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Note: next time you will encode an anamorphic picture, tells to tmpgenc it is 16:9, and you want it 16:9 and good luck for the A/R of the output. |
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Beside that, in the beginning of this discussion, I just questioned why we have to set the source to 4:3 (like you said). I didn't say it was wrong or write. You answered me with " :arrow: Anamorphic means 4/3". That is what I didn't agree. And as this "4/3" didn't mean the AR or the resolution, them I still not agree with that. But we are going to nowhere with this... so, as you said, the end. |
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You can turn the idea as you want in your mind, for tmpgenc point of view your source is 4/3. period. Quote:
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Don't mean to heat this debate but I want to learn, you know :)
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Tmpgenc help isn't very extensive on this topic but I understand that centering on the screen an image that's alerady anamorphic will result in a correct output aspect ratio wichever the source A/R selected. Even Center (keep aspect ratio) should work as potentially needed bars would be already in place.. Of course, not shure about this.. :?: |
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Note: to compare quiclkly the arrangement method, you can go in "Clip frame" (in advanced settings), in the second tab (video arrangement) you can change the method and see the impact on the preview directly. |
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But I think you did... Quote:
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You are doing exactly what you said that I would do! :mrgreen: You set a wrong AR in the source and then you tell TMPG to ignore that setting. Try to set "keep aspect ratio" and then encode two samples... one with 16:9 and other with 4:3. Now tell me which one has the wrong aspect. |
The basic rule I use is that I always use "Full Screen", and let AviSynth feed in the correct aspect to TMPEG.
That will guarantee that TMPEG won't try to do any corrections on the source, like if you set "Full Screen (keep aspect)", etc. -kwag |
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If you do the test suggested by Muaddib, then "16:9" will have the correct aspect (and "4:3' is shrinked horizontally 8O 8O). I never saw that on whatever video editing tool I used. (I mean the horizontal steching). Muaddib is right (about tmpgenc) but the problem is that... tmpgenc does the same error than anyone that is a noob in video does : to make a confusion between 16:9 and anamorphic ! What they call "16:9" is in fact "16:9 anamorphic" (the exact word that should be used insteed of just "anamorphic"). And it was called "16:9 anamorphic" because it is not a 16:9 picture ! Anamorphic means 4:3. I can't change the definition of the word (anamorphic = "distorted image" you can check in whatever dictionnary you want). If anamorphic means 16:9, tell me in wich way it is distorted ? Edit: I wonder what they call "2.21" :? |
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Following this way o thinking of not letting TMPG do any corrections on the source, I think the best setting would really be "center" (without the "keep aspect ratio" of course). That's because if we set "Full Screen" and for some strange reason :confused: we screwed up with the script and didn't feed TMPG with the correct frame size, then TMPG will resize the source to fit the frame size we set. If we had used "center" TMPG would had not touched the source (just centered it), making it easier to detect the problem, especially if we are encoding a 4:3 fullscreen. :idea: |
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Come on... Now is the TMPG designer that screwed up the meaning of anamorphic and committed a noob error? No man, they didn't screw up with anything. That setting is doing exactly what it's supposed to do. That is setting the source aspect ratio. Just look at the name of the setting! It can't be clearer! It's called "Source aspect ratio". So here comes the million dollar question... If we agree that all anamorphic streams have a 16:9 aspect ratio... How should we set the "source aspect ratio" setting of a source that is anamorphic? Now about the "horizontal stretching" that you didn't understand... What you think TMPG was going to do if you say that you have a 4:3 aspect ratio source and you ask it to keep this aspect ratio when encoding a 16:9 frame? It was going to do exact the same job of a widescreen TV (that is 16:9) when you say you want to play a 4:3 stream and keep the right aspect... That is put black bars on the sides to preserve the 4:3 aspect. Quote:
