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.

Best FLV/F4V Converter

Best F4V Converter for Windows

Best F4V Converter for Mac

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.