DVL-Digest 917 - Postings: Index CLEANER DVD VCD??. Get Final Cut Pro 2.0 for !!! Interlaced video Progressive Scan In 16:9 Cameras. Twitter (was XL1S picture and info on DV.com) XL1S picture and info on DV.com CLEANER DVD VCD??. - "Perry" From: Crazyhorse Pictures Hi Dave. THANKS for that. Trying to teach an old cameraman new tricks!:-) . My only problem now is to try to find the PAL DVD formats specifications!?. Searched the net but nothing!. I reallise the frame rate will be 25fps but whats the resolution?. VCD (pal) is 352 x 288??. Or does it matter??. Get Final Cut Pro 2.0 for !!! - "Perry" Jim Feeley posted: >What is Apple thinking? Ya, not everyone can take a week off to take advantage of this sort of offer, but this sort of action give creedence to the line of thought that Apple's not too concerned with FCP pirated because every pirated version must run on a Power Mac. So I guess the Mac is the dongle.< This theory doesn't tie in with Apple's failure to offer FCP2 discounted with a G4 purchase, or offered to OEM deals for discounted sales with video boards like the Matrox RTMac. At least that is the situation here in PAL land. Perry Interlaced video - "Perry" I think you have slightly confused things Steve! All current camera CCDs (excepting Philips broadcast) do in fact always capture progressive scan. The output is then modified by averaging line pairs as we have previously explained. There is nothing to stop a manufacturer from NOT doing the line pair trick, and then missing out alternate fields and using the full scan first field as the frame. It would lose sensitivity (a stop) and gain noise (3dB) but it would work fine. It would look 'different' to what we are used to (OK Adam?) and I know of no manufacturer that has chosen to do this on a prosumer type camera. The only real movie benefit would be for transfer to 35mm film or a full progressive video system. In practice I suspect the line pair trick is locked into the CCD chip set, and it is therefore impossible to avoid without a fundamental redesign. Perry Progressive Scan In 16:9 Cameras. - "Perry" From: Edoardo Nolfo Does anybody know whether the JVC DV700 16:9 camcorder has true progressive scan at 25 fps (i.e. with no interpolation)? I have seen a TV show that was broadcast live with 16:9 cameras and its resemblance to the feel of film was amazing: how did they do it? Does this camera have any other useful "filmlook" settings? Twitter (was XL1S picture and info on DV.com) - "Perry" From: Stephen van Vuuren Is what you and Perry describing similar to overcranking the sharpness setting in AE or similar program? What I don't quite understand is why progressive recording in of itself causes "twitter". It must be frame rate depedendent as well. Will 60P images "twitter"? XL1S picture and info on DV.com - Adam Wilt > ] ...As I've mentioned a few times before, a true progressive 30fps > > camera would be near unwatchable on an interlaced display due to > > 'twitter'... > > I don't buy this because the true 30FPS on cheap Canon 1-chips is quite > watchable. The true 30fps on the 1-chip Canons appears to use dual-line readout just like interlaced mode; switching between interlaced and proscan while shooting a static resolution test chart shows no visible change in the picture. Therefore the image is vertically filtered to reduce twitter. > Even the 24P off the CineAlta was watchable despite the flicker. Because the line structure is so much finer, the visibility of twitter may be lowered. I do not know what vertical filtering (dual-line readout or other processing) is used in the CineAlta; I haven't had the luxury of doing tests on it. You wouldn't have one I could borrow, would you? ;-) > Do you have some examples of 30P that display this effect. Have not seen > it yet myself. Grab yourself a DSR-300 or DSR-500WS, stick it on a tripod, and toggle between normal shutter and EVS mode (enhanced vertical sharpness). Or get a PD150 or VX2000, lock it down on a tripod, and go between proscan and interlaced. if you have any crisp, fine, contrasty vertical details (i.e., thin bright horizontal lines) in the image, you'll see them twitter at 30 Hz. The brighter and more contrasty your display, the more the twitter jumps out at you. "Unwatchable" is a relative concept. It's flickery compared to interlace, but if all you watch is proscan on an interlaced display, it becomes part of the look, just like the 48Hz flicker from a 24p segmented-field HDCAM output. Cheers, Adam Wilt (diese posts stammen von der DV-L Mailingliste - THX to Adam Wilt and Perry Mitchell :-) [up] |
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