F4V

What is the F4V file format?

F4V is a new type of FLV file. 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.

For F4V Converter, please click here.

F4V is encoded with H.264 video codec which is the reason for better video quality. Not all the FLV converters can process it successfully. Therefore, choosing a suitable program is very important. Otherwise, you will complain to buy a useless YouTube converter as this type of FLV can not be recognized by some FLV converters.

The F4V format is based on the format specified by ISO/IEC 14496-12: ISO base media file format. A large part of the F4V format involves metadata. When Flash Player loads an F4V file, various stream properties are made available to a running ActionScript program via the NetStream.onMetaData property. The available properties differ depending on the software used. The F4V file format supports an assortment of optional tag boxes that can occur within a moov box.

Starting with SWF files published for Flash Player 9 Update 3 (9,0,115,0), Flash Player can play F4V files.

For more information please check here:

http://www.adobe.com/devnet/flv/pdf/video_file_format_spec_v9.pdf

What is H264, FLV?

What is H.264?

H.264 is the next-generation video compression technology in the MPEG-4 standard, also known as MPEG-4 Part 10. H.264 can match the best possible MPEG-2 quality at up to half the data rate. H.264 also delivers excellent video quality across the entire bandwidth spectrum — from 3G to HD and everything in between (from 40 Kbps to upwards of 10 Mbps).

What is the FLV file format?

Starting with SWF files published for Flash Player 6, Flash Player can exchange audio, video, and data over RTMP connections with the Adobe Flash Media Server... One way to feed data to Flash Media Server (and thus on to Flash Player clients) is from files in the FLV file format.

Starting with SWF files published for Flash Player 7, Flash Player can also play FLV files directly with MIME type video/x-flv.

An FLV file encodes synchronized audio and video streams. The audio and video data within FLV files are encoded in the same way as audio and video within SWF files.

More relevant instruction for FLV, f4v and H.264:

Flash Video is the name of a file format used to deliver video over the Internet using Adobe Flash Player version 6 or newer. Flash Video content may also be embedded within SWF files. Until version 9 update 3 of the Flash Player, Flash Video referred to a proprietary file format, having the extension .FLV, but Adobe introduced new file extensions and MIME types and suggests using those instead of the old FLV:

Refer to:

How to convert F4V to AVI?
How to download F4V video files?
How to play F4V video?