Quantcast What Resolution Should I use for a Source with a Resolution of 576x240 PAL? - digitalFAQ.com Forums [Archives]
  #1  
05-04-2003, 04:24 PM
Wolfi Wolfi is offline
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Simply, what resolution should I use for a source with a resolution of 576x240 PAL

//Wolfi
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  #2  
05-04-2003, 04:29 PM
conquest10 conquest10 is offline
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528/544x576
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  #3  
05-05-2003, 05:20 AM
Abond Abond is offline
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I don't know if it is good idea. Usually I try to encode in such a way, that the encoded file has equall or less pixels for frame than the source. The reason - in the source file there is information for the pixels regarding the resolution. If one try to encode with the resolution, which require more pixels should expect decrease of quality as the information for the extra pixels don't exist at all. In the case - 576X240 = 138240 pixels. If the aspect ratio is 2.35:1 then 528 X 432 = 228096 pixels. I would suggest to encode with 352 X 288. You have 352 X 216 = 76032 pixels. The 432 and 216 values are only for the picture, the remain are black borders. I hope this make sense.
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  #4  
05-05-2003, 05:56 AM
Jellygoose Jellygoose is offline
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Theoretically you're right Abond. However, I found out for myself, that upscaling with "BicubicResize" gives me excellent results. When you encode this with such a low resolution, I'm sure picture will look worse. However you should try out what best suits you
If you decide to upscale, use a precise BicubicResize.
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  #5  
05-05-2003, 09:44 AM
Wolfi Wolfi is offline
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so there is no good resolution in the middle of 352x288 and 528x576

//Wolfi
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  #6  
05-05-2003, 09:58 AM
Boulder Boulder is offline
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352x576, CVD resolution. I use it from time to time.
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  #7  
05-05-2003, 10:10 AM
bman bman is offline
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In this case I prefere 352x240 .
Your source is 576x240 - just 240 lines . If u go to higher res I dont think u'll get better picture .
Go for 352x240 with highest CQ value with little sharpening u'll get best u can .
Want to be sure make small clips and compare
bman
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  #8  
05-05-2003, 10:16 AM
Wolfi Wolfi is offline
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SVCD or VCD, how will give me the best quality

//Wolfi
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  #9  
05-05-2003, 10:24 AM
bman bman is offline
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U are using KVCD temlates right ?
So , quality u'll get even with 352x240 will be much higher than VCD - xVCD (KVCD).
If source is HQ than u can expect quality almoast SVCD .
bman
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  #10  
05-05-2003, 10:29 AM
Wolfi Wolfi is offline
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Quote:
Originally Posted by bman
U are using KVCD temlates right ?
So , quality u'll get even with 352x240 will be much higher than VCD - xVCD (KVCD).
If source is HQ than u can expect quality almoast SVCD .
bman
But should I choose SVCD as MPEG strem type or VCD
EDIT: Why should'nt I have this resolution, 352x480

//Wolfi
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  #11  
05-05-2003, 10:44 AM
bman bman is offline
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I didn't say do not use 352x480 .
Just , try and see . Take same episode and encode it with 352x480 , 352x240 , 480x480 or even 704x480 if your player can support it and compare them . This test shoud take about half an hour but than u'll be sure in your choise .
Which stream svcd or vcd ??? I don't follow exectly what u mean !
Try to encode as mpeg1 as egreed that TMPGenc is best for it .
bman
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  #12  
05-05-2003, 10:57 AM
jorel jorel is offline
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Quote:
Originally Posted by bman
I didn't say do not use 352x480 .
Just , try and see . Take same episode and encode it with 352x480 , 352x240 , 480x480 or even 704x480 if your player can support it and compare them . This test shoud take about half an hour but than u'll be sure in your choise .
Which stream svcd or vcd ??? I don't follow exectly what u mean !
Try to encode as mpeg1 as egreed that TMPGenc is best for it .
bman
excuse my ignorance:


704x480 is for ntsc?
ashamed thanks!
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  #13  
05-05-2003, 11:19 AM
dazedconfused dazedconfused is offline
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Quote:
Originally Posted by jorel
704x480 is for ntsc?
ashamed thanks!
Yes, 704x480 for NTSC, 704x576 for PAL.

-d&c
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  #14  
05-05-2003, 11:22 AM
Wolfi Wolfi is offline
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Quote:
Originally Posted by bman
I didn't say do not use 352x480 .
Just , try and see . Take same episode and encode it with 352x480 , 352x240 , 480x480 or even 704x480 if your player can support it and compare them . This test shoud take about half an hour but than u'll be sure in your choise .
Which stream svcd or vcd ??? I don't follow exectly what u mean !
Try to encode as mpeg1 as egreed that TMPGenc is best for it .
bman
Ah, I mean witch stream type I should select in ToK
Is'nt also res. 480x480 NTSC

//Wolfi
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  #15  
05-05-2003, 11:28 AM
bman bman is offline
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Select VCD !
As your source is 576x240 I assumed that your source is 23.976fps and NTSC .
If I'm wrong than sorry ?!
bman
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  #16  
05-05-2003, 11:44 AM
Wolfi Wolfi is offline
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Quote:
Originally Posted by bman
Select VCD !
As your source is 576x240 I assumed that your source is 23.976fps and NTSC .
If I'm wrong than sorry ?!
bman
576x240, 25.000 (PAL) :P So you mean 480x480 is NTSC

//Wolfi
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  #17  
05-05-2003, 12:05 PM
Wolfi Wolfi is offline
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My source quality is actually very good so dont you think I should use a higher resolution then 352x288

//Wolfi
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  #18  
05-05-2003, 12:24 PM
Jellygoose Jellygoose is offline
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Hey Wolfi, we can't do the job of trying out yourself for you
I'd say you can easily get away with 528x576 (PAL) if your player supports it, but upscale with BicubicResizer. However, opinions differ, so you just gotta try out what you like better...
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  #19  
05-05-2003, 12:39 PM
Wolfi Wolfi is offline
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Quote:
Originally Posted by Jellygoose
Hey Wolfi, we can't do the job of trying out yourself for you
I'd say you can easily get away with 528x576 (PAL) if your player supports it, but upscale with BicubicResizer. However, opinions differ, so you just gotta try out what you like better...
Well it supports 544x480 NTSC so I suppose it will support 528x576 If I choose to encode with 528x576, should I select MPEG-2 or MPEG-1 as stream type in ToK

Using this script

ConvertToYUY2()
LegalClip()
GripCrop( width=xxx, height=xxx, overscan=0 )
GripSize(resizer="BicubicResize")
STMedianFilter(10, 30, 0, 0, 10, 30)
SpaceDust()
unfilter(50,50)
temporalsmoother(1,2)
mergechroma(blur(1.5)
mergeluma(blur(0.3))
DctFilter(1,1,1,1,1,.5,.5,0)
GripBorders()
Letterbox(0,0,32,32)
LegalClip()

//Wolfi
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  #20  
05-05-2003, 12:58 PM
Jellygoose Jellygoose is offline
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If you live in a NTSC Zone, encode at 544x480 instead of 544x576. However, you overscan way to much at the end. Change the values to this: Letterbox(0,0,18,1. The resolution is too low to overlap 32 pixel on each side.
Also lower the LumaBlur to 0.15 in this script, or the picture will get to soft.
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