Re: problem encoding with lame / vorbis settings

Hans Hermans <[email protected]> writes:

>>I am having a problem encoding with lame; ripping with cdparanoia works like a charm, but when files are encoded they turn into 128 bit mp3s. The command line I wish to use is:
>>
>>--alt-preset extreme -q 0 -V 0 -m s
>>    
>>
What is your LAME version? I can't reproduce your 128 bit error, but I
can encode MP3 in Grip with your command line when I trail it with %w %m :

Encoder executable:
/usr/bin/lame

Encoder command-line:
--alt-preset extreme -q 0 -V 0 -m s %w %m

Incidentally...

* The "-q 0" setting has been changed (I think a few times, to an
"experimental" setting) since LAME version 3.90, and may not do what you
think it does. (And no this isn't well documented.) Nothing wrong with
experimenting, but if you're after maximum quality, LAME "-q" settings
aren't worth the trouble.

* "-m s" can introduce errors at extremely high bitrates -- joint
stereo, when properly implemented (e.g., in LAME), really is a good idea.

more on joint stereo: http://tinyurl.com/cb8kq
recommended LAME settings: http://tinyurl.com/4gc8a

(My apologies if this is stuff you already know.)

My current LAME parameters in Grip:
--alt-preset extreme --tt "%n" --ta "%a" --tl "%d" --ty "%y" --tn "%t"
--tg "%g" %w %m

>I'm also wondering if any one knows how to encode with oggenc to the equivalent of this lame encoding I am attempting (vbr, extreme, stereo)?
>  
>
I'm not aware of a vorbis setting that forces non-joint stereo.

Sebastian Tennant wrote:

>oggenc only does VBR and provides a simple quality switch ranging
>from -1 (worst) to 10 (best).
> 
>  $ oggenc -q 10 file.wav
>  
>
Yes, except q10 is overkill, at least for 44.1kHz  stereo (i.e. a CD).
q7 (give or take) should be bitrate-comparable to lame "extreme". If you
wanna go higher than that, you might consider a non-lossy codec, such as
FLAC.

My vorbis settings:

Encoder executable:
/usr/bin/oggenc-gt3

Encoder command-line:
-q 6 -a %a -l %d -t %n -c "tracknumber=%t" -c "genre=%G" -d %y -c
"ENCODER=Grip (cdparanoia > oggenc-gt3 q6)" -c "SOURCEMEDIA=CD" -o %m %w

Someone at hydrogenaudio.org recommends this setting:
oggenc -q 6 --advanced-encode-option impulse_trigger_profile=5

Don't ask me what that all means.

I use oggenc-gt3 to encode q5 or better, and oggenc-aotuv to encode < q5
. I encode Ogg for my own use, MP3 for benighted friends.

Es.


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