Quantcast DVD Constant Bitrate or CQ? - digitalFAQ.com Forums [Archives]
  #1  
02-24-2004, 04:11 AM
khusru khusru is offline
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iv got a file thats just under 3 hours, now i wana convert to dvd to the best quality possible.

1. should i use a standard dvd temptlate and use Cq or Cbitrate?

2. Use a KDVD template and max out the cq so the file fits the dvd

3. which will give me overall better quality KDVD or dvd

at max quality i can onle fit 2 hours using the standard template, and usinf c bitratet he quality gets quite blockky in the fast moving stuff so i thought maybe CQ? but if i use the dvd template il get a smaller cq that a kdvd template
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  #2  
02-24-2004, 04:27 AM
khusru khusru is offline
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3. which will give me overall better quality KDVD or dvd

(for this situation with the 3 hour file)
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  #3  
02-24-2004, 04:38 AM
Dialhot Dialhot is offline
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KDVD will always give you better result as the Matrix used is far more efficient.

I don't know what encoder you use but with Vmesquita templates for CCE I do all the time 2-movie KDVD (that is near 3h30) with 2 audio an d1 subtitle each with great quality.

But I guess you ehre talking about TMPGENC. And in this case there is no doubt to have : use CQ !
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02-24-2004, 07:20 AM
khusru khusru is offline
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yeh i use tmpg, so i guess its KDVD with the highest cq possible, thanks again for help
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02-24-2004, 08:27 AM
khusru khusru is offline
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another question dialhot ( i didnt want to start another thread),

On my kvcds i keep getting cq of around 60, these are 100 min movies approx. and im doing the at 528 *576, is this normal? how can i get better cq, im using script
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02-24-2004, 09:14 AM
incredible incredible is offline
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Hi khusru,

first, please use the "Edit" button if you want to add something to your previous postings ... by this it makes it easier for overviewing the thread.

Second, ... Yes, a CQ of 60 at 100min Movies at your res. is in the normal range.

CQs do not only depend on movies length, but also on movies contents and treatments. There are several ways: A good performed Denoising which still keeps details, a good macroblock respecting resizing (borders must be devidable by 16 i.e.), and if really needed a minimal touch of blur to "break" the edges which also rises the CQ.

Example of mine: Matrix reloaded - very easy to compress at 480x576 in avery good quality cause of much dark in the movie, I was able to put that movie on oneCDr80 including 2 audio streams
A con Example was "Message in a Bottle" - very hard to compress! Cause of much uneasy water scenes = much bitrate!
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  #7  
02-24-2004, 09:43 AM
Dialhot Dialhot is offline
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Quote:
Originally Posted by incredible
Second, ... Yes, a CQ of 60 at 100min Movies at your res. is in the normal range.
Normal but that can be increase except if the source is full screen.
As he always have such value, I suggest him to review his settings and his script.
For 100min with 544*576 I'm commonly around 70.
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02-24-2004, 01:21 PM
khusru khusru is offline
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thanks for the help again guys. iv been encoding with borders ( so not full screen) and my script is the latest one from the avi convsion forum, so must be the settings or something. il check them up, not doing any encoding till the weekend now, so il leave it at that
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  #9  
02-24-2004, 02:06 PM
Lagoon Lagoon is offline
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I guess the low CQ is because you start with an AVI
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