What they call 16:9 is 16:9 aspect ratio. Quote:
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It's distorted in a way that this frame (that we know doesn't have 16:9 dimensions) need to be distorted into a 16:9 box to be viewed correctly. |
To clear this a bit up in an example of PAL:
We got physical DVD conform sizes of - 720(704)x576 - 352x576 -352x288 Lets imagine the case of 704x576. The physical size is 704x576, means finally a 4:3 (1.33:1) proportion on TV. The main question now is WHAT is inside these 704x576, means whats the content of the image? Do these 704x576 contain a full recognisable unsqueezed image content? Like this: (dont take care of the green border its the overscan area) http://www.digitalfaq.com/archives/i.../2005/02/1.jpg Or do these 704x576 contain a full recognisable unsqueezed image content but with black bars? Like this: http://www.digitalfaq.com/archives/i.../2005/02/2.jpg (this image IS!! 4:3 out of a letterboxing from a 16:9 origin = black bars WITHIN the 4:3 image!) All these images above do have a 4:3 aspect ratio. Why? because they are NON ANAMORPHIC, means NOT horizontally Squeezed in a significant way. So when re-encoding these, we choose as Source 4:3 and also as target 4:3 Now lets assume the case IF we got an anamorphic image within our 704x576 pixels. http://www.digitalfaq.com/archives/i.../2005/02/3.jpg This is anamorphic, means horizontally squeezed, means it has to be stretched on TV (not in the encoder) by a factor of 1.333 horizontally, to obtain a perfect 1024x576 image proportion finally on a 16:9 TV/Beamer device ;) If I want to keep it that way, then I do choose in TmpgEnc as Source 16:9 and also as target 16:9, because I do keep the anamorphic 16:9 state. What do I have to do IF I want to make an anamorphic Image to bekome a 4:3 one as IF I want to safe Bitrate for example? Easy: I do choose 16:9 as source as my source is anamorphic (squeezed) and choose 4:3 as target by keeping the aspect ratio. This will result in a letterboxed 4:3, means a 16:9 image proportion within the effective 4:3 704x576 pixels: http://www.digitalfaq.com/archives/i.../2005/02/3.jpg :arrow: http://www.digitalfaq.com/archives/i.../2005/02/2.jpg Conclusion: The encoder itself DOESN'T care whats within the 704x576! The encoder ONLY recognises the 704x576 as a total pixel area. If in the encoder the option 16:9 as target is choosen (no matter if CCE, TmpgEnc, mencoder, Qenc etc) THEN this means that a 16:9 flag will be set in the header of the mpeg file while encoding. WHICH causes the playback device (SAP) finally to stretch (undistort) the encoding by a factor of 1.333 horizontally finally to match the 16:9 Image area of the TV/Beamer. ... And thats what Phil meant ... Heres also some info about AspectRatios etc. http://www.incredible.de.tf/aspectratios.html |
All the problem comes from this :
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The second one is what I call a screwy stupid usage of the word "16:9" (done in tmpgenc and A LOT of noobs article) insteed of "16:9 anamorphic" or just "anamorphic". I can repeat this for ever : an anamorphic picture is not 16:9, it is 4:3 and MUST be undistort to be seen as 16:9. As Muaddib said "we know (it) doesn't have 16:9 dimensions". We... the humans. Not the computers nor the TV set. For them, as as long you do not tell them "this is a 16:9 frame", they treat and display them as 4:3 :!: |
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People do think IF they see a movie incl. black bars on top and bottom than that this is a case of 16:9 ... and it isn't. 4:3 = NOT squeezed horizontally (non-anamorph) 16:9 = Squeezed horizontally (anamorph) And I dont know why we always do bring doubts about such facts again on top as so many threads already dealed with that where discussions and conclusions already have been made :?: :wink: |
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4:3 - 16:9 and 16:9 anamorphic are THREE different things ! Ok, I drop it, do as you want. But do not ask yourself this : "And I dont know why we always do bring doubts about such facts" The doubt is created by the usage of a single word for two different things. Note: I'm sure you know some 16:9 SAT TV broadcast channels (like new HDTV Euro1080). Are they anamorphic ?. :roll: |
In an "encoder language" (and we are talking about encoding in here) 16:9 output means a SQUEEZED image including a 16:9 Stream-Header-Flag which lets stretch or letterbox the squeezed anamorph picture by the SAP to fit CORRECT a ....
