DVL-Digest 677 - Postings: Index control 2 DV decks in realtime Crystal Ball Gazing - HDTV roa GL1 - not valid compression format error Multiple Shots of Characters control 2 DV decks in realtime - Adam Wilt I want to record a scene from different angles using 2 DV cameras time > syncd together. What I want to be able to do is to replay both tapes > using 2 DV decks and sync the replay together using the DV timecode. I > would like this to be done through a GUI and if possible have both > images on the same screen at the same time... > Needs are: play, fast forward, reverse, step etc with one deck being > master and the other slave with slave following DV timecode of master. > When fast forwarding slave should stop at point where master has > stopped. A small frame margin error is allowed during normal play. > However the slave hh:mm:ss:ff must be able to be adjusted to the master > hh:mm:ss:ff during frame step. I need to have both channels dd:mm:yyyy > :hh:mm:ss:ff displayed on the GUI and not within the video.... > > Have you done it? Yes. > Do you know how it can be done? I wrote a multi-VTR controller specifically for this purpose. Runs under Mac OS 8.5+ with a limited GUI for test purposes. Intention was for other folks to control it through AppleScript. Written for controlling pro decks using RS-422, but works (albeit more slowly) with Addenda Electronics RS/4-L adapters to drive LANC decks as well. Tolerable with faster VTRs like DSR-20s but painful with slow transports like GV-D900s. > Can you help? Possibly. The chap I wrote it for was planning to release it under GPL, but I don't know what the status of it is. It may be possible to get his OK to send it to you or sell you a copy. > Do I need bespoke software? Well, we couldn't find anything off the shelf, so we wrote it. Mitchell, are you on the list these days? What's the legal status of GangRoller? Cheers, Adam Wilt Crystal Ball Gazing - HDTV roa - Adam Wilt Full HD wouldn't run at 100Mb/s, but shouldn't be a problem at 400Mb/s, > assuming the same level of compression we're using today for SD-DV. We're running HDCAM-compressed HD (135 Mb/sec for the video stream) over S400 FireWire. DVCPRO HD (and D-9 HD when it happens) are 100 Mb/sec for the video content and should be equally easy to handle. Cheers, Adam Wilt GL1 - not valid compression format error - Adam Wilt >i have a problem and could use sum real help. I have a Canon GL1 Digital > Camcorder and just got a firewire card and Adobe Premier. What kind of computer, what OS, what FireWire card? > "not valid compression format vids:dvsd". This implies the DV codec isn't properly installed or registered (possibly whatever Premiere Plugins the capture card was supposed to install didn't make it into the Premiere plugins folder). "dvsd" is the standard code for the standard-definition DV codec, but Premiere doesn't appear to want to have anything to do with it. Assuming the capture card is compatible with Premiere (is it?), you typically need to install Premiere first, then the capture card, so that the plugins are properly set up. Multiple Shots of Characters - Adam Wilt Looking to do a special effect. If I want a single composed shot, but > with 1 actor doing 3 different things at once...how can I do this without > a green/blue screen?... > Going to be using Premiere... As long as the clone don't cross each other or overlap, animating a hand-painted matte with a slightly softened edge is likely to give you the best results. If they overlap or cross, then a difference matte may be the best bet. Lock down the camera for the shot, and get some pix of the empty location. Then employ the Difference Matte, using the empty scene as the matte generator to key out everything but your actor. Layer the three shots of the actor in video tracks 2, 3, & 4 as needed for proper Z-ordering (depth prioritization, so that the correct clone walks in front of the others) and super over the shot of the empty set. If clone #2 needs to walk in front of clones 1 & 3, then in back of them, start clone 2 on video 2, then cut all three supered clips and swap layers, with clone 2 moving to track 4 and clines 1 & 3 moving to tracks 2 & 3, to change the Z-ordering. You may need to do some frame-averaging of the matte source to reduce per-frame noise and allow the pulling of a clean key. In all cases unless you have an automated motion-control rig you're best off ensuring the camera is *really* locked down and immobile (also be sure that you lock the exposure and focus!). To avoid jiggling it, I'd suggest taking an analog or FireWire feed off of it into a separate deck for recording the on-set playback tapes that the actor in the 2nd/3rd passes will react to, rather than changing tapes in the camcorder itself. Cheers, AJW (diese posts stammen von der DV-L Mailingliste - THX to Adam Wilt and Perry Mitchell :-) [up] |
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