General Instruction of WMV and WMV Data Recovery
General Instruction of WMV-Windows Media Video (WMV) is a video compression format for several proprietary codecs developed by Microsoft. The original video format, known as WMV, was originally designed for Internet streaming applications, as a competitor to RealVideo. The other formats, such as WMV Screen and WMV Image, cater for specialized content. Through standardization from the Society of Motion Picture and Television Engineers (SMPTE), WMV 9 has gained adoption for physical-delivery formats such as HD DVD and Blu-ray Disc.
History-In 2003, Microsoft drafted a video codec specification based on its WMV 9 codec and submitted it to SMPTE for standardization. The standard was officially approved in March 2006 as SMPTE 421M, better known as VC-1, thus making the WMV 9 format an open standard. Since then, VC-1 has become one of the three mandatory video formats for the Blu-ray format, along with H.262/MPEG-2 Part 2 and H.264.
Container format-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 Matroska or AVI container format. The resulting files have the.MKV and .AVI file extensions, respectively. One common way to store WMV in an AVI file is to use the WMV 9 Video Compression Manager (VCM) codec implementation.
What If WMV File Loss Happen?
If WMV file loss happened, the WMV file recovery software is strongly needed. Here I recommend you have a try on uFlysoft WMV Recovery for Mac.
The WMV Recovery well supports the advanced recovery settings, which enables you to recover WMV files easily. With its hi-tech scanning skill, you can scan your device deeply to find out all the lost WMV files in a few minutes. All you need is following the so-called “3-steps” operation below.
1. Install the free download application on your computer.
2. Launch the program and select your device where the lost WMV files were stored and start scanning.
3. After scanning finished, click the button “Recover”, you will be asked where you want to store the files. DO NOT save the recovered files to the same path where you lost them before.
After the three easy steps, you will find all your lost WMV files are coming back to you again.
Tips
If you are a Mac OS user, have a try on uFlysoft Data Recovery for Mac, the powerful data recovery software which enables you to perform “Mac data recovery” operation easily on your computer.
