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Topic: q6 not 192 anymore (Read 4757 times) previous topic - next topic
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q6 not 192 anymore

i dont know what happened.. but from one rip to the next one, without chaninging anything my q6 rips get around 210 - 230 kbit ....

i tried to use a different encoder , but still the same.. with whatever cd i am using...

q6 not 192 anymore

Reply #1 –
It's VBR. What size you'll get depends a lot on what you're encoding. The nominal bitrate is just a rough guideline.

--
GCP

q6 not 192 anymore

Reply #2 –
well, my rips always were around 190k.. vbr does not mean its randon
it will always stick around the bitrate and try to be as close as possible while using as much/less bits as possible for the music...  but as i said its with every cd now...

q6 not 192 anymore

Reply #3 –
I assume you think that since you saw the bitrate in winamp during playback. The problem is in winamp plugin or maybe in winamp itself. It just does not display the real bitrate properly, the real value is a little lower. Choose "file info" from the playlist (Alt + 3) and you'll see the real average bitrate. Or you can calculate the average bitrate from duration and filesize.

q6 not 192 anymore

Reply #4 –
Quote
Originally posted by Rasi
well, my rips always were around 190k.. vbr does not mean its randon
it will always stick around the bitrate and try to be as close as possible while using as much/less bits as possible for the music...  but as i said its with every cd now...


That's the description suitable for ABR[/b] not VBR. VBR will use any bitrate it is necessary to keep given quality, not to stick around given bitrate. It'll keep it as small as possible for given quality, without taking care if average is getting smaller or larger than nominal bitrate.

Messer

q6 not 192 anymore

Reply #5 –
Still, strange if suddenly all encodes got bigger than usual.

Below graph made recently, shows bitrates with various encoders and preset/quality settings, of an 'average' pop compilation album, ripped to a single file.
mp3 lame 3.92 (Mitiok), mpc v1.1, ogg v1.0, aac Psytel v2.15.

Hans



Edit: Resized the graph a bit, added --alt-preset standard

q6 not 192 anymore

Reply #6 –
Quote
Originally posted by Rasi
it will always stick around the bitrate and try to be as close as possible while using as much/less bits as possible for the music...  but as i said its with every cd now...
vbr doesnt try to be as close as possible to some bitrate. Totally flexible vbr like Vorbis' is quality based, meaning simplified that the quality will be defined by calculated masking threshold. With certain quality settings bitrates tends to be on average something nominal, but it doesn't try to be as close as possible to any certain bitrate.
Juha Laaksonheimo

q6 not 192 anymore

Reply #7 –
Great to see that you seem to be back Hans!
Juha Laaksonheimo

q6 not 192 anymore

Reply #8 –
-q 6 with Vorbis 1 has around the same behaviour on the files which I've encoded as in previous versions: lower than 192 on easy files, higher on hard files.

I've encoded a little under half my CDs now, so here's a histogram of -q 6 bitrates on the 1073 -q 6 files I've created so far:

Code: [Select]
 90 .
100 .
110
120 .
130 .
140 ***
150 *********
160 ************************
170 *************************** ************************
180 *************************** ********************************
190 *************************** *****
200 ************
210 *
220 *
230 .
240 .
250
260 .

(I had to insert some random spaces, otherwise VBulletin helpfully word wraps it for me)
The mean of all the averages is around 180.75 kbits/s.

Perhaps the music I have is just easier to encode than yours
 

q6 not 192 anymore

Reply #9 –
Ok Jon, glad to see that my test-CD, with 185 k for ogg -q6,  does not differ much from your average.

To JohnV: yes it looked like I was gone, but not really because I checked the various audio forums often!