:: --abr n
::
:: turns on encoding with a targeted average bitrate of n kbits, allowing
:: to use frames of different sizes. The allowed range of n is 4-310, you
:: can use any integer value within that range.
::
The "4" I don't understand at all.
MPEG-1 Layer III supports frame sizes
could anyone tell me what the difference is between
ABR and VBR?
(maybe a URL where I can learn
more?)
I know VBR stands for Variabele Bitrate, it means
that every MPEG-frame can have a different # kbits/sec.
Does ABR mean Average Bitrate or so?
thanx,
DataFlow
Do a search of the mail list archive where it has been discussed in
detail.
DataFlow wrote:
could anyone tell me what the difference is between ABR and VBR?(maybe
a URL where I can learn more?) I know VBR stands for Variabele
Bitrate, it means that every MPEG-frame can have a different #
I'm using/testing the parameters --abr 214 -h -k -m s -b 160
3.85 gives about 5% less average bitrate than 3.84, whats the reason for that ?
In 3.85 adding -q 1 gives the same output, in 3.84 files where different, is that ok ?
A specific file gives an average of 173kbps in 3.85 (182kbps in
So I would stick with ABR 192kbs if you are happy with CBR 192kbs.
But to guarantee every single frame of an ABR encoding is at
least as good as CBR, you would need to use "--abr 211"
(192 + 10%)
Wait a second, I don't get this. You just said that both CBR and ABR will do
most
So both ABR 192 and CBR 192 have the same worst case scenario: many
frames encoded at around 172kbs. ABR wins in the best case scenario
since it will always have extra bits avialable even if the reservoir
is empty.
So I would stick with ABR 192kbs if you are happy with CBR 192kbs.
But
ecause 211 -10% = 189.9 !
(I have a file that gives 190 average with --abr 212 -b 160)
Peter
- Original Message -
From: Ivo [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Monday, June 26, 2000 12:08 PM
Subject: Re: Sv: [MP3 ENCODER] ABR vs VBR
So both ABR 192 and CBR 192 have the same
Date: Mon, 26 Jun 2000 12:08:17 +0200
From: Ivo [EMAIL PROTECTED]
So both ABR 192 and CBR 192 have the same worst case scenario: many
frames encoded at around 172kbs. ABR wins in the best case scenario
since it will always have extra bits avialable even if the reservoir
is empty.
I normaly use -h -k -b 192 -ms for encoding. If I change -b 192 to --abr 192 i get
files with average about 180-182kbit (about 45% frames at 160 and 10% above 192). Is
the reason for this bits that was wasted in CBR before ?
If its not, which parameters should be used if you want files that
I normaly use -h -k -b 192 -ms for encoding. If I change -b 192 to
--abr 192 i get files with average about 180-182kbit (about 45% frames
at 160 and 10% above 192). Is the reason for this bits that was wasted
in CBR before ?
Here's a simplified explination of what happens in CBR:
most
Could someone just post an explanation of the differences between ABR and VBR. I
still don't understand the previous explanations completely.
Thanx
Here's yet more thoughts on all the different modes. They are based on
two different ideas about bit allocation:
1. Allocate bits based on
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