Flash Video - History

History

Support for video in SWF file format was added in Flash Player 6, released in 2002. In 2003, Flash Player 7 added direct support for FLV file format. Because of restrictions in the FLV file format, Adobe Systems has created in 2007 new file formats listed below, based on the ISO base media file format (MPEG-4 Part 12). Flash Player does not check the extension of the file, but rather looks inside the file to detect which format it is. The new file formats are completely different from the older FLV file format. For example, F4V does not support Screen video, Sorenson Spark, VP6 video compression formats and ADPCM, Nellymoser audio compression formats. Authors of Flash Player strongly encourage everyone to embrace the new standard file format F4V (ISO base media file format). There are functional limits with the FLV structure when streaming H.264 or AAC which could not be overcome without a redesign of the file format. This is one reason why Adobe Systems is moving away from the traditional FLV file structure.

FLV file format – used since 2002
File Extension Mime Type Description
.flv video/x-flv
F4V file format – used since 2007
File Extension Mime Type Description
.f4v video/mp4 Video for Adobe Flash Player
.f4p video/mp4 Protected Video for Adobe Flash Player
.f4a audio/mp4 Audio for Adobe Flash Player
.f4b audio/mp4 Audio Book for Adobe Flash Player

SWF files published for Flash Player 6 and later versions are able to exchange audio, video, and data over RTMP connections with the Adobe Flash Media Server. One way to feed data to Flash Media Server is from files in the FLV file format. Starting with SWF files created for Flash Player 7, Flash Player can play FLV file format directly (MIME type video/x-flv). Starting with SWF files created for Flash Player 9 Update 3, Flash Player can also play the new F4V file format.

Support for audio and video compression formats in Flash Player and in Flash Video
Flash Player version Released File format Video compression formats Audio compression formats
6 2002 SWF Sorenson Spark, Screen video MP3, ADPCM, Nellymoser
7 2003 SWF, FLV Sorenson Spark, Screen video MP3, ADPCM, Nellymoser
8 2005 SWF, FLV On2 VP6, Sorenson Spark, Screen video, Screen video 2 MP3, ADPCM, Nellymoser
9 2007 SWF, FLV On2 VP6, Sorenson Spark, Screen video, Screen video 2, H.264 MP3, ADPCM, Nellymoser, AAC
SWF, F4V, ISO base media file format H.264 AAC, MP3
10 2008 SWF, FLV On2 VP6, Sorenson Spark, Screen video, Screen video 2, H.264 MP3, ADPCM, Nellymoser, Speex, AAC
SWF, F4V, ISO base media file format H.264 AAC, MP3

  • Use of the H.264 and AAC compression formats in the FLV file format has some limitations and authors of Flash Player strongly encourage everyone to embrace the new standard F4V file format.

Read more about this topic:  Flash Video

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