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21st February 2003, 16:26 | #21 | Link |
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I have the AVIA test disc as well... I also found with the DIVX I made, leaving the ITU box UNCHECKED results in the appropriate AR when viewed on the computer monitor (using a 4:3 resolution).
I agree that the AR should look correct when using software players, even crappy ones like ATI player and Windows Media Player that don't have AR correction in them. I have an ATI All-in-Wonder with calibrated TV out (I use overscan, and then set Zoomplayer to resize the window perfectly for my TV). ITU box unchecked still looks the best. -Sumster |
1st March 2003, 16:19 | #22 | Link |
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I've done more testing with AVIA and now completely stand by original deduction that the AR is correct with the ITU box unchecked, on software DVD players.
As I mentioned previously, if anyone has another test disc, such as Video Essentials, we can insure that the AVIA disc is not "AR" faulty in any way. -Robert |
1st March 2003, 18:19 | #23 | Link |
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The funny thing would be that avia would have done it not correctly.
I'm looking forward the Video Essentials confirmation though some testing on popular dvds with easy mesurable shapes would be interessant too. |
2nd March 2003, 15:42 | #24 | Link | |
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2nd March 2003, 19:40 | #25 | Link | |
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That's not what he is saying. Did you take a look at the files he provided ? He is imho refering to the nice perfect circles and squares displayed by the avia test disc that stay circles and squaares without the itu checkbox checked. Still awaiting somebody with a video essentials test disc or some good old real test on commercial dvds... |
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3rd March 2003, 14:35 | #26 | Link | |
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Seems, we really need some more tests on other dvds to answer the question, which dvds are actually more common: spec-compliant (itu-box checked is right) or simple 4:3/16:9 (itu-box unchecked is right). But to get a perfect resizing we would have to check on each disc we rip anyway, so maybe it's not that important, which kind of discs is more common. |
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4th March 2003, 05:34 | #27 | Link |
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I see many talking and explanations about DVD's and also all resolutions like 720X568 etc, but nothing on what I am looking for!
The problem is that I (except once) could not find a right size so it could be desplayed at the right size on my tv. Ofcours with players like "Windows media player" it dose but as you know it is resized by that player to get the right aspect R Here is my problem: I am encoding my personal captured avi's with Gknot and not DVD. I capture from Digital Satellite Tv @resoluton of 768X576 and My source is PAL. As you may know GordianKnot detects the file as "Other 768X576" and not pal or ntsc in the input resolution. For the input aspect Ratio I am not sure if I have to choose "1:1" or "Pal Non Anamorphic 4:3" !!!? Or other! ? Also 90% of the movies I have captured have the Black bars on Top and Bottom, so I have to crop them for about 80 on each "up & Down" side and for some of them about 120 pixel up and down. I would like to ask you if possible to tell me what is the right aspect Ratio I should choose in your view and what kind of resizing method to use that is best for my files. |
4th March 2003, 17:30 | #28 | Link | ||
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About the ITU Standard... I've made some tests and encoded files to be put on miniDVDs. When I used TMPGEnc, the image I got with the ITU box checked was the perfect size. But I also made some MPEG-2 files using the Adobe MPEG Encoder and I had to uncheck the box to get the initial aspect ratio. This is confusing! Quote:
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6th March 2003, 13:26 | #29 | Link | ||
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in your case 768/767 is correct (almost 1:1). wef. |
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6th March 2003, 21:36 | #30 | Link | |
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I don't know whether birdy's video source is analog or digital. I've assumed that the "digital" source birdy was referring to was a satellite receiver and not a DVB card. Maybe I'm wrong... But I didn't think that such a resolution could be used by satellite channels. |
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7th March 2003, 22:30 | #31 | Link | |
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My video source is "Digital" From satellite receiver and not DVB card. I connect the digital receiver out put via Scart cable to my capture card "Composite In" And the capture card is a bt878 Avermedia. So I use Bt8xx WDM video adquisition Driver and set my capture resolution to 768X576 and do a capture. Also The system is PAL. Now you maybe right, digital satellite channels don't use such resolution! Most channels I am recording from use 720X576. But when I capture @768X576 then my file is no longer a 720X576 file! right? So I should use the settings for the resolution I captured! Also maybe after all its not that good idea to capture at 768X576? ! What would you advise? |
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7th March 2003, 23:07 | #32 | Link |
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So I was right!
You should assume that your pixels are square. The source pixel aspect ratio is 1.000 and the display aspect ratio 1.333. The aspect ratio of your final video should be 4:3... unless you'd like to crop black bars when encoding a widescreen movie, of course. |
12th March 2003, 00:27 | #34 | Link | |
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usually all original analog material is spec compliant (film transfer is always done with the same machines), because analog nature/limitation/transfer-process/... is the "mother" of the specs. digitally produced material (like menue graphics, test screens,...) might be not. check out "the big lebowsky" and look for a scene with a screen filling bowling ball, my pal version is itu spec compliant... (this once was know as the "lebowsky test" ) wef. |
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12th March 2003, 14:49 | #35 | Link | |
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13th March 2003, 14:19 | #36 | Link | |
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I've read this thread. Though things can be quite complicated at times, this topic is interesting and full of information. But what about Gordian Knot's "Select Pixel Aspect Ratio" Window? I believed that the "1/1" PAR should be chosen when converting captured video to DivX. At least that's what the great majority of people, if not all, are doing. By the way, have you read what I had written about the ITU Standard? It seemed to me that the MPEG-2 files encoded with TMPGEnc were ITU- compliant. What do you think about it? |
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17th March 2003, 23:12 | #38 | Link |
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lol!
wef how can you claim that GK has correct (1:1) pixelAR everytime (no matter of the input par) if you can't answer this question? also http://forum.doom9.org/showthread.php?s=&threadid=46800 ps. should we dare mention par at all? [if gk resizes 720x576 to 640x480 with some avs resizer output video has wrong par..(it's still not square PAR) comparision of original dvd image and 640x480 divx (or xvid) played back on tv-out should prove it...] anyway........ /ivo |
19th March 2003, 02:56 | #39 | Link |
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For me there is still a doubt here!
As said I use captured 768X576 Pal Avi. If as sugested I use 1.1 AR then my output file on tv dose not look the same as my original file! My problem is the HIGHT! The hight from the original avi on tv is biger then the one from my AVS created in GKnot! When I open the file there are 3 Options in Gknot: 1-Pal, 2, NTSC, 3,Other My 768X576 Pal avi files is recognized as: Other Then I select 1.1 for the input Aspect ratio Then I crop and when I play the AVS file on my tv I get few Centimeteres less hight then original file! I also tried the option: Other for the input Aspect ratio and choose 768X576. But the result is same as 1.1 But when I set the input resolution to PAL instaid of other the width and highte size is grayed out and set to 720X576. But strangly the avs created this way has the same hight size as the original avi when played on tv!!!! Can someone Clarify this ? |
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