Advanced Systems Format
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 Media Foundation framework.
Overview and features
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 media contained within an ASF file are Windows Media Audio (WMA) and Windows Media Video (WMV). The most common file extensions for ASF files are extension .WMA (audio-only files using Windows Media Audio, with MIME-type audio/x-ms-wma) and .WMV (files containing video, using the Windows Media Audio and Video codecs, with MIME-type video/x-ms-asf). These files are identical to the old .ASF files but for their extension and MIME-type. The different extensions are used to make it easier to identify the content of a media file.
ASF
ASF may refer to:
Arts and entertainment
Science and technology
Computing
.asf), a Microsoft's streaming format
Arsenic trifluoride
Arsenic trifluoride is a chemical compound of arsenic and fluorine with the chemical formula AsF3. It is a colorless liquid which reacts readily with water.
Preparation and properties
It can be prepared by reacting hydrogen fluoride, HF, with arsenic trioxide:
It has a pyramidal molecular structure in the gas phase which is also present in the solid. In the gas phase the As-F bond length is 170.6 pm and the F-As-F bond angle 96.2°.
Arsenic trifluoride is used as fluorinating non-metal chlorides to fluorides, in this respect it is less reactive than SbF3.
Salts containing AsF4− anion can be prepared for example CsAsF4. the potassium salt KAs2F7 prepared from KF and AsF3 contains AsF4− and AsF3 molecules with evidence of interaction between the AsF3 molecule and the anion.
With SbF5 the ionic adduct AsF2+ SbF6− is produced
References
Podcasts:
Latest News for: asf
ASF team members impress at NSCD Spring Championships
The Daily Gazette 17 Apr 2025The MConfirmed outbreak of African Swine Fever (ASF) in Koilatar village under Lhamoidzingkha Gewog, Dagana Dzongkhag (MOAL - Ministry of Agriculture and Livestock of Bhutan)
Public Technologies 15 Apr 2025ASF holds meena bazaar
The News International 12 Apr 2025Supplementation of OGSM agenda for 29(30).04.2025 (COTE 20250411152451 COTE 08 04 2025 RC 8 ASF si BVB EN) (CONPET SA)
Public Technologies 11 Apr 2025ASF snowboarders compete in USASA National Championships
The Daily Gazette 10 Apr 2025ASF resurgence: Pig casualties in Mizoram cross 1500
The Times of India 09 Apr 2025Nueva Ecija vaccine center aims to curb billions in livestock losses due to ASF, FMD
Manila Bulletin 09 Apr 2025OGMS Resolution 08.04.2025 (COTE 20250408152233 COTE 08 04 2025 RC 7 ASF si BVB EN) (CONPET SA)
Public Technologies 08 Apr 2025- 1
- 2
- Next page »