Difference between FLV and F4V formats
Flash video is container file format used to deliver video over the internet using Adobe Flash Player versions 6-10. Flash Video content may also be embedded with SWF files. There are two different video file format known as Flash Video: FLV and F4V. Supported in Adobe Flash Player and developed by Adobe System, flash video has established itself as the format of choice for embedded video on the web. Flash Video is viewable on most operating systems, via the widely available Adobe Flash Player and web browser plugin, or one of several third-party programs.FLV is short for Flash Video. It contains material encoded with codecs following the Sorenson Spark or VP 6 video compression formats. The most recent public release of the Flash Player also supports H.264 video and HE-AAC audio. However, all of these codecs are restricted by patens. Flash video content may also be embedded within SWF Files. Audio and video data within FLV and SWF files are encoded with the same way. Flash Video is viewable on most operating systems, via the widely available Adobe Flash Player and web browser plugin, or one of several third-party programs. Besides, FLV Flash video is the first choice to add video to website. And Doremisoft video to flash converter can help you to convert any video format to flash video flv and swf and generate an HTML webpage embedded with flash video.
F4V is a new type of FLV file. A F4V file is encoded based on the ISO base media file format ( MPEG-4 PART 2) and is supported starting with Flash Player 9 update 3. Compared with the functional limits with the FLV structure when streaming H.264 or AAC which could not be overcome without a redesign of the file format, it owns better quality under the same situation. Many of the mainstream video-sharing webs start to accept the F4V file format. F4V does not support Screen video, Sorenson Spark, VP6 video compression formats and ADPCM, Nellymoser audio compression formats. A large part of the F4V format involves metadata. When Flash Player loads an F4V file, various stream properties are made available to run action script program are made avaiable to run via the Netstream on Metadata property.
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
