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| UK Digital Video (uk.rec.video.digital) For the discussion of all aspects of digital video, including all digital video formats, camera use, editing, post production & all associated equipment, hardware and software. Advertising is prohibited. |
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#1
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| Hello everyone! The last contact I had with this group regarded asking for some guidance around dedicated home video software. I have now taken the plunge and opted for Adobe Premier Elements 3.0. I have installed this and launched for the first time. On the settings tab on the first window that opens, I am asked to select between two ratios (one being widescren). I think the other is 4.3 aspect ratio. My question is which setting? I normally use a widescreen TV. what I am not sure about is the capture ratio of my camcorder. I posess a Sony Handycam DCR/HC35E. I have looked at the manual briefly and it appears that I can select either option. I suspect that this depends whether I use the Easy Handycam mode or not. I have not had much opportunity recently to start shooting and editing and I am generally at the complete novice stage at the moment! I am looking forward to learning about this new found hobby and trust that with you guys behind me - things will be a bit less daunting! Any help will be gratefuly received. melianbriggs |
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#2
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| "melianbriggs" wrote in message oups.com... Hello everyone! The last contact I had with this group regarded asking for some guidance around dedicated home video software. I have now taken the plunge and opted for Adobe Premier Elements 3.0. I have installed this and launched for the first time. On the settings tab on the first window that opens, I am asked to select between two ratios (one being widescren). I think the other is 4.3 aspect ratio. My question is which setting? I normally use a widescreen TV. what I am not sure about is the capture ratio of my camcorder. I posess a Sony Handycam DCR/HC35E. I have looked at the manual briefly and it appears that I can select either option. I suspect that this depends whether I use the Easy Handycam mode or not. I have not had much opportunity recently to start shooting and editing and I am generally at the complete novice stage at the moment! I am looking forward to learning about this new found hobby and trust that with you guys behind me - things will be a bit less daunting! Try both, and see which you like best. Whatever you do, maintain the same aspect ratio through shooting, editing, burning and viewing. If you shoot 4:3, you'll get the best detail, as that's the native aspect ratio of your camera. You'll get black sidebars when viewing, though (unless your TV stretches the 4:3 footage to file a 16:9 screen). If you shoot 16:9, or if you crop your 4:3 footage to 16:9 during the edit, you'll lose detail. The *only* way to get full detail for both aspect ratios without changing cameras is to use an anamorphic lens. |
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#3
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| In message , G Hardy writes If you shoot 16:9, or if you crop your 4:3 footage to 16:9 during the edit, you'll lose detail. The *only* way to get full detail for both aspect ratios without changing cameras is to use an anamorphic lens. .... or a camera with a "true" 16:9 mode, ie it's got all the pixels needed to capture the 16:9 image, and isn't just stretching a lesser set of pixels to do it. SOME little, recent Sony camcorders do this; many more serious ones do; but not all! -- David Pearson |
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#4
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| "David Pearson" wrote in message In message, G Hardy writes If you shoot 16:9, or if you crop your 4:3 footage to 16:9 during the edit, you'll lose detail. The *only* way to get full detail for both aspect ratios without changing cameras is to use an anamorphic lens. ... or a camera with a "true" 16:9 mode, ie it's got all the pixels needed to capture the 16:9 image, and isn't just stretching a lesser set of pixels to do it. SOME little, recent Sony camcorders do this; many more serious ones do; but not all! I did say "full detail for both aspect ratios". If you have a 16:9 CCD, then your 4:3 footage will crop the left/right of the image, losing quality. |
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#5
