FLV is the most popular streaming video format of the last few years, and it is the key to its long-term success (it does not seem to be the other format), it is the video format of adobe company Flash Software, which is played in the browser using the Flash Player plugin, All of the domestic online video sites (Youku, Tudou, etc.) have used it as a video file format. F4V is an improved version of FLV, support for more high-definition video, is now the domestic all online video web site PC-side video file format, it is more regrettable that H5 <video> does not have this format. SWF , like FLV and F4V, is one of Adobe's video formats, and its greatest feature is that it can be interactive and can be referred to as a software format. Page tours, online games, etc. in addition to the latest H5 are SWF format. Because of its power and convenience, its security has not been guaranteed, always to update Flash Player to fix the vulnerability.

AVI Video Coding is not uniform, but the common content of its file size is relatively large, it is not used frequently. It seems that there is another implicit meaning in this format that is related to Japan.

gif is strictly a picture format and not a video, but it can also be moved to a feature of the video, as described in the following image format GIF commentary.

WMV is Microsoft's video format, video encoded as modified MPEG-4, and audio is usually WAV encoded.

RMVB is the RealNetworks company video format, when the MP3, MP4 popular time and RM format, Real player player has been a fire, and now almost extinct.

MOV is an Apple video format, for the QuickTime software film format, in the film and television industry more use, daily seldom seen.

MTS is a micro-single, SLR, VCR and other professional camera video video production format, characterized by good quality, large size. m2t is some video editing software (such as the sound will be the shadow) export HD video format, there are some cameras recorded in this format, the volume is larger.

WebM is an open free video format for Google, which is developed based on the MKV format for HTML5 video propagation. OG G is also an open free video format for HTML5 video propagation. MKV is the Matroska company to replace AVI developed video format, then also occasionally appeared, and now extinct.

HTML5 Video and videos formats

	MP4	WebM	Ogg
Internet Explorer +	YES	NO	NO
Chrome	YES	YES	YES
Firefox	Partial Support (*)	YES	YES
Safari	YES	NO	NO
Opera	Partial Support (*)	YES	YES

MP4 = MPEG 4 files using H264 Video codec and AAC audio codec
WebM = WebM file uses VP8 video codec and Vorbis audio codec
OGG = Ogg file using Theora Video codec and Vorbis audio codec

*firefox and Opera previously did not support MP4, the newer version calls the system itself decoding interface, so in some of the old system and low-end hardware support, such as on the XP system does not support MP4, in Vista, WIN7, WIN8, MP4 is supported on WIN10 (note using standard H-coded).

On the domestic actual situation, the PC side still has a large number of ie7,ie8 and so on does not support H5 video, and the mainstream of modern browsers supported by a number of videos are not uniform, multi-format video will inevitably occupy a large number of server storage or computing (online transcoding) resources, so using F4V is the best choice , while the mobile side usually does not install flash Player, so it is necessary to use H5 video, and the domestic opera mobile phone is very rare, most of the use of chrome and its derivative version and Safari, so you can directly use the MP4 format, or WEBM or Ogg with very few cases of online transcoding. The scheme of the public article video is to use the standard MP4 (H. F Video encoding and AAC audio encoding).

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Audio: MP3, AAC/M4A, APE/FLAC, WAV, WMA, mid

MP3 is the most widely used audio file, encoded in the format of MPEG Layer 3, most of the current music files are this format, but the sound quality is compressed, only for the general public to meet the requirements of the high quality of the player.

AAC was developed from the MP3 format, with better sound quality and a higher compression ratio, which is now the standard audio encoding format for MPEG series video formats, but not yet popular on music files. M4A is also an AAC encoded music file, usually used in HTML5 audio's online music playback.

Ape and FLAC are lossless music files, ape compression is relatively high, FLAC is MP3 player compatible. The two are generally charged, suitable for high-quality players, of course, if there is a good headset or speakers.

WAV is a Microsoft music file, belongs to lossless audio compression, the file is relatively large, most mobile phones, MP3, MP4 and other equipment recordings produced by the files are one of the two files, webmaster material sound network in use.

WMA is also a lossy compressed music file of Microsoft, with compression ratios and sound quality higher than MP3, as well as part of the website in use.

MIDI differs from other audio files, but music codes, which can be interpreted as musical scores, are commonly used by music professionals and song lovers. Some phones also use this format as ringtones for mobile phones.

HTML5 Audio and format

	M4A	MP3	Wav	Ogg
Internet Explorer +	YES	YES	No (Microsoft's own format is not supported)	NO
Chrome	YES	YES	YES	YES
Firefox	Partial Support (*)	Partial Support (*)	YES	YES
Safari	YES	YES	YES	NO
Opera	Partial Support (*)	Partial Support (*)	YES	YES

* Firefox and Opera support for M4A and MP3 are the same as for MP4. For more details, refer to the Firefox Developer Documentation Multimedia Format section

Domestic mobile H5 online music uses the format M4A, while the PC uses the MP3 format that is loaded for Flash player.

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Multimedia file format full explanation (top)--Audio and video