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FLV | Flash Video

 
Flash Video
Filename Extension .flv, .f4v, .f4p, .f4a, .f4b
Internet Media Type video/x-flv, video/mp4, video/x-m4v, audio/mp4a-latm, video/3gpp, video/quicktime, audio/mp4
Developed by Adobe Systems (originally developed by Macromedia)
Type of format Media Container
Contained for Audio, video, text, data
Extended from FLV: SWF F4V: MPEG-4 Part 12

There are two different video file formats (FLV and F4V) that are known as Flash Video, which is a container file format used to deliver video over the Internet using Adobe Flash Player.he audio and video data within FLV files are encoded in the same manner as they are within SWF files. The latter F4V file format is based on the ISO base media file format and is starting with Flash Player 9 update 3.


Encoding

Commonly, Flash Video FLV files contain video bit streams which are a proprietary variant of the H.263 video standard, under the name of Sorenson Spark (FourCC FLV1). Sorenson Spark is an older codec for FLV files but it is also a widely available and compatible one, because it was the first video codec supported in Flash Player. It is the required video compression format for Flash Player 6 and 7. Flash Player 8 and newer revisions also support the playback of On2 TrueMotion VP6 video bit streams (FourCC VP6F or FLV4). On2 VP6 is the preferred video compression format for use with Flash Player 8 and higher. On2 VP6 can provide a higher visual quality than Sorenson Spark, especially when using lower bit rates. On the other hand it is computationally more complex and therefore will not run as well on certain older system configurations.

The Flash Video FLV file format supports two versions of a so called 'screenshare' (Screen video) codec which is an encoding format designed for screencasts. Both these formats are bitmap tile based, can be lossy by reducing color depths and are compressed using zlib. The second version is only playable in Flash Player 8 and newer.

Audio in Flash Video files is usually encoded as MP3. However, audio in Flash Video FLV files recorded from the user's microphone use the proprietary Nellymoser Asao Codec.(Flash Player 10 released in 2008 also supports the open source Speex codec. FLV files also support uncompressed audio or ADPCM format audio. Recent versions of Flash Player 9 support AAC (HE-AAC/AAC SBR, AAC Main Profile, and AAC-LC).

Support for encoding Flash Video files is provided by an encoding tool included with Adobe's Flash Professional and Creative Suite products, On2's Flix encoding tools, Sorenson Squeeze, FFmpeg and other third party tools.


Media type support

Supported media types in FLV file format:

Video: On2 VP6, Sorenson Spark (Sorenson H.263), Screen video, H.264

Audio: MP3, ADPCM, Linear PCM, Nellymoser, Speex, AAC, G.711 (reserved for internal use)



Supported media types in F4V file format:

Video: H.264

Images (still frame of video data): GIF, PNG, JPEG

Audio: AAC, HE-AAC, MP3

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Version: 3.6.15
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Version: 3.2.7
Size: 33.9 MB

Requirements

You can download Blu-ray Media Player and test it before buying.

Requires OS X 10.5+ and Blu-ray Drive

Requires Windows XP or later and Blu-ray Drive

Having Problems

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