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| In message , G Hardy writes "David Pearson" wrote in message In message, G Hardy writes If you shoot 16:9, or if you crop your 4:3 footage to 16:9 during the edit, you'll lose detail. The *only* way to get full detail for both aspect ratios without changing cameras is to use an anamorphic lens. ... or a camera with a "true" 16:9 mode, ie it's got all the pixels needed to capture the 16:9 image, and isn't just stretching a lesser set of pixels to do it. SOME little, recent Sony camcorders do this; many more serious ones do; but not all! I did say "full detail for both aspect ratios". If you have a 16:9 CCD, then your 4:3 footage will crop the left/right of the image, losing quality. I'm not sure if that's the case. Consider the 'norm' of 720 x 576 (achieving a 4:3 ratio). By my calculations that works out at 720 x 576 px = 414,720 px. It varies from camcorder to camcorder, but (for example) my DCR-TRV80E comes with 2.1 Mpx CCD. This obviously gives a huge overhead when only 414,720 px is used. Even very low-end camcorders come with 800 Kpx. If we extrapolate to a 16:9 widescreen image, we're then talking 1024 x 576 to achieve the same resolution., i.e. 1024 x 576 = 589,824 px. Even with our low-end camcorder with an 800 Kpx CCD then there's still an appreciable overhead. Obviously in practice the camcorder's DSP uses all the available CCD pixels by interpolation to give the best possible resolution. But the bottom line is that there are more than sufficient CCD pixels to resolve both 16:9 and 4:3 display ratios - so why should there be a drop in resolution. In practice with my 80E, shooting in WS (16:9) and in 4:3 show no discernible drop in resolution - at least not to my tired old eyes :-) Having said all that, all the MiniDV camcorder specs/reviews that I've seen seem to quote between 510 and 520 lines resolution - both for 4:3 and for 16:9. So the limiting factor seems to be the media (i.e. MiniDV). And since the line resolution is in the horizontal axis, it seems to suggest that whether 16:9 or 4:3, there's no difference. If my logic is flawed perhaps you can point out just where it falls down? But to the OP, the answer has already been given - if he shoots at 4:3, then he should edit and produce his video at 4:3 - if he shoots at 16:9 then he should edit and produce his video at 16:9. And the 'banding' L/R or top/bottom will depend on the aspect ratio of his TV screen (or his PC display). -- Tony Morgan |
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#6
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| On Feb 2, 10:44 pm, Tony Morgan wrote: In message , G Hardy writes "David Pearson" wrote in message In message, G Hardy writes If you shoot 16:9, or if you crop your 4:3 footage to 16:9 during the edit, you'll lose detail. The *only* way to get full detail for both aspect ratios without changing cameras is to use an anamorphic lens. ... or a camera with a "true" 16:9 mode, ie it's got all the pixels needed to capture the 16:9 image, and isn't just stretching a lesser set of pixels to do it. SOME little, recent Sony camcorders do this; many more serious ones do; but not all! I did say "full detail for both aspect ratios". If you have a 16:9 CCD, then your 4:3 footage will crop the left/right of the image, losing quality. I'm not sure if that's the case. Consider the 'norm' of 720 x 576 (achieving a 4:3 ratio). By my calculations that works out at 720 x 576 px = 414,720 px. It varies from camcorder to camcorder, but (for example) my DCR-TRV80E comes with 2.1 Mpx CCD. This obviously gives a huge overhead when only 414,720 px is used. Even very low-end camcorders come with 800 Kpx. If we extrapolate to a 16:9 widescreen image, we're then talking 1024 x 576 to achieve the same resolution., i.e. 1024 x 576 = 589,824 px. Even with our low-end camcorder with an 800 Kpx CCD then there's still an appreciable overhead. Obviously in practice the camcorder's DSP uses all the available CCD pixels by interpolation to give the best possible resolution. But the bottom line is that there are more than sufficient CCD pixels to resolve both 16:9 and 4:3 display ratios - so why should there be a drop in resolution. In practice with my 80E, shooting in WS (16:9) and in 4:3 show no discernible drop in resolution - at least not to my tired old eyes :-) Having said all that, all the MiniDV camcorder specs/reviews that I've seen seem to quote between 510 and 520 lines resolution - both for 4:3 and for 16:9. So the limiting factor seems to be the media (i.e. MiniDV). And since the line resolution is in the horizontal axis, it seems to suggest that whether 16:9 or 4:3, there's no difference. If my logic is flawed perhaps you can point out just where it falls down? But to