Home Products Download Purchase Formats Freeware Support

Convert F4V to WMV

F4V to WMV Conversion Software converts F4V files to WMV. The software is an easy to use and professional video converter. F4V to WMV Conversion Software could choose the best fit bit rate automatically when converting file, so that the converter will keep original video and audio quality. And, size of outputted file is acceptable. You could also customize video size, frame rate, and bit rate. The software also supports common file format such as DivX, iPod, SWF, iPod touch, MKV, MP4, VCD, Archos, etc. It could convert MPG to Zune, M4V to iPod, OGV to VCD, H264 to 3GP, H264 to iPad, Y4M to M4V, and so on.

F4V to WMV Conversion Software supports batch conversion that enables you convert bulk F4V files to WMV at a time. The software is full compatible with 32-bit and 64-bit Windows 10/8/7/Vista/XP/2000.

F4V to WMV Conversion Software is compatible with Windows 10/8/7/Vista/XP/2008/2003/2000

What is F4V?
The F4V is another Flash Video file format defined by Adobe Systems and supported in Adobe Flash Player 9 Update 3 (9,0,115,0). The F4V file format is based on the format specified by ISO/IEC 14496-12: ISO base media file format.

Unlike SWF files, F4V files store multibyte integers in big-endian byte order. For example, as a UI16 in SWF file format, the byte sequence that represents the number 300 (0x12C) is 0x2C 0x01; as a UI16 in F4V file format, the byte sequence that represents the number 300 is 0x01 0x2C.

The F4V format is based on the ISO MP4 format, which in turn is based on the Apple QuickTime container format. The subsets of the format support different features. The ftyp box helps identify the features that a program must support to play a particular file. Flash Player does not enforce any restrictions with respect to ftyp boxes. The program tries to play any file it is given, within the restrictions of the codec types it supports.

What is WMV?
Windows Media Video (WMV) is a compressed video file format for several proprietary codecs developed by Microsoft. The original codec, known as WMV, was originally designed for Internet streaming applications, as a competitor to RealVideo. The other codecs, such as WMV Screen and WMV Image, cater for specialized content. Through standardization from the Society of Motion Picture and Television Engineers (SMPTE), WMV has gained adoption for physical-delivery formats such as HD DVD and Blu-ray Disc.

A WMV file is in most circumstances encapsulated in the Advanced Systems Format (ASF) container format. The file extension .WMV typically describes ASF files that use Windows Media Video codecs. The audio codec used in conjunction with Windows Media Video is typically some version of Windows Media Audio, or in rarer cases, the deprecated Sipro ACELP.net audio codec. Microsoft recommends that ASF files containing non-Windows Media codecs use the generic .ASF file extension.

The ASF container can optionally support digital rights management using a combination of elliptic curve cryptography key exchange, DES block cipher, a custom block cipher, RC4 stream cipher and the SHA-1 hashing function.

Although WMV is generally packed into the ASF container format, it can also be put into the AVI or Matroska container format. The resulting files have the .AVI and .MKV file extensions, respectively. WMV can be stored in an AVI file when using the WMV 9 Video Compression Manager (VCM) codec implementation. Another common way to store WMV in an AVI file is to use the VirtualDub encoder.

Windows Media Video (WMV) is the most recognized video format within the WMV family. Usage of the term WMV often refers to the Microsoft Windows Media Video codec only. Its main competitors are MPEG-4 AVC, AVS, RealVideo, DivX, and Xvid. The first version of the codec, WMV 7, was introduced in 1999, and was built upon Microsoft's implementation of MPEG-4 Part 2. Continued proprietary development led to newer versions of the codec, but the bit stream syntax was not frozen until WMV 9. While all versions of WMV support variable bit rate, average bit rate, and constant bit rate, WMV 9 introduced several important features including native support for interlaced video, non-square pixels, and frame interpolation. WMV 9 also introduced a new profile titled Windows Media Video 9 Professional, which is activated automatically whenever the video resolution exceeds 300,000 pixels (e.g., 528x576, 640x480 or 768x432 and beyond) and the bitrate 1000 kbit/s. It is targeted towards high-definition video content, at resolutions such as 720p and 1080p.