WMV to MP3: Extract Audio from WMV(Windows Media Video) Video to MP3(MPEG Layer-3) with River Past Audio Converter, WMV2MP3 converter, conversion
WMV stands for Windows
Media Video -- developed and controlled by Microsoft. WMV is a generic name
of Microsoft's video encoding solutions and doesn't necessarily define the technology
what it uses -- since version 7 (WMV7) Microsoft has used its own flavour of
MPEG-4 video encoding technology.
DivX video format is originally based on hacked
Windows Media Format 11 adds support for HD video up to 1080P. WMF 11 runs
only on Windows XP and Vista.
Additional information is available on Microsoft
Windows Media page.
MP3 is a digital audio
compression algorithm that acheives a compression factor of about twelve while
preserving sound quality. It does this by optimising the compression according
to the range of sound that people can actually hear. MP3 is currently (July
1999) the most powerful algorithm in a series of audio encoding standards developed
under the sponsorship of the Moving Picture Experts
Group (MPEG) and formalised by the International Organization for Standardization
MP3 is very different from Layer 2, using an additional MDCT layer to increase
frequency resolution. Its scale factor groups are more optimised for the human
ear, and it uses nonlinear sample quantisation and Huffman coding. MP3 files
(filename extension ".mp3") can be downloaded from many World-Wide
Web sites and can be played using software available for most operating systems
(also downloadable), e.g. Winamp for PC,
MacAmp for Macintosh, and mpeg123 for Unix. MP3 files are usually downloaded
completely before playing but streaming MP3 is also possible. A program called
a "ripper" can be used to copy a selection from a music CD onto your
hard disk and another program called an encoder can convert it to an MP3 file.
Windows ships with limited MP3 encoding support. The output sample rate is
limited to 24khz and the bitrate is limited 56kbps. However, many add-on packages
from open source community make it possible to encode at higher sample rate
A commonly used open source codec is LAME.
LAME comes in different forms, including a ACM (Audio compression manager) codec
and a DLL (lame_enc.dll). Caution: LAME ACM does not work well on many computers,
regardless which software is loading it. It is best to avoid installing LAME
ACM and use lame_enc.dll instead.
MPEG.ORG is an excellent source for additional
information on MPEG format and usage.
When you encode MP3 audio, we recommend you to install lame_enc.dll.
Launch River Past Audio Converter
Once River Past Audio Converter is installed properly, launch Audio Converter.
Click on the "Add" button on the tool bar. The standard file open dialog appears. Select "WMV - Windows Media Video" 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 "MP3 - MPEG Layer-3" as the "Audio Type".
You can change the sample rate, channel (stereo or mono) and bitrate.
Note: The standard MPEG Layer-3 audio compressor is limited to maximum 24khz and 56kbps. Please install Lame_enc.dll for higher sample rate and bitrate.
Select output directory
Expand the "Output Directory" panel. Use the "Browse" button to select an output directory.
Click the "Convert" button on the tool bar.
River Past Audio Converter