Re: [MEncoder-users] mencoder and mediatomb

On Fri, 18 Jul 2008, Alex Samad wrote:

>>> I have come up with this as a real time command line for mencoder
>>>
>>> mencoder %in -o %out -oac mp3lame -ovc lavc -lavcopts
>>> vcodec=mpeg2video -af volnorm

>> Encoding to MP3 with lame is certainly CPU-intensive, using aq=9 will
>> make it faster.

High values for aq don't seem to have very dramatic results with VBR
encoding. Out of curiosity, I did some ad hoc benchmarking based on your
original encoding command and came up with the following (using the "all
defaults" user time as a reference):

Options T/Tr
---------------------------------------------
-oac mp3lame 1.000
-oac mp3lame -lameopts aq=9 0.954
-oac mp3lame -lameopts cbr:br=128 0.880
-oac mp3lame -lameopts cbr:br=128:aq=9 0.544
-oac pcm 0.439
-oac mp3lame -lameopts cbr:br=128:aq=9 0.437
-lavcopts ...keyint=1
-oac pcm -lavcopts ...keyint=1 0.333

> So I am guessing pcm would be eaier

If you have bandwidth to spare, go for it.
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