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Invelos Forums->DVD Profiler: Contribution Discussion |
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Contributing Accurate Aspect Ratios |
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Registered: July 16, 2010 | Reputation: | Posts: 527 |
| Posted: | | | | Hello
I normally verify the aspect ratio of a film by viewing the DVD via my computer screen, setting the software to display the picture in its original aspect ratio and then measuring the displayed picture’s size (the number of pixels) using JRuler Pro. (If you’re as short-sighted as I am, you can easily see the individual rows of pixels on the screen). This gives me a very accurate pair of numbers from which to calculate the aspect ratio. Normally the results are close to one of the options offered by the aspect ratio drop-down box. Occasionally the results can be quite different and not really reflect any of the options.
The database appears to accept and hold a wide range of Aspect Ratios; it seems to simply add “:1” to whatever number is typed into the box, even if the options in the drop-down box are not selected from.
When contributing aspect ratios, is it generally acceptable to contribute a figure that isn’t available via the drop-down boxes, or should we always pick the one nearest to the verified (measured) one. The rules suggest to me that we only pick from the choices offered, but I was just wondering if this is a correct assumption?
Rule: Use the Ratio drop down list to enter the aspect ratio of the main feature.
I seem to remember there being some sort of discussion about this not so long ago, but I was just looking and couldn’t find it again.
Thank you. Paul | | | Do you ever find yourself striving for perfection with an almost worthless attempt at it? Guttermouth "Lemon Water". Also, I include in my Profiler database VHS tapes, audio DVDs, audio books (digital, cassette and CD), video games (digital, DVD and CD) and 'enhanced' CDs with video tracks on them, as well as films and TV I've bought digitally. So I'm an anarchist, deal with it. Just be thankful I don't include most of my records and CDs etc in it too; don't think I haven't been tempted... |
| Registered: March 13, 2007 | Posts: 21,610 |
| Posted: | | | | Spiky:
Let me sum this up for you. Some users like to "measure" the image. While this is not bad, as I am sure you are aware ther are, for example, AR's of 2.20, 2.35, 2.39 and 2.40 which are ALL legitimate. Can one tell a difference between let's say 1.85 and 2.35 or 2.55 obviously yes. But if you "measure" you don't have to be off by more than a few pixels to have a 2.40 image wind up calculating as if it were a 2.35 or even less to 2.39. My recommendation is to simply go with what is on the package unless it is an obvious error, like say the package says 1.85 but it's really more like 2.35. I would further not recommend departing for industry standards, which means let's not try to insert 2.31 and pretend that it is accurate, the industry standards are as follows 1.33, 1.37(Academy), 1.66, 1.77, 1.78, 1.85, 2.00, 2.10(rare), 2.20, 2.35, 2.39, 2.40, 2.55 and 2.70, I think I got them all. | | | ASSUME NOTHING!!!!!! CBE, MBE, MoA and proud of it. Outta here
Billy Video |
| Registered: March 15, 2007 | Reputation: | Posts: 5,459 |
| Posted: | | | | I think it all depends on how far out the aspect ratio is to what it is labelled as. If a film is identified as 1.85:1 but is actually 1.77:1 (no black bars) I think that's important. If a film is identified as 2.35:1 but is actually 2.40:1 I think that less important and less likely to mark the difference in the profile. So if a film measures as 2.37:1 I would simply choose 2.35:1 from the drop-down, but if it's way off like 2.6:1 - I would type that in. |
| Registered: March 13, 2007 | Reputation: | Posts: 3,197 |
| Posted: | | | | I would suggest rounding the value to the nearast available aspect ratio in the drop down menu unless it is an obvious error (obvious in this case = visible to the naked eye). So if you calculate for example 2.37 but the box says 2.40, I'd still enter it as 2.40. Or 2.35 if that is what the box says. But if the box says 1.85 and you measure it to 1.78 (or vice versa), I'd correct it, because the difference is pretty much undisputable if you have a 16:9 display with zero overscan. But can you tell the difference between 2.35 and 2.40 with your naked eye? I sure can't, so I leave it alone. I don't see that it has any practical merit to distinguish between every fraction even if it is theoratically possible to measure it on a computer. | | | First registered: February 15, 2002 |
| Registered: March 13, 2007 | Reputation: | Posts: 5,494 |
| Posted: | | | | couple things as well... I hate it when the High def DVD versions ( from Warner Bros) come out and state 2.4:1 instead of 2.40:1 .. The trimmed 1:85 with bars are cropped tighter for the anamorphic 16 x 9 = 1.777777777777777778 or 1.78 ,, as well , I'm always mystified at some of Disney's prints @ 1.75 ?? and Yes Skip has them all, except for 2:76.1 instead of 2.70:1 ( Ben Hur) as well as the new one recently 2.89:1 .... ....... ( HTWWW) .. and wasn't Goodfellas in 1.9:1 (laser disc) ?? and The Good the Bad and The Ugly in 2.60:1 ?? | | | In the 60's, People took Acid to make the world Weird. Now the World is weird and People take Prozac to make it Normal.
