Re: VARIABLE BIT RATES WITH LAME, SOME NOTES
the file size. This option sets the criteria used to determine when to increase the bit-rate for a frame. The lower the number, the lower the criteria will be. Thus VBR_0 will yield the best quality (but the largest file size) while VBR_9 will have less sound quality but the file size will be the smallest. The recommended variable bit-rate option is VBR_4. If you don't want VBR encoding, set this option to None. Private When enabled, it will set the private flag in the MP3 stream. Original When enabled, it will set the original flag in the MP3 stream. Copyright When enabled, it will set the copyright flag in the MP3 stream. Checksum When enabled, it will add a cyclic redundancy check (CRC) code in each frame, allowing [the decoding software] to detect transmission errors that could occur on the MP3 stream. However, it takes 16 bits per frame that would otherwise be used for encoding, and therefore will slightly (probably imperceptibly) reduce the sound quality. E-mail: [EMAIL PROTECTED] MSN: [EMAIL PROTECTED] - Original Message - From: Dane Trethowan [EMAIL PROTECTED] To: PC audio discussion list. [EMAIL PROTECTED] Sent: Thursday, September 02, 2004 8:00 AM Subject: Re: VARIABLE BIT RATES WITH LAME, SOME NOTES -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Ok! well I have a comment to make on this subject. What you said below seems very general, I mean their are different things that people may want to encode, (music and speech for example) and (from what I understand) ABR will not work too well with music (VBR is supposed to work better) so you can see my concern when a manual for a product recommends one form of encoding over another in this way, if the manual actually provides some background information as to why the recommendation is made then fare enough. Secondly, without casting any doubts or making any criticisms towards CDEX, I ask the question, just how old is the manual we're referring to. Its over 18 months since I've used CDEX and allot has changed in that period of time with LAME, allot of work has gone into improving the whole LAME software so what the manual says about LAME may not be accurate any longer, of course (me having not used CDEX for such a long time, I've lost touch and (for all I know) their may ahve been subsequent update releases of CDEX too!). Now ABR and VBR, 2 very different systems. ABR works out the average bit rate of a file and encodes it that way where as VBR works on each frame of the file and encodes each frame to the best bit rate appropriate to that frame, if you have silence then encoding drops down to the minimum set (by default this is 32KBPS). The settings I spoke of in my original message were designed to get maximum compression and quality using VBR, if the quality setting is either too high or too low you either end up with a small file of lousy quality or a massive file of good quAlity audio, people are under the impression that (with the VBR method) the higher the quality number the better the quality encoding so I was just making the point that the quality setting doesn't work as simply as that. 01:55 AM 2/09/2004 -0400, you wrote: Hi all. I hear in the CDex manual that abr is maybe better than vbr. If you use variable bit rate, you should use the average bit rate, or abr. - Original Message - From: Dane Trethowan [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Wednesday, September 01, 2004 7:18 AM Subject: VARIABLE BIT RATES WITH LAME, SOME NOTES -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Greetings! Sorry! I'm all over the place with e-mail at the moment. Some time ago, someone on list asked about VBR quality with LAME, they said that they were getting mixed results with a quality figure of 9. This will indeed be the case as (with the VBR encoding) 9 is the worst quality you can use. The quality for VBR encoding is slightly different to that of Constant bit rate encoding, the quality setting for VBR encoding affects both the encoded audio nad the size of the file thus the best quality figure is probably about 5, where you get maximum quality and maximum compression. LAME boasts 2 VBR methods, OLD and NEW, NEW, is very fast but doesn't produce as good a results as does OLD, which is considerably slower. Naturally! this situation will change as time goes on. -BEGIN PGP SIGNATURE- Version: PGP 8.0.3 Comment: Dane Trethowan, a client of TFT-BBS run by Gordon Smith iQA/AwUBQTWv/SlBPqY64aUBEQKe9wCgzRz2ovd02UaAewsN5eY0A4cVmsgAoOU7 P+lBFteSR0VToI4YkfrZz8ae =Dv1v -END PGP SIGNATURE- ___ PC-Audio List Help, Guidelines, Archives and more... http://www.pc-audio.org To unsubscribe from this list, send a blank email to: [EMAIL
Re: VARIABLE BIT RATES WITH LAME, SOME NOTES
