[Lame-dev] [ lame-Bugs-976923 ] CBR, VBR, ABR missing from description

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Bugs item #976923, was opened at 06/21/04 11:21
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Category: ACM
Group: None
>Status: Closed
Resolution: None
Priority: 5
Submitted By: Nobody/Anonymous (nobody)
Assigned to: Gabriel Bouvigne (bouvigne)
Summary: CBR, VBR, ABR missing from description

Initial Comment:
I'm new to this and trying to get familiar with using Lame.

I'm using the 3.95 {stable} MP3-ACM.inf in Windows 
98se by unzipping to a folder and right clicking the .inf 
and installing .

I needed to install ACM.inf so I could compress audio in 
movies using Virtualdub 1.5. 

Movie audio, etc, in Divx are sometimes in a VBR format 
and may cause sync problems as the movie plays out or 
AFTER I encode to MPEG2- SVCD, so I'm trying to use 
this to convert the wave, after uncompressing in Vdub, 
to  a CBR for accuracy at a high bitrate 48,000-to 
44,100.

It works, I just pick the highest setting, BUT there 
seems to be guesswork on my part. In Vdub, I select the 
encoder I want to use, LAME MP3, and on the right it 
gives me all the variations from 48000 to 8,000. There 
sems to be a couple thing missing. It doesn't list the 
kbps or if it is CBR, VBR or ABR. It just says:

48,000hz stereo     40kb/s   for all of the 50 or so 
settings instead of:  

48,000hz 320kbps stereo     40kbps

and at the bottom it shows Data rate 40000bytes per 
block twice for two different selections of the same HZ 
or an odd number like 39250 for two settings of the 
same.


This site, as one example, shows everything as it is 
supposed to read in step 4 
http://users.tpg.com.au/mtam/install_lame.htm

This guy has probably unchecked the ABR box in the 
codec so only CBR values show. All the other codecs in 
my system , except for like 1 or 2 are shown like this.

I'm not sure which is which, I tried removing and putting 
3.96 but it is the same. Any way to tell if it's 320 or 160 
VBR etc?

Also there is one setting at the end of the options when 
a WAVE is loaded that changes depending on the wave 
that is loaded, it might say :
44,100hz 16bit stereo  87kbps. You can't select this 
option to compress for any audio file, you get an error 
message.

Any clarification would be appreciated.


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>Comment By: SourceForge Robot (sf-robot)
Date: 11/23/05 19:20

Message:
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This Tracker item was closed automatically by the system. It was
previously set to a Pending status, and the original submitter
did not respond within 14 days (the time period specified by
the administrator of this Tracker).

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Comment By: Nobody/Anonymous (nobody)
Date: 07/05/04 01:55

Message:
Logged In: NO 

thanks for the reply. 

Is there a problem with this in Win98 and if there is, is there a 
fix? It seems to work great in my movies.

How do I know if it is CBR or VBR, by the even bytes per 
block, 40000 as to 40275 and how do you figure out the kbps 
and such using math?

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Comment By: Dmitriy Startsev (metal_man)
Date: 06/22/04 01:39

Message:
Logged In: YES 
user_id=992321

The lame ACM inplementation is messy and partially incorrect. 
Additionally, Windows 98 has no Unicode version 
implementation for some API functions (wsprintfW()), so ACM 
codec cannot generate description strings for encoding 
formats.


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