Terry | | | Last edited: by widescreenforever |
| Registered: March 14, 2007 | Posts: 2,337 |
| Posted: | | | | Quoting widescreenforever: Quote: couple things as well... I hate it when the High def DVD versions ( from Warner Bros) come out and state 2.4:1 instead of 2.40:1 .. Maybe because 2.4:1 is correctly rounded up 2.39 and 2.40 isn't? Neather 2.4:1 or 2.40:1 does actually exist. Quote:
I'm always mystified at some of Disney's prints @ 1.75 ?? Early 35 mm widescreen ratio, primarily used by MGM and Warner Bros. between 1953 and 1955, and since abandoned Quote:
and Yes Skip has them all, Not even close See: http://en.wikipedia.org/wiki/Aspect_ratio_(image) Otherwise I agree with that article, except that 5?:3 = 16:9 = 1.777777777777777778= ~1.78 NOT 1.77 | | | Last edited: by Kulju |
| Registered: March 13, 2007 | Reputation: | Posts: 13,202 |
| Posted: | | | | Quoting widescreenforever: Quote: couple things as well... I hate it when the High def DVD versions ( from Warner Bros) come out and state 2.4:1 instead of 2.40:1 .. Maybe I am missing something but, because those two ratios are exactly the same...2.4=2.40=2.400=2.4000...I don't understand why that would bother anybody. | | | No dictator, no invader can hold an imprisoned population by force of arms forever. There is no greater power in the universe than the need for freedom. Against this power, governments and tyrants and armies cannot stand. The Centauri learned this lesson once. We will teach it to them again. Though it take a thousand years, we will be free. - Citizen G'Kar |
| Registered: March 13, 2007 | Reputation: | Posts: 5,494 |
| Posted: | | | | why? Because if Warner's releases i.e. The Dark Knight on standard DVD and BluRay the standard DVD is listed on their package as 2.40:1 and the BD is issued with 2.4:1 on their packaging .. so far so good.. Until you contribute them that is and If you put the same on either package it will get voted down.. Why? it's as you say .. " Maybe I am missing something but, because those two ratios are exactly the same...2.4=2.40=2.400=2.4000...I don't understand why that would bother anybody." ... It seems to bother the voters here .. | | | In the 60's, People took Acid to make the world Weird. Now the World is weird and People take Prozac to make it Normal.
