MPEG1 cannot handle "heavy editing" at DVinfo.net

Greg Jacobson · February 14th, 2005, 03:14 PM

I read posts about people saying that the MPEG1 audio is fine but cannot handle "heavy editing".

Could someone please enlighten me as to what would constitute heavy editing?

Douglas Spotted Eagle · February 14th, 2005, 03:52 PM

Any sort of processing is going to degrade the information further. It's important that you convert to an intermediate format such as wav or aiff as soon as you've captured. Cineform muxes this as a pcm format when you capture, I'm not sure how Lumeire does it, but once it's converted, for the most part you'll be just fine.

Greg Jacobson · February 14th, 2005, 09:57 PM

DSE, you used the word "muxes" when you said that Cineform converts to PCM. So am I correct in understanding that this is not ideal? Not sure if I am following you on that one.

Also, after you convert to a wav file it is ok to edit the audio without degrading it or are you saying that it is degraded only you leave it in mpeg1?

thanks

Ignacio Rodriguez · February 15th, 2005, 09:02 AM

I think what he meant is that Cineform demuxes the stream and audio gets written to a seperate linear file. Mux and demux are terms that come from the telecom industry, and they refer to multiplexing, which is the combination of various signals into a single signal, and demultiplexing which means going the other way around.

David Newman · February 15th, 2005, 10:30 AM

<<<-- Originally posted by Greg Jacobson : DSE, you used the word "muxes" when you said that Cineform converts to PCM. So am I correct in understanding that this is not ideal? -->>>

Techinically it is ideal. Demultiplex and decompressed audio is stored in a 16bit lossless form, this is the form is must be in if your are to hear it and make any enhancements.

Greg Jacobson · February 15th, 2005, 09:37 PM

<<<-- Originally posted by David Newman : <<<-- Originally posted by Greg Jacobson : DSE, you used the word "muxes" when you said that Cineform converts to PCM. So am I correct in understanding that this is not ideal? -->>>

Techinically it is ideal. Demultiplex and decompressed audio is stored in a 16bit lossless form, this is the form is must be in if your are to hear it and make any enhancements. -->>>

Ok thanks David, Looks like I am going with the Premeire Pro bundle with the Aspect HD. As I understand it, I also get to use Connect HD with Vegas if I buy Aspect HD. That is what I read in the forum on your site.

David Newman · February 15th, 2005, 10:56 PM

That is correct, Connect HD is a subset of Aspect HD (AHD has all of CHD plus much more.)

February 14th, 2005, 03:14 PM	#1
Greg Jacobson Regular Crew Join Date: Feb 2005 Location: New York Posts: 141	MPEG1 cannot handle "heavy editing" I read posts about people saying that the MPEG1 audio is fine but cannot handle "heavy editing". Could someone please enlighten me as to what would constitute heavy editing?

February 14th, 2005, 03:52 PM	#2
Douglas Spotted Eagle VASST Join Date: Jan 2004 Location: Stockton, UT Posts: 5,648	Any sort of processing is going to degrade the information further. It's important that you convert to an intermediate format such as wav or aiff as soon as you've captured. Cineform muxes this as a pcm format when you capture, I'm not sure how Lumeire does it, but once it's converted, for the most part you'll be just fine. __________________ Douglas Spotted Eagle/Spot Author, producer, composer Certified Sony Vegas Trainer http://www.vasst.com

February 15th, 2005, 09:02 AM	#4
Ignacio Rodriguez Contributor Join Date: Sep 2003 Location: Santiago, Chile Posts: 932	I think what he meant is that Cineform demuxes the stream and audio gets written to a seperate linear file. Mux and demux are terms that come from the telecom industry, and they refer to multiplexing, which is the combination of various signals into a single signal, and demultiplexing which means going the other way around. __________________ Ignacio Rodríguez in the third world. @micronauta on Twitter. Main hardware: brain, eyes, hands.

February 15th, 2005, 10:30 AM	#5
David Newman CTO, CineForm Inc. Join Date: Jul 2003 Location: Cardiff-by-the-Sea, California Posts: 8,095	<<<-- Originally posted by Greg Jacobson : DSE, you used the word "muxes" when you said that Cineform converts to PCM. So am I correct in understanding that this is not ideal? -->>> Techinically it is ideal. Demultiplex and decompressed audio is stored in a 16bit lossless form, this is the form is must be in if your are to hear it and make any enhancements. __________________ David Newman -- web: www.gopro.com blog: cineform.blogspot.com -- twitter: twitter.com/David_Newman

February 15th, 2005, 10:56 PM	#7
David Newman CTO, CineForm Inc. Join Date: Jul 2003 Location: Cardiff-by-the-Sea, California Posts: 8,095	That is correct, Connect HD is a subset of Aspect HD (AHD has all of CHD plus much more.) __________________ David Newman -- web: www.gopro.com blog: cineform.blogspot.com -- twitter: twitter.com/David_Newman

February 14th, 2005, 09:57 PM	#3
Greg Jacobson Regular Crew Join Date: Feb 2005 Location: New York Posts: 141	DSE, you used the word "muxes" when you said that Cineform converts to PCM. So am I correct in understanding that this is not ideal? Not sure if I am following you on that one. Also, after you convert to a wav file it is ok to edit the audio without degrading it or are you saying that it is degraded only you leave it in mpeg1? thanks

February 15th, 2005, 09:37 PM	#6
Greg Jacobson Regular Crew Join Date: Feb 2005 Location: New York Posts: 141	<<<-- Originally posted by David Newman : <<<-- Originally posted by Greg Jacobson : DSE, you used the word "muxes" when you said that Cineform converts to PCM. So am I correct in understanding that this is not ideal? -->>> Techinically it is ideal. Demultiplex and decompressed audio is stored in a 16bit lossless form, this is the form is must be in if your are to hear it and make any enhancements. -->>> Ok thanks David, Looks like I am going with the Premeire Pro bundle with the Aspect HD. As I understand it, I also get to use Connect HD with Vegas if I buy Aspect HD. That is what I read in the forum on your site.