Billy! MP3 and OGG are both audio file compression systems. What is
your reason for converting MP3 files to OGG? Performing this conversion
might give you smaller files but the audio quality will go down. Consider
the following quote from the Ogg Vorbis General FAQ.
The higher the bit rate and the deeper the bit depth the higher the
quality of the resulting audio and the more space it takes up and the longer
it takes to transfer. It comes down to a question of economics. Ultimately
if you can afford the space and can cope with the longer time it takes to
transfer larger files then you wouldn't want to use either MP3 or OGG.
(Begin Quote)
Can I convert my MP3 collection to the Ogg Vorbis format?
You can convert any audio format to Ogg Vorbis. However, converting from one
lossy
format, like MP3, to another lossy format, like Vorbis, is generally a bad
idea.
Both MP3 and Vorbis encoders achieve high compression ratios by throwing
away parts
of the audio waveform that you probably won't hear. However, the MP3 and
Vorbis codecs
are very different, so they each will throw away different parts of the
audio, although
there certainly is some overlap. Converting a MP3 to Vorbis involves
decoding the
MP3 file back to an uncompressed format, like WAV, and recompressing it
using the
Ogg Vorbis encoder. The decoded MP3 will be missing the parts of the
original audio
that the MP3 encoder chose to discard. The Ogg Vorbis encoder will then
discard other
audio components when it compresses the data. At best, the result will be an
Ogg
file that sounds the same as your original MP3, but it is most likely that
the resulting
file will sound worse than your original MP3. In no case will you get a file
that
sounds better than the original MP3.
Since many music players can play both MP3
and
Ogg files, there is no reason that you should have to switch all of your
files to
one format or the other. If you like Ogg Vorbis, then we would encourage you
to use
it when you encode from original, lossless audio sources (like CDs). When
encoding
from originals, you will find that you can make Ogg files that are smaller
or of
better quality (or both) than your MP3s.
(If you must absolutely must convert from MP3 to Ogg, there are several
conversion
scripts available on Freshmeat.)
(End Quote)
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