Terry |
| Registered: March 13, 2007 | Reputation: | Posts: 13,202 |
| Posted: | | | | Well, that's a little different. I can understand being bothered by the fact that the voters don't seem to know that they are the same, it's the being upset with WB that I didn't. | | | No dictator, no invader can hold an imprisoned population by force of arms forever. There is no greater power in the universe than the need for freedom. Against this power, governments and tyrants and armies cannot stand. The Centauri learned this lesson once. We will teach it to them again. Though it take a thousand years, we will be free. - Citizen G'Kar |
| Registered: May 8, 2007 | Posts: 824 |
| Posted: | | | | SpikyCactus, I think you are doing it the best possible way. This gives an EXACT aspect ratio of what is actually on the disc, and is factual, mathematical, indisputable data. I cannot for the life of me see why ANYONE would want it any other way... why would you want it to say something that it is not? | | | 99.9% of all cat plans consist only of "Step 1." |
| Registered: March 29, 2007 | Reputation: | Posts: 4,479 |
| Posted: | | | | Quoting Grendell: Quote: This gives an EXACT aspect ratio of what is actually on the disc, and is factual, mathematical, indisputable data. I agree with that. After all, it is in the spirit of rules to match EXACTLY with what is on disc (credits, audio and subtitles...) or on cover when not on disc (scans, overviews...). So why not be EXACT in this case ? | | | Images from movies |
| Registered: March 13, 2007 | Posts: 21,610 |
| Posted: | | | | Exact? Hah! Hardly as I hyave said many times before it can take as little as a 4 pixel error toake a difference to make a relative significant difference in the AR. None of us are thyat bgood, consistently, probably quite the opposite.
A real life example sort nof. We all know Gone with the Wind I presume. During the recent restoration it was discovered that the Technicolor prints had ALWAYS been out of registration by 5 pixels. Five little pixels...and this had been true since 1939. Computers uncovered thge problem and computers made the adjustment to correct the problem. The end result was a movie that, in clarity and level of detail thta had NEVER been seen before. Sorry people, I don't believe that ajy of you or myself included can claim to be accurate enough to gived credible calculations relative to the AR, and for those of you who have seen the BD GWTW then you know the level of visual detail I refer to and that was only because of 5 measly pixels. o stop with pretending a level of skill which you simply do not possess, it;s pure unmitigated BULL | | | ASSUME NOTHING!!!!!! CBE, MBE, MoA and proud of it. Outta here
Billy Video |
| Registered: March 14, 2007 | Posts: 2,337 |
| Posted: | | | | Quoting surfeur51: Quote:
So why not be EXACT in this case ? OK, let's assume that the measured amount of pixels is 1920*1080. Now, could you please tell me how do you present that EXACTLY in DVDP? | | | Last edited: by Kulju |
| Registered: March 14, 2007 | Posts: 2,337 |
| Posted: | | | | Quoting Winston Smith: Quote: I don't believe that ajy of you or myself included can claim to be accurate enough to gived credible calculations relative to the AR, and for those of you who have seen the BD GWTW then you know the level of visual detail I refer to and that was only because of 5 measly pixels. Actually even smaller changes in pixel count can change the numbers. 1920*800 pixels = AR 2.40:1 1920*802 pixels = AR 2.39:1 | | | Last edited: by Kulju |
| Registered: May 8, 2007 | Posts: 824 |
| Posted: | | | | Quoting Winston Smith: Quote: I don't believe that ajy of you or myself included can claim to be accurate enough to gived credible calculations relative to the AR, and for those of you who have seen the BD GWTW then you know the level of visual detail I refer to and that was only because of 5 measly pixels. o stop with pretending a level of skill which you simply do not possess, it;s pure unmitigated BULL I am not pretending, anyone can do it to down to the pixel by using the "zoom" function in any image editing program. How can people not be aware of this. It boggles my mind. | | | 99.9% of all cat plans consist only of "Step 1." |
| Registered: May 8, 2007 | Posts: 824 |
| Posted: | | | | Quoting Kulju: Quote: OK, let's assume that the measured amount of pixels is 1920*1080. Now, could you please tell me how do you present that EXACTLY in DVDP? 1.78:1 | | | 99.9% of all cat plans consist only of "Step 1." |
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Invelos Forums->DVD Profiler: Contribution Discussion |
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