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.
| File Extension | Mime Type | Description |
|---|---|---|
| .flv | video/x-flv |
| 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.
| 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
Famous quotes containing the word history:
“The history of all Magazines shows plainly that those which have attained celebrity were indebted for it to articles similar in natureto Berenice—although, I grant you, far superior in style and execution. I say similar in nature. You ask me in what does this nature consist? In the ludicrous heightened into the grotesque: the fearful coloured into the horrible: the witty exaggerated into the burlesque: the singular wrought out into the strange and mystical.”
—Edgar Allan Poe (1809–1849)
“When the coherence of the parts of a stone, or even that composition of parts which renders it extended; when these familiar objects, I say, are so inexplicable, and contain circumstances so repugnant and contradictory; with what assurance can we decide concerning the origin of worlds, or trace their history from eternity to eternity?”
—David Hume (1711–1776)
“In nature, all is useful, all is beautiful. It is therefore beautiful, because it is alive, moving, reproductive; it is therefore useful, because it is symmetrical and fair. Beauty will not come at the call of a legislature, nor will it repeat in England or America its history in Greece. It will come, as always, unannounced, and spring up between the feet of brave and earnest men.”
—Ralph Waldo Emerson (1803–1882)