[MEncoder-users] mencoder and mediatomb

[Reimar Döffinger]

Hello,
On Fri, Jul 18, 2008 at 05:48:22PM -0500, R.L. Horn wrote:
> 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.

Note that extra bandwidth also means extra CPU usage since for transfer
with most Ethernet cards the data must first be copied to the kernel,
headers must be added, CRCs calculated, so using PCM might not save any
overall CPU usage in that case...