[MPlayer-users] Audio encoding speed?

Jack lt at speakeasy.net
Mon Feb 14 20:13:00 CET 2005


Josef Wolf wrote:

>>>PS: I can not find an equivalent to the aq=0 option in lame's options.
>>>  What does this aq=0 mean?
>>>      
>>>
>>It is equal to -q 0 on the lame command line.
>>    
>>
>
>I find it somewhat confusing that aq=0 corresponds to -q0 and q=0
>corresponds to yet another wired option =:).  And how do I specify
>lame's -V0 option?
>
>  
>
q=0.  Confused yet?

>>>BTW: I noticed that the dumped mp2 file is even shorter than the
>>>   resulting mp3 file (154MB vs. 166MB).  So I wondered whether it is
>>>   really worth to reencode the audio. 
>>>
>>>      
>>>
>>No, no it isn't worth it.  Reencoding like this would be totally 
>>pointless, and just lose more quality.  If you gain some space by 
>>reencoding to VBR or to a lower bitrate, that would be worth it.
>>    
>>
>
>But the dumped mp2 file seems to be broken (I noted in my prevoius mail
>that mpg123 can't play it), so I guess it is worth to reencode just to get
>a non-broken file.
>
>  
>
It's probably not playable because it's not in a container of any usable 
sort.  If you use -oac copy, you should be able to copy the (working) 
original audio stream to the new file. Only if this doesn't work should 
you re-encode.

-jack




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