Nowadays there are many types of FLV files ending with *.flv. However, their video codec is different, H.264, H.263, VP6, VP6 alpha, F4V, or M4V. Some player just can play FLV with h.263, VP6, VP6 alpha and can not play other types of FLV. For not supported FLV codec type, the player you use can not recognize it. Therefore the situation about abnormal playback will appear. Especially for F4V-another type of FLV encoded with H.264 belongs to HD video. You can view this type of FLV with the better video quality compared with the traditional FLV type like H.263, VP6, VP6 alpha and so on.

Aunsoft F4V Converter (FLV converter) is professional f4v video converter. It can perfectly convert .f4v into otehr video formats such as AVI, MPEG, MP4, 3GP, MOV, WMV, MP3, WMA, AAC, DV, DVD, DAT. And you can also convert f4v flash files to iPod,iPad, iPhone,iPhone 4, PSP, Apple TV, Zune, Xbox, Zen, DVD ,Android phone(HTC,T-Mobile, Sprint,Verizon Wireless,Samsung) and 3G mobiles. This F4V converter gives you full control over the audio and output settings.

F4V Converter can not only convert F4V files but also convert FLV video and all types of FLV input including encoded with H.264, H.263, On2 VP6 and Nellymoser for conversion. FLV videos are popular on the web and widely used by YouTube, MySpace, Facebook, Google Video, CNN, Amazon, New York Times, Washington Post, etc. With this F4V converter, you are enabled to enjoy your favorite flash F4V videos freely.
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The examples of some f4v application:

How to embed F4V/FLV (Flash Video) videos into PowerPoint?

The Best Flash Video (*.flv, *.f4v) to iPad Converter Released

Enjoy YouTube videos (FLV, F4V) on iphone 4 – Anytime, anywhere