Date: Sun, 15 Mar 1998 00:58:38 -0800 From: John-Mark Gurney <gurney_j@efn.org> To: The Hermit Hacker <scrappy@hub.org> Cc: freebsd-multimedia@FreeBSD.ORG Subject: Re: Why is it that... Message-ID: <19980315005838.32051@hydrogen.nike.efn.org> In-Reply-To: <Pine.BSF.3.96.980315043940.280Q-100000@thelab.hub.org>; from The Hermit Hacker on Sun, Mar 15, 1998 at 04:41:59AM -0400 References: <19980315001526.01926@hydrogen.nike.efn.org> <Pine.BSF.3.96.980315043940.280Q-100000@thelab.hub.org>
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The Hermit Hacker scribbled this message on Mar 15: > On Sun, 15 Mar 1998, John-Mark Gurney wrote: > > > The Hermit Hacker scribbled this message on Mar 15: > > > > > > I finally picked up a SCSI CD to pull CD-DA tracks from my CDs to convert > > > into mp3's, and am wondering why tosha reports that my mp3 should be > > > ~1.8Meg, while the result of using mpeg_musicin to convert it to an mp3 > > > works out to be almost 5Meg? > > > > > > track playing start end raw size mp3 size # of > > > number time sector sector in bytes 44 kbps frames > > ^^ > > > 1 5:41'25 0 25599 60211200 1877620 13067 > > > > > > Are the only tools for converting to mp3 that work under FreeBSD > > > mpeg_musicin and l3enc? Could there be enough of a difference between the > > > two to have this sort of result? > > > > because you provided a parameter that tells tosha to estimate the data > > rate of the mp3 at 44kbps... if you encode at 128kbps it will be about > > 2.9 times larger than 1.87megs... which is just over 5megs... > > Oh, okay...then I guess the next question I have to ask is "what > is thte difference"? It might be a stupid question to some, but this is > still all new to me :( well, it just means that they run at a different bit rate... of course higher bit rate has higher quality... but even the common 128kbps for mp3 can muddle up the sound from cd's... also, there is a min/max on the bit rate for layer 3... 320 is max, 32 is min... also, the one that builds out of the dist10 has a requirement (I think) of the bit rate being a multiple of 16... as for the difference... just experiment with the different bit rates, and choose the lowest that doesn't change the sound quality for you... -- John-Mark Gurney Modem Rev/FAX: +1 541 346 9237 Cu Networking P.O. Box 5693, 97405 Live in Peace, destroy Micro$oft, support free software, run FreeBSD Don't trust anyone you don't have the source for To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-multimedia" in the body of the message
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