What is F4V?
F4V is a new Flash Video file format, based on the ISO base media file format and is supported starting with Flash Player 9 update 3. Compared with the traditional FLV, it owns better quality under the same situations. Thus many people regard this kind of FLV as HD FLV (High Definition FLV). Due to this feature, nowadays most of people think it a development trend for FLV file. Of course, the video-sharing web sites also accept this type of FLV to upload and download, especially YouTube.
Differences between F4V and FLV
Because of restrictions in the FLV file format, Adobe Systems has created in 2007 new file formats including F4V, based on the ISO base media file format (MPEG-4 Part 12).
F4V is a video fromat for Adobe Flash Player. 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 is Adobe Systems moving away from the traditional FLV file structure.
The main difference between F4V and Flv lies in that F4V supports high definition video encoded in H.264 and code rate can be up to 50Mbps.
Codec 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
How to convert F4V ?
With this outstanding F4V Converter, you can easily convert F4V to all the popular formats as you like playable to your devices. It can supports you to convert F4V and FLV video to various video and audio formats, such as MOV, MP4, MPG, SWF, WMV, AAC, MP3 and so on with just a few clicks.
Cute screen of this wonderful F4V Converter:
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