16:9 TV proportion :arrow: stretching horizontally means 1024x576px (seen digitally) or ... 4:3 TV proportion :arrow: squeezing vertically means 768x432 incl. adding black borders at top/bottom. All ---16:9--- DVB broadcastings are broadcasted in a squeezed state! The DVBviewer appl. does show that flag in the Informationspanel and de-squeeze them like a SAP. There do exist many 4:3 broadcastings (and movies seen in a whole) where a 16:9 effective moviearea was letterboxed into the 4:3 image = black borders. AND THATS the confusion! MANY MANY TV-Magazines do describe some Movies as broacasted in 16:9 but they are just 4:3 using black borders at top/bottom = a detail-fake. 16:9 regulary means a squeezed/anamorph image within the choosen resolution when encoding 4:3 means NON squeezed, so non anamorph 16:9 Letterboxed in 4:3 is a conversion-word misusage where the Image comes in effective non squeezed 4:3 incl black borders. I do think very clear that we both do mean the same thing! As I also know all your other threads and skills about that in here. :wink: |
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Like the other misuse that you point just after : Quote:
When you buy a 16:9 TV set, it does not have a "squeezed" screen, it has a rectangular 16:9 screen. When you make a 16:9 screen for your projector, you do not buy a 4:3 piece of elastic material that you shrink horizontally. You buy directly a 16:9 material. 16:9 is one thing, 16:9 anamorphic is an other. And I'm sorry to continue to tell that 16:9 anamorphic is "a sort of" 4:3 picture. |
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ok, if you see it like that THEN a 16:9 Stream is a squeezed Image so it fits in a 4:3 total technical image proportion like 704x576 (=768x576) ... which will be stretched finally on your 16:9 TV back to its real 1.78:1 state. But anyhow .... in mpeg encodings 16:9 means regulary squeezed/anamorph ... thats a fact ... sorry but I dont want to push it more now. Quote:
If the projector is feeded via analogue component or svideo signal, then the projector deals with 625Lines at 50hz! If the projector will be feeded via RGB VGA connection (like via PC) then the effective resolution will be directly provided to the LCD panel, like 1024x768 at 75hz. Quote:
Do set in CCE "16:9" and this means that the encoder gets the message that a squeezed picture input has to be encoded in a kept state where a 16:9 flag has to be included so the SAP "recognises" that he deals with a 16:9 anamorph input where the result is a letterboxing to 4:3 or a DIRECT squeezed deliverence to the TV set is given where the TV set stretches the signal to its 16:9 image state finally. |
(related to 1080i DVB broadcasting):
STOP! Youre right! (in case of HDTV) as the resolution of HDTV is 1920x1080i and 1280x720p So thats an "effective image of 16:9"-encoding, means the new HDTV Format. BUT all my explanations where based on the encoding techniques and defenitions of NON!-HDTV where the Output mainly is purposed for 625/50Hz devices playback at 14.769 Hz @ 52.000 = 768x576(seen digitally). HDTV Devices do not follow those known analogue Playback devices signal technique as theyre capable to show digital input directly. |
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All that because "encoders" can't speak basic english... :lol: |
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To complete there is also one more (strange?) possibility. What do I have to do IF I want to make a 4:3 fullscreen image to become a 16:9 one? Easy: I do choose 4:3 as source, as my source is fullscreen and choose 16:9 as target by keeping the aspect ratio. (<-- that is what Phil was doing setting the source as 4:3) This will result in a "letterboxed" 16:9 with black bars at the sides, means a 4:3 image proportion within the effective 16:9 image. This image still has 704x576 pixels. Do you know why? Because in the end, this frame is an anamorphic picture! That has to be finally stretch (undistort) horizontally to match the 16:9 Image area of the ws TV/Beamer. BTW, setting the encoder this way, we are also using it as an editor. We can easily do that with an AVS script and feed the encoder with the 4:3 active image proportion within the effective 16:9 anamorphic frame already edited, and encode a 16:9 to 16:9. |
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I believe I'm starting to understand what you mean, and I think that our disagreement is with the word "aspect ratio", not with the word "anamorphic" (or 16:9). Please, could you tell me what is the aspect ratio of a standard svcd stream? |
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Yes, you are right, it is 4:3, and that's because we need to get those 480x480 pixels and distort it to a 4:3 proportion frame in order to view it correctly. That's what we call 4:3 A/R. That's the same thing with anamorphic. We call it 16:9 A/R because we need to distort it to a 16:9 proportion frame in order to view it correctly. Quote:
