On Thu, Jan 26, 2012 at 5:15 AM, V G <x.solarwind.x@gmail.com> wrote:
> I do quite a bit of MP3 encoding (many hours worth of audio) for my
> lectures. I have a multi core CPU and it seems that LAME can't do
> multi threaded MP3 encoding. I've searched and the best answer I could
> find was that "MP3 encoding is not suited for multiple CPUs". So I did
> an experiment where I take an hour and a half long audio file and
> encode it to a single MP3 file. I end up with a 95.7MB MP3 file. I
> then split the audio file 8 times and encoded each piece. The sum of
> the size of 8 MP3 files is again 95.7MB (+/- a few KB I assume). So I
> don't see any loss in size efficiency by splitting an audio track 8
> times and encoding each piece.
>
> I did the test in Audacity, but it encodes each piece sequentially
> instead of at the same time. I might be able to write a script to
> split a raw audio file into 8 pieces, encode each in its own thread,
> and join the 8 pieces into one large file.
>
> Any thoughts on this?
>
> I should be able to join MP3s without re-encoding, right?

Update: I just tried some random windows program to join MP3s to form
a single MP3 file and it worked pretty much instantaneously,
suggesting that the join process does not involve re encoding
anything. This is wonderful. Off to write a script for multi threaded
LAME now.

Any more thoughts on this?
--=20
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