ASF to MPA: Extract Audio from ASF(Advanced Streaming Format) Video to MPA(MPEG Audio) with River Past Audio Converter, ASF2MPA converter, conversion
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.
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.
What is
MPA?
There are three "layers" in the MPEG-1
Audio specification.
In MPEG Audio Layer-1, a simple 32-subband audio compressor using a floating
point representation for subband samples. Resolution and scale factor are stored
for groups of 12 subsamples. MP1 is only used for Philips DCC Digital Compact
cassette with data rates of 384 kbps.
Both MPEG-1 and MPEG-2 files use MPEG-1
Audio Layer-2.
MPEG-1 Audio Layer-3 becomes
the widely popular MP3.
MPEG.ORG is an excellent source for additional
information on MPEG format and usage.
To encode MPEG Audio, you will need River
Past MPEG-2 Booster Pack in addition to your audio software.
Additional Requirements
To extract audio from ASF(Advanced Streaming Format) video to MPA(MPEG Audio) with River Past Audio Converter, you must have River Past MPEG-2 Booster Pack installed.
Launch River Past Audio Converter
Once River Past Audio Converter is installed properly, launch Audio Converter.
Add File
Click on the "Add File" button on the tool bar. The standard file open dialog appears. Select "ASF - Advanced Streaming Format" in its "Files of type" combo box.
Select the file you want to convert and click "Open". The file will be added to the conversion file list.
River Past Audio Converter
Select Output Format
Use the setting panel on the bottom of the window to control the output format. Click on the toggle to the left of the "Format" label to expand the panel. Select "MPA - MPEG Layer-2" as the "Audio Type".
You can change the sample rate, channel (stereo or mono) and bits/sample, and bitrate.
Note: The MPEG-2 Booster Pack must be installed for the "MPA - MPEG Layer-2" output option to show.
Select output directory
Expand the "Output Directory" panel. Use the "Browse" button to select an output directory.
Convert
Click the "Convert" button on the tool bar.
River Past Audio Converter