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Talking about them (the machines), of course they don't know it is 16:9 until we tell them (insert the 16:9 flag in the stream). They are so stupid that need every thing explained in all details. They can't look at an anamorphic picture and know if this picture is anamorphic or not. As incredible said, for them, it's just a bunch of pixels. For them, an anamorphic stream will be an anamorphic stream if (and only if) it has a 16:9 flag. So when they found that flag they "think": "Ah... I have an anamorphic stream here! This stuff has a 16:9 aspect ratio, so I have to distort it into a 16:9 frame." That is exactly the same for a 4:3 svcd stream (for example). If we (the humans) don't tell them (the machines) that it's 4:3 they would never have a clue of that. So we have to tell them: "Hey, look for a 16:9 flag... If you find one, then it is a 16:9 stream; else it is a 4:3 stream (as anything not flagged is treated as 4:3). This does not mean that an anamorphic stream will be 4:3 IF it's not flagged. Because a not flagged stream IS NOT an anamorphic stream (for the machines). Now talking about us (the humans)... We don't need a flag to tell us that the right aspect of a anamorphic frame is 16:9, we know the process, we know the theory, or even if we hadn't knew the theory, we are different from the machines that only see pixels... just looking to a anamorphic picture we know that it has a wrong aspect if it was not distorted into 16:9. In the same way we know (just looking at it) that a 480x480 svcd has a wrong aspect if it's not distorted into 4:3. So, it doesn't matter... for machines or for humans, an anamorphic stream is always 16:9! |
You know what ? You're right.
Next toppic. |
:ole: :lol:
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[edit:] Please, I don't want to push it any further, but I just found another program that makes that "stupid noob error" (?) you told. DVD2AVI identify any anamorphic stream as "Aspect Ratio: 16:9" |
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But as you do not want to push it further, I won't tell you to take a ball, to put in into a square box and to tell us what is the shape of the box now (not the content, the box). One day you will look further, in electronics and shortwave broadcast domains, and you will understand what is a 4:3 stream and what is 16:9 (in words of box, not content). Video editing does not rules the world... But be happy, I said you are right. Enjoy ! DV recoders (some ?) have true 16:9 mode (not anamorphic). Give it to DVD2AVI or any other encoders and make me laught... |
Haha... This thread just didn't want to die! :lol:
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The box is square, of course! Putting a ball inside it doesn't change its shape, but that's exactly what you still don't understand. We are not talking about the box, we are talking about the BALL! It was YOU that said you always think about aspect ratio and not about frame size proportion, but you are doing exactly the opposite! If you just look to the "box", then you are looking to the "frame size" and not to the "aspect ratio"! IF we would follow you into this, them we need to call an SVCD stream as 1:1, because it is inside a box of 480x480! But as you already said, an SVCD is 4:3, even if it is inside a box with size proportions of 1:1. Quote:
I know video editing does not rule the world, but in case you didn't notice, this site, this forum, this community is ALL about video editing! In this thread you just keep saying this is all wrong, including the developers of such great programs like TMPGEnc, CCE and DVD2AVI; and you are the one that is right. I'm tired of this, and using some words of yours: "I can live with that!" Do as you whish. Quote:
That's exactly the attitude of people that don't have arguments but just want to be right. Quote:
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(note: last word on this toppic. don't be worry if you ask me new questions that I do not answer : I probably won't even read next post(s))
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Note: for me SVCD is 480*576, so not 1:1 nor 4:3 (in proportion)... but this is still SVCD, so still 4:3 (in words of box). What I call the box is the nature of the stream, the container. But you are talking about the content (the ball). I admit that what made me wrong about Tmpgenc's source A/R setting is that it was referencing to the content (that is 16:9) and I wrongly refered the box. But nevertheless, when I say "anamorpic IS 4:3" I am talking about the box. Quote:
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Nevertheless I still considers that as an error that shouldn't have been done because it causes SO MUCH confusion and this will be more and more tricky. Edit : this confusion can be considered as logical for the input as in this case encoders focus also on content, but it's really confusing for output. All those encoders will have to be modified to handle true 16:9 streams. And like I said to Inc, how the hell will they call this mode ? As "16:9" is already used for "16:9 anamorphic". ? Quote:
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And you think that "it's quite logical..." ? I don't think so. |
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Look, I'm sure that we both know what an anamorphic stream is. We know how to create and how to render it. We know the process, the differences and how to deal with them. We just don't agree with the language, or the terminology of the subject. As I say that an anamorphic stream has a 16:9 aspect ratio and you say it has a 4:3 aspect ratio. Quote:
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1-) 16:9 anamorphic 2-) 16:9 non anamorphic ... quite simple hum? :wink: Quote:
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As I told in my other post, machines are completely stupid. How the hell do you want them to identify this kind of stream if they are not prepared to? They were told to treat everything that doesn't have a 16:9 flag as 4:3, and that's exactly what they are doing! For me it is quite logical. Don't you think so? Quote:
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Future of DVD (HD-DVD and Blu ray) also dropped the anamorphic flag for HD materials. So "faaaaar away" is in three to five years. |
You know what?