Hi Dane. Well it seems like when you go to variable bit rate settings, it did go from 0 to 9. I used to use 9, but think better of that now, so for now, I'll go to 5, but there is a place in CDex where it says vbr-abr, or something like that. Maybe someone who uses CDex could explain it better. - Original Message - From: Dane Trethowan [EMAIL PROTECTED] To: PC audio discussion list. [EMAIL PROTECTED] Sent: Thursday, September 02, 2004 3:00 AM Subject: Re: VARIABLE BIT RATES WITH LAME, SOME NOTES -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Ok! well I have a comment to make on this subject. What you said below seems very general, I mean their are different things that people may want to encode, (music and speech for example) and (from what I understand) ABR will not work too well with music (VBR is supposed to work better) so you can see my concern when a manual for a product recommends one form of encoding over another in this way, if the manual actually provides some background information as to why the recommendation is made then fare enough. Secondly, without casting any doubts or making any criticisms towards CDEX, I ask the question, just how old is the manual we're referring to. Its over 18 months since I've used CDEX and allot has changed in that period of time with LAME, allot of work has gone into improving the whole LAME software so what the manual says about LAME may not be accurate any longer, of course (me having not used CDEX for such a long time, I've lost touch and (for all I know) their may ahve been subsequent update releases of CDEX too!). Now ABR and VBR, 2 very different systems. ABR works out the average bit rate of a file and encodes it that way where as VBR works on each frame of the file and encodes each frame to the best bit rate appropriate to that frame, if you have silence then encoding drops down to the minimum set (by default this is 32KBPS). The settings I spoke of in my original message were designed to get maximum compression and quality using VBR, if the quality setting is either too high or too low you either end up with a small file of lousy quality or a massive file of good quAlity audio, people are under the impression that (with the VBR method) the higher the quality number the better the quality encoding so I was just making the point that the quality setting doesn't work as simply as that. 01:55 AM 2/09/2004 -0400, you wrote: Hi all. I hear in the CDex manual that abr is maybe better than vbr. If you use variable bit rate, you should use the average bit rate, or abr. - Original Message - From: Dane Trethowan [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Wednesday, September 01, 2004 7:18 AM Subject: VARIABLE BIT RATES WITH LAME, SOME NOTES -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Greetings! Sorry! I'm all over the place with e-mail at the moment. Some time ago, someone on list asked about VBR quality with LAME, they said that they were getting mixed results with a quality figure of 9. This will indeed be the case as (with the VBR encoding) 9 is the worst quality you can use. The quality for VBR encoding is slightly different to that of Constant bit rate encoding, the quality setting for VBR encoding affects both the encoded audio nad the size of the file thus the best quality figure is probably about 5, where you get maximum quality and maximum compression. LAME boasts 2 VBR methods, OLD and NEW, NEW, is very fast but doesn't produce as good a results as does OLD, which is considerably slower. Naturally! this situation will change as time goes on. -BEGIN PGP SIGNATURE- Version: PGP 8.0.3 Comment: Dane Trethowan, a client of TFT-BBS run by Gordon Smith iQA/AwUBQTWv/SlBPqY64aUBEQKe9wCgzRz2ovd02UaAewsN5eY0A4cVmsgAoOU7 P+lBFteSR0VToI4YkfrZz8ae =Dv1v -END PGP SIGNATURE- ___ PC-Audio List Help, Guidelines, Archives and more... http://www.pc-audio.org To unsubscribe from this list, send a blank email to: [EMAIL PROTECTED] ___ PC-Audio List Help, Guidelines, Archives and more... http://www.pc-audio.org To unsubscribe from this list, send a blank email to: [EMAIL PROTECTED] -BEGIN PGP SIGNATURE- Version: PGP 8.0.3 Comment: Dane Trethowan, a client of TFT-BBS run by Gordon Smith iQA/AwUBQTbFEilBPqY64aUBEQKnYgCg8m+1HlZOdMXrJg+wMYvn5qqO1zwAnjlq FP2HtteoFEwCuDcauS7UuKTX =FJ8D -END PGP SIGNATURE- ___ PC-Audio List Help, Guidelines, Archives and more... http://www.pc-audio.org To unsubscribe from this list, send a blank email to: [EMAIL PROTECTED] ___ PC-Audio List Help, Guidelines, Archives and more... http://www.pc-audio.org To unsubscribe from this list, send a blank email to: [EMAIL PROTECTED]
Re: VARIABLE BIT RATES WITH LAME, SOME NOTES
