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wormdp Profile
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Purple fan

Registered: 09-2003
Posts: 352
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Re: Custom 1984 Reunion DVD


Why would you want to encode mpegs ?

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22/6/2004, 3:08 Link to this post Send Email to wormdp   Send PM to wormdp
 
rijir Profile
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Purple fan

Registered: 05-2004
Posts: 882
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Re: Custom 1984 Reunion DVD


>Why would you want to encode mpegs ?

To be DVD compliant video files must be in Mpeg1 or 2 at the correct ratio.

Russ
22/6/2004, 3:29 Link to this post Send Email to rijir   Send PM to rijir
 
mrsnip Profile
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Mr. Black Hat

Registered: 11-2003
Posts: 3352
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Re: Custom 1984 Reunion DVD


quote:

rijir wrote:

>Why would you want to encode mpegs ?

To be DVD compliant video files must be in Mpeg1 or 2 at the correct ratio.

Russ



Isn't mpeg (whatever #) just a PC compatible file, created by ripping and throwing away data, of the optimal thing?
22/6/2004, 8:09 Link to this post Send Email to mrsnip   Send PM to mrsnip
 
rijir Profile
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Purple fan

Registered: 05-2004
Posts: 882
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Re: Custom 1984 Reunion DVD


You are correct. Any MPEG# does throw away data. But you cannot create a true to spec playable DVD without MPEG1 or 2 files. All comercial DVDs are encoded in MPEG2. It's just the way to go. DV or AVI files are too large. I have a DP clip that is 4 min long and encoded in DV format. It is over 3GB in size. And this is only playable on a PC.

Anyone interested in the technical stuff regarding DVDs and creating them will love this site:

www.dvdrhelp.com

Russ
22/6/2004, 14:08 Link to this post Send Email to rijir   Send PM to rijir
 
wormdp Profile
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Purple fan

Registered: 09-2003
Posts: 352
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Re: Custom 1984 Reunion DVD


The way I understand it is that MPEG 2 is DVD compliant. MPEG 1 is a lower grade quality and is used for such things as a VCD. Encoding of any type takes away information and makes the picture quality poor. Same thing when the use of compression is used to "fit" all of the original source on a DVD. Encoding is very simular to MP3, not something you should use. In bootleg collecting MP3, encoding and compression are bad words. It is bad for the hobbie because every time the item gets traded and someone uses one of these "compression" helpers, the quality gets downgraded. Then we are in search of the "best" source all over again. We live in a digital age were generation after generation could go on forever. But we have these "helpers" to create more space. These programs are not "helpful" if we want to keep our sources in an original form. I know not everyone has unlimited space for their hobbie. And this is why we run into trouble like this. DVD burner traders, specially now, should not be trying to make several shows "fit" or cram as much information onto a DVD as they can. Compression of the video signal only makes things worse. In fact never transfer NTSC material to PAL. It can go the other way (PAL to NTSC) but to go this way creates a very poor image.

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22/6/2004, 14:09 Link to this post Send Email to wormdp   Send PM to wormdp
 
rijir Profile
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Purple fan

Registered: 05-2004
Posts: 882
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Re: Custom 1984 Reunion DVD


I totally agree that MPEG is a lossy compressor. No doubt. I believe that when compliing a project like this we should trade the files in DV format saved onto DVDRs. Most of the stuff that would go on a custom DVD sould be clips 1 to 5 min in length. And these will fit on DVDRs. And only in the very end should the material be encoded in the final process to fit the DVD. Up until then all capturing, editing, cleaning up, etc should be done in a lossless DV format to preserve it's quality.

Many people consider it archiving to save their precious wedding videos etc. to DVDRs. They are so wrong.

Russ
22/6/2004, 15:21 Link to this post Send Email to rijir   Send PM to rijir
 
mrsnip Profile
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Mr. Black Hat

Registered: 11-2003
Posts: 3352
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Re: Custom 1984 Reunion DVD


quote:

wormdp wrote:

 In bootleg collecting MP3, encoding and compression are bad words. It is bad for the hobbie because every time the item gets traded and someone uses one of these "compression" helpers



I'd like to put a veto against the term compression, when talking about mp3. Mp3 is raping. In my terminology (I know I am one of the few left) compression is reversible, raping ain't. Zip/shn/flac/ape is compression, you get the exact same file back when you decompress.


22/6/2004, 15:42 Link to this post Send Email to mrsnip   Send PM to mrsnip
 
wormdp Profile
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Purple fan

Registered: 09-2003
Posts: 352
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Re: Custom 1984 Reunion DVD


Actually when you talk about compression in the video relm, there is no turning back. In audio, I whole heartly agree, most audio compression will return most of the original signal. It is always best to keep the sources as pure as possible.

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23/6/2004, 11:44 Link to this post Send Email to wormdp   Send PM to wormdp
 
mrsnip Profile
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Mr. Black Hat

Registered: 11-2003
Posts: 3352
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Re: Custom 1984 Reunion DVD


quote:

wormdp wrote:

Actually when you talk about compression in the video relm, there is no turning back.




I know the standard term is compression, though it is quite unreasonable. The term compression should never have been applied. It's only confusing, becaue it's not compression, but raping/transformation.

quote:


  In audio, I whole heartly agree, most audio compression will return most of the original signal. It is always best to keep the sources as pure as possible.



In audio it goes wrong when you rip the cd to wav. You will never get 2 exact wave files out of the same track of a cd. That's why never to download compressed (not mp3) files, decompress and then burn them, and then rip the cd. With "serious" traders you can really get your ass kicked if you do. Some won't even accept cd's copied with the standard cd-burning software, but only if EAC is used, and then used properly.
23/6/2004, 12:17 Link to this post Send Email to mrsnip   Send PM to mrsnip
 
wormdp Profile
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Purple fan

Registered: 09-2003
Posts: 352
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Re: Custom 1984 Reunion DVD


I don't even want to get into EAC's problem. Yes it is very acurate, and free, that's why it is mostly excepted as "the best". But the complete WAV file argument I have never heard before. I do know that you should never burn over 4X and on older computers, never more than 1X. Do you have any web pages that I could look over this WAV problem ? As far as I have ever read, WAV is the purist form there is. I have never heard that a WAV file could be different each time it is recorded.

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23/6/2004, 13:17 Link to this post Send Email to wormdp   Send PM to wormdp
 


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