ASF to M4V

ASF to M4V Converter, Convert ASF to M4V

Home

Getting Started

Convert ASF to M4V

Total Video Audio Converter converts ASF to M4V with high quality easily. The converter supports MPEG-4 and H.264 codecs for M4V file. With the ASF to M4V conversion software, you could set bit rate, frame rate, video size, aspect ratio, etc. By default, the software calculates bit rate for result M4V file according to original video size automatically. As large video size needs bigger bit rate.

Besides M4V, the converter converts ASF to popular formats and portable devices such as MP4, WebM, MPG, FLV, iPad, H.264, PS3, iPhone, BlackBerry, iPod, and so on. The software also other video and audio formats, for example, EVO to DivX, DIVX to MP4, MPEG to Xbox 360, 3G2 to iPhone, DVR-MS to BlackBerry, VOB to MKV, M4V to MOV, 3G2 to MPG, and so on.

ASF to M4V conversion software could convert file in batch. And, it's full compatible with 32-bit and 64-bit Windows 7.

ASF to M4V Conversion Software is compatible with Windows 10, 8, 7, Vista, 2008, 2003, and 2000

What is ASF?
Advanced Systems Format (formerly Advanced Streaming Format, Active Streaming Format) is Microsoft's proprietary digital audio/digital video container format, especially meant for streaming media. ASF is part of the Windows Media framework.

ASF is based on serialized objects which are essentially byte sequences identified by a GUID marker.

The format does not specify how (i.e. with which codec) the video or audio should be encoded; it just specifies the structure of the video/audio stream. This is similar to the function performed by the QuickTime, AVI, or Ogg container formats. One of the objectives of ASF was to support playback from digital media servers, HTTP servers, and local storage devices such as hard disk drives.

The most common filetypes contained within an ASF file are Windows Media Audio (WMA) and Windows Media Video (WMV). Note that the file extension abbreviations are different from the codecs which have the same name. Files containing only WMA audio can be named using a .WMA extension, and files of audio and video content may have the extension .WMV. Both may use the .ASF extension if desired.

ASF files can also contain objects representing metadata, such as the artist, title, album and genre for an audio track, or the director of a video track, much like the ID3 tags of MP3 files. It supports scalable media types and stream prioritization; as such, it is a format optimized for streaming.

The ASF container provides the framework for digital rights management in Windows Media Audio and Windows Media Video. An analysis of an older scheme used in WMA reveals that it is 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.

ASF container-based media is usually streamed on the internet either through the MMS protocol or the RTSP protocol.

What is M4V?
M4V is a file container format used by Apple's iTunes application. The M4V file format is a video file format developed by Apple and is very close to MP4 format. The differences are the optional Apple's DRM copyright protection, and the treatment of AC3 (Dolby Digital) audio which is not standardized for MP4 container.

Apple uses M4V files to encode TV episodes, movies, and music videos in the iTunes Store. The copyright of M4V files may be protected by using Apple's FairPlay DRM copyright protection. To play a protected M4V file, the computer needs to be authorized (using iTunes) with the account that was used to purchase the video. However, unprotected M4V files without AC3 audio may be recognized and played by other video players by changing the file extension from '.m4v' to '.mp4'.

Besides Apple iTunes and Apple QuickTime Player, M4V files can also be opened and played with the version of Windows Media Player included with Windows 7, Media Player Classic, RealNetworks RealPlayer, VideoLAN VLC media player and Nero Showtime (included with Nero Multimedia Suite). The format, with DRM removed, can also be played in the webOS Video Player for use on the Palm Pre, Palm Pixi smartphones. It is also playable by the Android operating system with its video player. It can also be played with the BS Player Pro.

M4V video with FairPlay attached to it is read in QuickTime as AVC0 Media.

Step-by-Step Instructions to Converting ASF to M4V

Click here to download ASF to M4V Conversion Software free
Install the software by step-by-step instructions
Launch ASF to M4V Conversion Software
Choose ASF files

Add Files

ASF

ASF

Open

Choose "to M4V"

[Optional, for advanced user] If you want to change M4V encoding parameters, for example, vodec codec, bit rate, frame rate, video size, and aspect ratio, please click "Options".