Shrink: transcode or Re-re-encode?

Stealth3si · 21st December 2005, 08:07

i have very improtant question:

i already re-encoded and compressed DVD-9 to a divx or xvid file(s) (for divx player) and they almost-perfect copies of original DVD, which i lost. But now i only have my divx files (which are XLNT qualities to begin with), and with intentions of making my own personal DVD movie with menus, I have already converted to DVD format and authored them to DVD -ready-to-burn. At this point they are same quality b'c i convert not re-encode. But movies has bigger sizes now and I need to re-compress before I finally burn. Should I transcode to shrink it or re-re-encode to shrink it?

Here is easy summary:

1.) I re-encoded and compressed DVD-9 to DiVX/XVID format (THey are XLNT qaulaity BTW)

2.) I converted, NOT re-encode, to DVD format

3.) Now with bigger size, should I transcode or re-re-encode at all?

My compresstion ratios are never down to 50% range, very rarily 60% range, sometimes 90% range, often 70-89% range. I need good time and great quality. Wathcing on widescreen TVs. Oh, I have a P2 Celeron 1.2GHz w/ 768mb ram

Thank you.

goonix · 21st December 2005, 14:36

Hi Stealth3si!

Converting from DivX/Xvid (mpeg4) to DVD format (mpeg2) is a re-encode...

If you choose a lower bitrate at this process, your movie will fit directly to a DVD and don't need to re-re-encoded again.

goonix

Stealth3si · 21st December 2005, 16:44

I see. Thank you goonix and considering your advice, you just saved me time.

Robotik · 23rd January 2006, 22:20

Well, I'm not sure who done it with what, but i have a single layer dvd containing the old Star Wars trilogy. My standalone dvd player that doesn't support divx can play it without difficulty, so i assume it is mpeg, and also there is a menu in the beginning where you can choose between the 3 movies. And the picture quality is far superior to some of the original vcd's and svcd's i have, and on my 21" tv i can't even tell it apart from a dvd. I guess the trick must be in coding only a few keyframes per minute, but i've never done any serious transcoding besides using shrink, so it's only a guesswork. Anyway, if you're interested, i can go look into it

pelmen · 15th February 2006, 21:16

you can split out the audio from the divx avi and use something like besweet to encode to ac3 and use a program that can make DVD compliant MPEG-2 files and convert your avi straight to .mpg with it (just making an MPEG-2 file is not DVD compliant). if you used DVD compliant encoder/settings then you can drop the mpg and ac3 files into a dvd authoring package and they will not have to be re-encoded to make the dvd. it will save steps and save multiple re-encodes but it may take you some practice to get the settings perfect for the mpg file to be DVD compliant (if its not the dvd authoring package will re-encode it)

21st December 2005, 08:07	#1 \| Link
Stealth3si Registered User Join Date: Nov 2005 Posts: 66	Shrink: transcode or Re-re-encode? i have very improtant question: i already re-encoded and compressed DVD-9 to a divx or xvid file(s) (for divx player) and they almost-perfect copies of original DVD, which i lost. But now i only have my divx files (which are XLNT qualities to begin with), and with intentions of making my own personal DVD movie with menus, I have already converted to DVD format and authored them to DVD -ready-to-burn. At this point they are same quality b'c i convert not re-encode. But movies has bigger sizes now and I need to re-compress before I finally burn. Should I transcode to shrink it or re-re-encode to shrink it? Here is easy summary: 1.) I re-encoded and compressed DVD-9 to DiVX/XVID format (THey are XLNT qaulaity BTW) 2.) I converted, NOT re-encode, to DVD format 3.) Now with bigger size, should I transcode or re-re-encode at all? My compresstion ratios are never down to 50% range, very rarily 60% range, sometimes 90% range, often 70-89% range. I need good time and great quality. Wathcing on widescreen TVs. Oh, I have a P2 Celeron 1.2GHz w/ 768mb ram Thank you. Last edited by Stealth3si; 21st December 2005 at 10:27.

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

21st December 2005, 14:36	#2 \| Link
goonix Registered User Join Date: Feb 2005 Posts: 272	Hi Stealth3si! Converting from DivX/Xvid (mpeg4) to DVD format (mpeg2) is a re-encode... If you choose a lower bitrate at this process, your movie will fit directly to a DVD and don't need to re-re-encoded again. goonix

21st December 2005, 16:44	#3 \| Link
Stealth3si Registered User Join Date: Nov 2005 Posts: 66	I see. Thank you goonix and considering your advice, you just saved me time.

23rd January 2006, 22:20	#4 \| Link
Robotik da kid Join Date: Jan 2006 Location: Hungary Posts: 141	Well, I'm not sure who done it with what, but i have a single layer dvd containing the old Star Wars trilogy. My standalone dvd player that doesn't support divx can play it without difficulty, so i assume it is mpeg, and also there is a menu in the beginning where you can choose between the 3 movies. And the picture quality is far superior to some of the original vcd's and svcd's i have, and on my 21" tv i can't even tell it apart from a dvd. I guess the trick must be in coding only a few keyframes per minute, but i've never done any serious transcoding besides using shrink, so it's only a guesswork. Anyway, if you're interested, i can go look into it

15th February 2006, 21:16	#5 \| Link
pelmen Registered User Join Date: May 2004 Posts: 30	you can split out the audio from the divx avi and use something like besweet to encode to ac3 and use a program that can make DVD compliant MPEG-2 files and convert your avi straight to .mpg with it (just making an MPEG-2 file is not DVD compliant). if you used DVD compliant encoder/settings then you can drop the mpg and ac3 files into a dvd authoring package and they will not have to be re-encoded to make the dvd. it will save steps and save multiple re-encodes but it may take you some practice to get the settings perfect for the mpg file to be DVD compliant (if its not the dvd authoring package will re-encode it)