harald@ccicpg.UUCP ( Harald Milne) (08/08/87)
Using a security system VCR will yield just what it was designed for. A single frame of the robber holding up your store. It does not attempt to animate. (Unless you want to see frames of the robber getting holes, ala ROBOCOP). It just does not work. To do single frame animation, you have to pre-roll and record. (Unless you don't care about vertical glitching or frame continuity) And if your trying to do it with VHS, forget it. VHS uses a cheap and sloppy motion control. The only exception may be a VCR reported in Electronic Engineering Times, I think by Panasonic(Matshushita) using the same proven and true Beta Drive. (And Professional). Good luck since you will need a lot. -- UUCP: uunet!ccicpg!harald
milo@ndmath.UUCP (Greg Corson) (08/09/87)
in article <1779@ccicpg.UUCP>, harald@ccicpg.UUCP ( Harald Milne) says: > > ala ROBOCOP). It just does not work. To do single frame animation, you have > to pre-roll and record. (Unless you don't care about vertical glitching or > frame continuity) And if your trying to do it with VHS, forget it. So, how about the EVC8 dual deck 8mm editing system from SONY? Assuming it has frame accurate edit points and preroll would it work? Has anyone actually seen this thing? Also, I was under the impression that there were some of these VCR's running around that did the one-shot recording through built-in preroll control or something. Basically, all I'm interested in is something that can record a frame at a time with no glitches in the video. It doesn't have to be broadcast quality, just reasonablly clean and at a cost under $5000 for the recorder and whatever other hardware is necessary. I don't care what format it records in. Any suggestions? Greg Corson 19141 Summers Drive South Bend, IN 46637 (219) 277-5306 (weekdays till 6pm central) ...seismo!iuvax!ndmath!milo
feb@cblpe.ATT.COM (Franco Barber) (08/10/87)
In article <272@ndmath.UUCP> milo@ndmath.UUCP (Greg Corson) writes: >in article <1779@ccicpg.UUCP>, harald@ccicpg.UUCP ( Harald Milne) says: >> ala ROBOCOP). It just does not work. To do single frame animation, you have >> to pre-roll and record. (Unless you don't care about vertical glitching or >> frame continuity) And if your trying to do it with VHS, forget it. >Also, I was under the impression that there were some of these VCR's >running around that did the one-shot recording through built-in preroll >control or something. >Basically, all I'm interested in is something that can record a frame at >a time with no glitches in the video. It doesn't have to be broadcast >quality, just reasonablly clean and at a cost under $5000 for the recorder >and whatever other hardware is necessary. I don't care what format it >records in. >Any suggestions? >Greg Corson >19141 Summers Drive >South Bend, IN 46637 >(219) 277-5306 (weekdays till 6pm central) >...seismo!iuvax!ndmath!milo I have a Sony SL-HF1000. It prerolls. Honest. I didn't know this when I bought it, then one day I observed a strange phenomenon: When I went from playback-pause to record-pause the machine would back up the tape about half a second. I was at first upset that it did this: I thought it was messing up and recording earlier than I wanted it to. I have since learned through various sources that this is the correct way to do things. I can find out how many frames it rolls back if someone needs to know (did I mention the tape counter that counts Hours:Minutes:Seconds:Frames ?) The only built-in close to single frame mechanism is a six-frame-at-a-time mode. While in recording-pause, a flick of the record switch makes it record six frames then go back into record-pause. I haven't made extensive use of this feature, so I can't comment on how well it works. If the single frame recording is going to be supervised by a person, it should be possible to get better than 6 frame accuracy by flipping back into playback-pause and backing up the tape a few frames. I have always meant to play with this, but I just haven't been able to get around to it. -- Franco Barber AT&T Bell Laboratories, Columbus, Ohio ..!cbosgd!cblpf!cblpe!feb (614) 860-7803
sgf@nancy ( _/**/Sam_Fulcomer ) (08/11/87)
...
Panasonic does make what seems to be a VCR acceptable for animation.
The AG-6500 (list - $3995) is claimed (by the glossy) to have an accuracy
of +/-2 frames. Panasonic tech support claimed that in early life the
6500 should be mostly frame accurate. The published spec for the 6500
accuracy is also the same as the published specs for the AU- and NV-
3/4" lines (list $5k-7k).
I have the impression that the only truly frame-accurate editing can
be had on a machine that moves the drum past a motionless tape to record
the frame and then advances the tape.
Can anyone comment on this?
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TELECOM 401-863-3618brucer@gvgpsa.UUCP (08/15/87)
In article <17653@brunix.UUCP> sgf@nancy.UUCP ( _/**/Sam_Fulcomer ) writes: >I have the impression that the only truly frame-accurate editing can >be had on a machine that moves the drum past a motionless tape to record >the frame and then advances the tape. > >Can anyone comment on this? Our editing systems can make various fixed (rotating, of course, but not translation) head machines -- VPR-3's, etc.. (mostly 1-inch machines - I'm not sure how we do on 3/4" machines, but I think we can do it on them too, or at least come close) execute a frame accurate edit, no problem. It's all in the timing. -mitch hendrickson (...tektronix!gvgpsa!brucer)