I haven't figured out what the hell you've been talking about here. Even though I'v read the thread twice. Let's see... I do acknowledge 2 standards: 1) - 4/3 non-anamorphic 2) - 4/3 anamorphic (16/9 when viewed on SAP) 1) - The 1st is the one that is NOT anamorphic flagged. Thus the SAP doesn't need to unsqueeze the image. 2) - The 2nd is the one that has an anamorphic flag. Any SAP will need to unsqueeze the image. This mode will look as 16/9 to our eyes when viewed on screen unsqueezed. Both are 4/3 but one can be used to show 16/9, right? So what the hell have you guys been talking about for so long?? :lol: Cheers |
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-kwag |
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Probable future releases of encoder will... when then will be adapted to true 16:9 streams. In a more a less nearby future. |
Hmmm, I could be wrong but I don't think it has much to do with the encoder.
The encoder just sets the anamorphic flag (as per our instructions) or not. I haven't seen any encoder taking a regular 4/3 picture, setting the flag and squeezing the picture by itself. That would be a real 16/9 encode, right? Any SAP would read the flag and try to unsqueeze it back. But all the encoders I know, just set the flag. So, it's up to the source you're dealing with, IMHO. Since I only deal with 16/9 DVD sources, I don't have to worry much. For anamorphic KDVDs I set FitCD/Moviestacker with anamorphic in and anamorphic out. For non-anamorphic KDVDs or even K(S)VCDs I set FitCD/Moviestacker with anamorphic in and NON anamorphic out. So I still don't get where you guys didn't agree on... :roll: I think you don't agree with the words both of you are using, just that :lol: Cheers |
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So I suggest you to read again the thread :) Quote:
(except if HD-DVD are already on the market but I don't think so). Quote:
That is what I forget also, and were I was wrong in the begining of the tread. Quote:
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:arrow: It is 4:3. Quote:
16:9 has to be called 16:9. Anamorphic has to be called 16:9 anamorphic or anamorphic and nothing else. By using errorneously "16:9" for anamorphic they stupidly screwed up minds and completly locked them to false ideas that won't agree with what will be the reality in the future (I mean true 16:9). When you use to call "black" something that is in fact "dark gray", just because at this moment nothing can produce a real black, the day "real black" comes out, how will you deal with this ? That is the same idea. And I will continue to call that stupid even if all encoders act like this. I don't care being alone :) |
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Personally, I hope you are right. I like new tech stuffs! 8) |
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I understand what you are trying to explain, and I can accept if you say that they are both in a 4:3 "box carrier", or in a box that is used to carry a 4:3 stream, BUT inside that box there is a 16:9 stream! To use that "ball and box" analogy of yours, a ball doesn't stop being a ball just because it is inside of a box. Quote:
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For example, in the computer, I can get an anamorphic stream from an AVS script (so no flag) and render it with various aspect ratios. Let say... 1:1, 4:3, 16:9, 2.35:1, etc. What is the correct aspect ratio of this anamorphic stream? Of course it is 16:9 and that is why we call it 16:9. It's the playing (or projecting) aspect that defines the aspect ratio of a format, not the way it is recorded or printed! We do not say that a ball is square just because it is inside a square box! I'm sure I'm not as knowledge as Phil about theaters and projection lens, but I know that a Cinemascope film is also an anamorphic (distorted, squeezed) picture. If we do not use special lens (that's the flag to SAP) to un-distort the picture it will produce a standard 1.33:1 fullframe. We do NOT call Cinemascope as 4:3 because it is inside (or printed in) a standard film strip frame. We call it 2.35:1! That's exactly the same for 16:9 anamorphic! :arrow: It is 16:9! Quote:
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i dont understand one single thing anymore about this discussion...
