Quantcast GOP Structure in KVCD Superior? - digitalFAQ.com Forums [Archives]
  #1  
06-20-2002, 01:24 PM
Jellygoose Jellygoose is offline
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Hi Kwag...

This Is For You I guess...

I encoded a movie with your KVCD 352x288 PAL, and I noticed, that even with a max. bitrate of 1500 and a CQ of 75, it will still fit on a 700 MB
CD-R...

Then I tried to encode a movie with the KDVD Half-D1 PAL Template, and I noticed that the file sizes were REALLY big, compared to those encoded with KVCD... although I decreased the CQ to 53 and the max. Bitrate to 2000...

Could It Be that the GOP Structure of the KVCD template is just superior and produces lower file-sizes, compared to the KDVD Templates?

Could I just Use The GOP Structure of the KVCD templates with the KDVD Template for MPEG-2 ?
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06-20-2002, 01:31 PM
Rookie Rookie is offline
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Unfortunately no, DVD specifications are to rigid.

You cant really compare the filesize from the KVCD 352x288 to the KVCD Half-D1 template.
To get an real estimate how much the GOP structure influences the filesize import the GOP structure from the KDVD template into the KVCD template (or vice versa) and encode again.

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06-21-2002, 09:45 AM
Jellygoose Jellygoose is offline
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Sorry, I think you didn't get my point...

I don't care about DVD Specifications because i just want to create an SVCD...

So do you think that the KVCD GOP Structure would work with the KDVD Template?
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06-21-2002, 11:59 AM
kwag kwag is offline
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Quote:
Originally Posted by Jellygoose
Hi Kwag...

This Is For You I guess...

I encoded a movie with your KVCD 352x288 PAL, and I noticed, that even with a max. bitrate of 1500 and a CQ of 75, it will still fit on a 700 MB
CD-R...

Then I tried to encode a movie with the KDVD Half-D1 PAL Template, and I noticed that the file sizes were REALLY big, compared to those encoded with KVCD... although I decreased the CQ to 53 and the max. Bitrate to 2000...

Could It Be that the GOP Structure of the KVCD template is just superior and produces lower file-sizes, compared to the KDVD Templates?

Could I just Use The GOP Structure of the KVCD templates with the KDVD Template for MPEG-2 ?
The KDVD template is designed for DVD's. Not for CD-R's. Also the GOP has a fixed max frames of 15 PAL, 18 NTSC, because it's a requirement for DVD compliance. That's why you don't get that much compression. Also the audio is set at 192 with a 48Khz sampling instead of 44.1

You can change the max number of GOP's from 15/18 to 48/50 and lower the audio if you want to put it on a CD-R.

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