Quantcast KVCD: Which Template to use in Plain English? - digitalFAQ.com Forums [Archives]
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01-01-2005, 01:31 PM
Steelfist Steelfist is offline
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I'm sure everyone is sick of this particular question but I have to ask it again. I really think someone should make it a part of their KVCD guide, as the sheer amount of disjointed information found on these forums can be a bit daunting to newbies, and frustrating for intermediates who don't want to spend hour after hour re-encoding the same movie with different templates and resolutions to see what gives them the best quality.

From what I've gathered so far, MPEG-2 templates are only there for compatability reasons and supposedly don't look as good as MPEG-1's when using TMPGEnc. If so, why is that not covered in the FAQ?

Ok, so I've got a 106m movie that I want to fit onto a single CD. Using the above advice that MPEG-1 looks better when encoding with TMPGEnc,
I have a couple of choices.

I start off with the standard KVCDx3-MPEG-1-NTSCFilm and process with CQmatic, using the optimum AVS script. CQ returned is 56.....blech.

Now....how perceptable is the quality difference between:

KVCD-CQ-352x480-_NTSCFilm_-PLUS,
and KVCDx3-MPEG-1-NTSCFilm, set to 352x480
Both with a CQ around 70?

Is the notch matrix that much better? If so WHY?

Could you please update the FAQ page Kwag? It would be nice if you graded the templates according to overall quality vs average movie length, and also discuss the difference between MPEG-1 and MPEG-2 as it relates to the templates. I'd do it myself if I knew what I was looking for in terms of quality, but I feel I'm still too new at this to know how the picture should look as opposed to what I'm seeing.
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  #2  
01-01-2005, 03:43 PM
kwag kwag is offline
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Hi Steelfist,

The templates are nothing more than an old "Illusion"
KVCD is not template related.
It's all about the notch matrix, special tools, and advanced encoding methods/techniques.
All TMPEG templates with KVCD parameters are identical, except for target resolution.
The X3, X2 names, etc., are there for historical reasons.
So think about KVCD as a "method and tools" with an embedded matrix which can be applied to any encoder capable of custom matrixes. Be if for CD, DVD or for streamming applications.
And yes, the notch matrix does make a huge difference, specially in low lit scenes and flat surface scenes.

In short:
1) MPEG-1 with TMPEG will give you the best quality. Better than any other encoder.
2) Any CQ below ~60 or so, with KVCD's notch matrix, to me is not acceptable. Use that as a reference point.
3) The higher the resolution, the better the quality. That is if CQ is at least ~60 on high resolutions ( 704x ) and at least ~67 or so on 352x resolutions.

The templates will not be updated because we published the specifications here: http://www.kvcd.net/portal/articles.php?lng=en&pg=20
That way anyone can apply the parameters to any TMPGEnc template or any other encoder.

And in the end, you will always be the final judge on your encoded quality
So you'll have to make small test clips to find out exactly what you like best.
The best resolution that we've found for movie time/compression is basically 528(544)x480 NTSC or 528(444)x576 PAL.
And that resolution is already applied to one of TMPEG's templates, which we call KVCDx3, for easy loading.

-kwag
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