symantecs are not worth the effort if you ask me... |
May I ask you something ? What do you think if I tell you that Dolby surround mp2 streams are stereo ?
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Note : I was operator in a theater for 2 years and we NEVER called a cinemascope movie "2.35:1". We ALWAYS called it cinemascope. I wonder who is this "we" that according to you call cinemascope "2.35:1". You probably don't know 70mm material where 2.35:1 movies are NOT cinesmascoped, than mean that you do NOT need to add a lens in front of the projector to restore the picture (that you need for cinemascope). I undestand that you are still hung to the content because you never faced to other thing that "16:9 anamorphic". As I said before, you will need to change your mind in few years. (or months ! EVD standalones arrive in European market mid-june. And EVD is like HD-DVD : it uses true 16:9). 16:9 anamorphic = 4:3 (with a flag) even if you do not want to face the reality ! As you said, if you give this stream to something that do not interpret the flag, it will show it as a 1.333333 frame. Find me a single example where a 4:3 stream is displayed by mistake with an 1.77 ratio ! There is not ! In one hand you have something you want to call 16:9 but that can be wrongly displayed with 1.3333 A/R, on the other hand you have something that will never be confused with a 1.7777 A/R. Take the conclusion you want. Again you should look a little outside the video editing world and try to answer to this VERY simple question : why do they use anamorphism insteed of simply use the real 16:9 A/R ? I already gave the answer : because at this time the only thing all the electronics can handle was 4:3. They had the choice between force people to change all their equipement (and you said yourself that this takes 5 years), and to find a trick to carry the 16:9 content in a 4:3 stream ! If you don't want understand that, I'm really sorry. I never tell that putting a ball into a box change the nature of the ball so please do not claim to have the box name changed because of what is inside. By doing this you simply forget the History and all engineers that are at the origin of this. Trust me, they are a lot clever than video editing softwares editors. (I can tell you about D2-MAC, a french norm for sat broadcast that was dropped after one year because it featured true 16:9 that nothing can handle in the mid-80's !) Of course, the content of 16:9 anamorphic is 16:9 (as in theater, the content of cinemascope is 2.35:1). Quote:
That is people like you (no offense) that put in their mind that "16:9 anamorphic" is 16:9 that make them not understand why this not happens when they open a Divx of the same movie (that is also 16:9) ! And then you have to explain them that Divx are true 16:9 that are not anamorphosed while DVDs are anamorphic, insteed of explaining them from the start that DVD are not 16:9... (don't call them 4:3 if you want, but call them 16:9 anamorphic and nothing else) It's faster to screw up a virgin mind then to unscrew a corrupted one and this thead is the perfect demonstration... Edit: I just realize something. Take TMPGENC, take a 16:9 (in proportion) Divx as source. What do you use in source A/R ? You use 1:1 and not 16:9. Why ? Because you know that Tmpgenc calls "16:9" something that is "16:9 anamorphic" and so, even if your source is 16:9, you musn't use the setting "16:9" else the result will be vertically shrinked. Let me make your words mine "My God! That's what I call confusion. Imagine explaining it to newbies!" :D (note: finally tmpgenc will be abble to handle true 16:9, it's juste like a Divx, you need to use 1:1 - It's sooooooooooo logical that I wonder how I didn't think about that before. I must be too stupid compared to those great designers that made this wonderfull software). |
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