OFR, short for OptimFROG, is proprietary
lossless audio data compression codec created by Florin
Ghido. OFR aims to optimize the high compression ratios and
the price of slower encoding and decoding as well. OptimFROG
DualStream which aims to fill gap between perceptual coding
and lossless coding is another format of OptimFROG file,
both of which could store the metadata by using PEv2 tags.
ASF is Advanced Streaming Format. It
is an extensible file format developed primarily for storing
synchronized digital video, audio, subtitle streams, or
transmitting data on the internet. ASF is also a multimedia
container of Windows Media Video or Windows Media Audio.
To convert OFR to asf, please install
OptimFrog DirectShow decoder filter.
ASF Converter which can
convert ofr to asf file. Select an ofr file, change
audio encoding bitrate if necessary, rename the output file to asf
RAM means Real Audio Media which is a
kind of audio media format developed by Real Networks. ram
adopts Realís unique compression algorithm which may audio
data or point to a section of the online audio streams (need
Please install RealPlayer
RealMediaSplitter to convert ram to asf.
M4A is the standard file extension of
MPEG4 audio. M4A is mentioned in it's standards that the
extension of normal file is *.mp4, which becomes popular
since itís firstly been used in iTunes and iPod by Apple to
differ MPEG4ís audio from its video. Now almost all software
that support mp4 could also support m4a files format.
To convert m4a to asf, please install
m4a decoder and m4a splitter. If the m4a is protected or
encrypted, the conversion will fail.