the OP, the answer has already been given - if he shoots at 4:3, then he should edit and produce his video at 4:3 - if he shoots at 16:9 then he should edit and produce his video at 16:9. And the 'banding' L/R or top/bottom will depend on the aspect ratio of his TV screen (or his PC display). -- Tony Morgan- Hide quoted text - - Show quoted text - Hello again. I wondered if anyone may posess a Sony Handycam DCRHC35E and if so is there a way of switching 16.9 aspect ratio on and off? It mentions something in the user guide regarding this but I found it a bit confusing! What is "letterbox" and basicaly if I want to view in widescreen (my tv is widescreen) and edit my footage/create DVDs in widescreen (using adobe premier elements 3.0) having first selected this option, what setting should I use initially on my camcorder - assuming this "setting" exists? regards melianbriggs |
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#7
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| "Tony Morgan" wrote in message ... In message , G Hardy writes "David Pearson" wrote in message In message, G Hardy writes If you shoot 16:9, or if you crop your 4:3 footage to 16:9 during the edit, you'll lose detail. The *only* way to get full detail for both aspect ratios without changing cameras is to use an anamorphic lens. ... or a camera with a "true" 16:9 mode, ie it's got all the pixels needed to capture the 16:9 image, and isn't just stretching a lesser set of pixels to do it. SOME little, recent Sony camcorders do this; many more serious ones do; but not all! I did say "full detail for both aspect ratios". If you have a 16:9 CCD, then your 4:3 footage will crop the left/right of the image, losing quality. I'm not sure if that's the case. Consider the 'norm' of 720 x 576 (achieving a 4:3 ratio). By my calculations that works out at 720 x 576 px = 414,720 px. It varies from camcorder to camcorder, but (for example) my DCR-TRV80E comes with 2.1 Mpx CCD. This obviously gives a huge overhead when only 414,720 px is used. Even very low-end camcorders come with 800 Kpx. If we extrapolate to a 16:9 widescreen image, we're then talking 1024 x 576 to achieve the same resolution., i.e. 1024 x 576 = 589,824 px. Even with our low-end camcorder with an 800 Kpx CCD then there's still an appreciable overhead. There's a very slight flaw in your maths, because you're mixing square and nonsquare pixels. Extrapolating 720x576 at 4:3 to a 16:9 equivalent gives 960x576. Obviously in practice the camcorder's DSP uses all the available CCD pixels by interpolation to give the best possible resolution. But the bottom line is that there are more than sufficient CCD pixels to resolve both 16:9 and 4:3 display ratios - so why should there be a drop in resolution. For DV or DVD cameras, the number of pixels is a red herring. If you have more than 720x576, they will be sampled down. Ideally, as you state, the sampling should take place after the crop (although the cynic in me wonders if this happens, because it's cheaper* to crop after the sampling). The statement I made is very much subjective - a bit like saying that a DVD encoded at 7mbps will be better quality than the same footage at 6.5mbps. A high pixel count CCD on a video camera will most likely be a 4:3 aspect ratio. Assuming that's true, and assuming square pixels, a 2.1MP CCD equates to 1673x1255px. For 4:3 footage that works out at 5 CCD pixel samples per DVD pixel output. To get the best 16:9 footage out of the same CCD, you'd only be using 1673x941px - which when translated to DVD resolution works out at 3.8 CCD pixel samples per DVD pixel output. The same is true if you start with a 16:9 ratio CCD, but it's the 4:3 mode that "loses" quality. The figures work out differently if you use the actual resolution of the CCD rather than my "worked back" figures that are based on 2.1MP, they are also different if your CCD has nonsquare pixels, but the principle is the same. So that's the basis of saying that the only way to get equal quality between 4:3 and 16:9 footage recorded using the same CCD is to use bendy glass on the front of the camera, not electronics within it... That way you're using _all_ of the CCD (whatever its dimensions) to record _both_ aspects. * I'm working from a basis of assumption & ignorance, but the maths holds true. For example, I've assumed (as you have) that the camera companies will attempt to use all of the CCD output to its best. I reckon it's cheaper to sample a big CCD down to 720x576 and then crop the resulting video to widescreen because the routines already exist in older cameras to crop footage of that size. |
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