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Ok! well I have a comment to make on this subject. What you said below seems very general, I mean their are different things that people may want to encode, (music and speech for example) and (from what I understand) ABR will not work too well with music (VBR is supposed to work better) so you can see my concern when a manual for a product recommends one form of encoding over another in this way, if the manual actually provides some background information as to why the recommendation is made then fare enough. Secondly, without casting any doubts or making any criticisms towards CDEX, I ask the question, just how old is the manual we're referring to. Its over 18 months since I've used CDEX and allot has changed in that period of time with LAME, allot of work has gone into improving the whole LAME software so what the manual says about LAME may not be accurate any longer, of course (me having not used CDEX for such a long time, I've lost touch and (for all I know) their may ahve been subsequent update releases of CDEX too!). Now ABR and VBR, 2 very different systems. ABR works out the average bit rate of a file and encodes it that way where as VBR works on each frame of the file and encodes each frame to the best bit rate appropriate to that frame, if you have silence then encoding drops down to the minimum set (by default this is 32KBPS). The settings I spoke of in my original message were designed to get maximum compression and quality using VBR, if the quality setting is either too high or too low you either end up with a small file of lousy quality or a massive file of good quAlity audio, people are under the impression that (with the VBR method) the higher the quality number the better the quality encoding so I was just making the point that the quality setting doesn't work as simply as that. 01:55 AM 2/09/2004 -0400, you wrote: Hi all. I hear in the CDex manual that abr is maybe better than vbr. If you use variable bit rate, you should use the average bit rate, or abr. - Original Message - From: Dane Trethowan [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Wednesday, September 01, 2004 7:18 AM Subject: VARIABLE BIT RATES WITH LAME, SOME NOTES -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Greetings! Sorry! I'm all over the place with e-mail at the moment. Some time ago, someone on list asked about VBR quality with LAME, they said that they were getting mixed results with a quality figure of 9. This will indeed be the case as (with the VBR encoding) 9 is the worst quality you can use. The quality for VBR encoding is slightly different to that of Constant bit rate encoding, the quality setting for VBR encoding affects both the encoded audio nad the size of the file thus the best quality figure is probably about 5, where you get maximum quality and maximum compression. LAME boasts 2 VBR methods, OLD and NEW, NEW, is very fast but doesn't produce as good a results as does OLD, which is considerably slower. Naturally! this situation will change as time goes on. -BEGIN PGP SIGNATURE- Version: PGP 8.0.3 Comment: Dane Trethowan, a client of TFT-BBS run by Gordon Smith iQA/AwUBQTWv/SlBPqY64aUBEQKe9wCgzRz2ovd02UaAewsN5eY0A4cVmsgAoOU7 P+lBFteSR0VToI4YkfrZz8ae =Dv1v -END PGP SIGNATURE- ___ PC-Audio List Help, Guidelines, Archives and more... http://www.pc-audio.org To unsubscribe from this list, send a blank email to: [EMAIL PROTECTED] ___ PC-Audio List Help, Guidelines, Archives and more... http://www.pc-audio.org To unsubscribe from this list, send a blank email to: [EMAIL PROTECTED] -BEGIN PGP SIGNATURE- Version: PGP 8.0.3 Comment: Dane Trethowan, a client of TFT-BBS run by Gordon Smith iQA/AwUBQTbFEilBPqY64aUBEQKnYgCg8m+1HlZOdMXrJg+wMYvn5qqO1zwAnjlq FP2HtteoFEwCuDcauS7UuKTX =FJ8D -END PGP SIGNATURE- ___ PC-Audio List Help, Guidelines, Archives and more... http://www.pc-audio.org To unsubscribe from this list, send a blank email to: [EMAIL PROTECTED]
VARIABLE BIT RATES WITH LAME, SOME NOTES
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Greetings! Sorry! I'm all over the place with e-mail at the moment. Some time ago, someone on list asked about VBR quality with LAME, they said that they were getting mixed results with a quality figure of 9. This will indeed be the case as (with the VBR encoding) 9 is the worst quality you can use. The quality for VBR encoding is slightly different to that of Constant bit rate encoding, the quality setting for VBR encoding affects both the encoded audio nad the size of the file thus the best quality figure is probably about 5, where you get maximum quality and maximum compression. LAME boasts 2 VBR methods, OLD and NEW, NEW, is very fast but doesn't produce as good a results as does OLD, which is considerably slower. Naturally! this situation will change as time goes on. -BEGIN PGP SIGNATURE- Version: PGP 8.0.3 Comment: Dane Trethowan, a client of TFT-BBS run by Gordon Smith iQA/AwUBQTWv/SlBPqY64aUBEQKe9wCgzRz2ovd02UaAewsN5eY0A4cVmsgAoOU7 P+lBFteSR0VToI4YkfrZz8ae =Dv1v -END PGP SIGNATURE- ___ PC-Audio List Help, Guidelines, Archives and more... http://www.pc-audio.org To unsubscribe from this list, send a blank email to: [EMAIL PROTECTED]
