Text 10345, 104 rader
Skriven 2006-03-26 14:34:42 av Rich Gauszka (1:379/45)
  Kommentar till text 10324 av Glenn Meadows (1:379/45)
Ärende: Re: Questions Re: Audio Ripping
=======================================
From: "Rich Gauszka" <gauszka@hotmail.com>

This may be a dumb question but I've seen some quotes like those at the link
below that give priority to VBR. Is this a bit of misinformation?

http://www.mp3machine.com/news/842/

Constant Bit Rate (CBR) encoding means that you encode a file at a fixed rate,
such as 128 Kpbs. For many people this is a common method of encoding MP3s. You
can usually tell CBR files because they have consistent file sizes and sound
quality. OK, file sizes aren't the kind of thing most of you will look out for.
We know that.
Variable Bit Rate (VBR) encoding is a method that ensures high audio quality
bit-allocation decisions during encoding. The encoder allocates an appropriate
amount of data per second, depending on the complexity of the audio file.

If there are very complex parts in a song it will use a quite high bit rate and
a lower bitrate for something such as silence. The average bit rate may not be
as high as the bitrate of an MP3 of the same quality with constant bitrate.

You should use VBR encoding when consistent audio quality is the top priority.

"Glenn Meadows" <gmeadow@comcast.net> wrote in message news:4425aa73$1@w3....
> WinLame is a good wrapper around the basic encoder, I use it all the time
> to make MP3's we ship to radio.  320kb/sec fixed rate.
>
> --
>
> Glenn M.
> "Mike '/m'" <mike@barkto.com> wrote in message
> news:nhj622t9l6scnsbdedebl0pfea8gcfqf3v@4ax.com...
>>
>> LAME is reputed to be very good for lossy ripping at the higher
>> bitrates, some say the best.
>>
>> http://lame.sourceforge.net/
>>
>>  /m
>>
>> On Wed, 22 Mar 2006 23:22:38 -0500, "Gary Britt"
>> <email@from_Gary_Britt.org> wrote:
>>
>>>How up to date is the LAME encoder?  I've got a Creative PlayCenter 2
>>>software encoder from a 3 year old Sound Blaster Live card in one of my
>>>machines, Windows Media Player 10 in my new XP laptop, and also what Nero
>>>6
>>>and 7 come with.  How does LAME compare to these?
>>>
>>>Anybody have any thoughts on if it makes much difference what software
>>>encoder is used to do the ripping?
>>>
>>>Thanks,
>>>
>>>Gary
>>>
>>>"Mike '/m'" <mike@barkto.com> wrote in message
>>>news:1lq3229dcmdkcruidcnk24tnqjmjqrslki@4ax.com...
>>>>
>>>> I ripped at 320kbps constant bitrate, joint stereo, using the LAME
>>>> encoder.  I would have ripped lossless if I had enough disk space.
>>>>
>>>> I use CDex for ripping, and I set the error detection and correction to
>>>> its maximum ("Paranoia, Full").  CDex tells you, on a per-track basis,
>>>> how many errors it could not correct.   Out of about 2,000 CDs (26,000+
>>>> songs) I ripped, I'd say there were about 50 tracks that had
>>>> uncorrectable errors, usually 1 or 2 per track.
>>>>
>>>> I had 4 CD drives running the ripping.  Two on my main PC (dual-CPU,
>>>> 500MHz Pentium 2 or 3), 515MB RAM.  Another on my notebook (500MHZ CPU
>>>> (Pentium 2, 512MB), and another on a junker (probably a 400MHz Pentium
>>>> something or other, with 256 MB memory).   All were running Windows
>>>> 2000.
>>>>
>>>>   /m
>>>>
>>>>
>>>> On Wed, 22 Mar 2006 15:12:53 -0500, "Gary Britt"
>>>> <email@from_Gary_Britt.org> wrote:
>>>>
>>>> >When ripping an audio CD to MP3 file format is it better to use
>>>> >constant
>>>bitrate or variable bitrate?  What about if you are ripping to WMA file
>>>format.  Is it better to use constant bitrate or variable bitrate?
>>>> >
>>>> >When doing the ripping the CD ripper I set up auto configured for
>>>> >digital
>>>extraction and NO error correction.  Question:  Should I turn error
>>>correction on for audio CD ripping?  Does error correction make much
>>>difference during ripping to MP3/WMA files?
>>>> >
>>>> >What if I'm doing the audio CD ripping on a 500mhz Pentium III with
>>>> >640
>>>megs of ram and Win2K, would that knowledge change any of your answers
>>>above?
>>>> >
>>>> >Thanks,
>>>> >
>>>> >Gary
>>>
>
>

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