jbn@glacier.STANFORD.EDU (John B. Nagle) (07/14/88)
This comes up every few months, but the products change so fast it
needs to be reconsidered frequently. What are the best VCRs for
single-frame record and playback, for applications such as animation
recording and video analysis? Which machines are capable of reliable
frame-by-frame read, with minutes of holding time per frame, without
tape damage? Is anything at the low end suitable for single-frame
write yet? What about 8mm machines?
Also, which machines get the interlace right on still-frame operations,
so that one always gets both halves of the same frame, not two halves of
two different frames?
John Naglearriflex@ihlpe.ATT.COM (Fister) (07/15/88)
In article <17553@glacier.STANFORD.EDU>, jbn@glacier.STANFORD.EDU (John B. Nagle) writes: > > This comes up every few months, but the products change so fast it > needs to be reconsidered frequently. What are the best VCRs for > single-frame record and playback, for applications such as animation > recording and video analysis? Which machines are capable of reliable > frame-by-frame read, with minutes of holding time per frame, without > tape damage? Is anything at the low end suitable for single-frame > write yet? What about 8mm machines? > Im somewhat new to this group and what I say is mostly from a user point of view. I use a Lyon-Lamb VAS4 with a Sony 5850 3/4" deck. We would practically smoke the heads right off deck (more like have the thing rebuilt after every project) If I were you, I would look into frame store devices that have realtime playback. You also might want to think about a movieola and a film camera (you can keep those in pause as long as you want) greg fister (312)979-6927 > Also, which machines get the interlace right on still-frame operations, > so that one always gets both halves of the same frame, not two halves of > two different frames? > > John Nagle
dale@amc-vlsi.UUCP (Dale Wlasitz) (07/15/88)
>.......What are the best VCRs for >single-frame record and playback, for applications such as animation >recording and video analysis? Which machines are capable of reliable >frame-by-frame read, with minutes of holding time per frame, without >tape damage? ....... Most decent video equipment today will produce a good quality still frame. Perhaps not as good as the SONY broadcast 3/4 inch machines but it is still reasonable. The "minutes of holding time per frame" while in the still frame mode is a function of the tape that you are using. I worked in the industry some time back and one of the tests we performed was a "Tape Quality" test. Simply by leaving a machine in pause we measured the time for dropouts to begin showing up on the image. We even left the unit until the image disappeared due to oxide shredding. Amazing results, some brands of tape would last less than six minutes......on the best tape we terminated the test after more than 9 hours. If you want to do animation you'll want to digitize and store the frame in memory so it can be modified. This is expensive, a single frame will eat about 1/2 a Meg of RAM. A Time Base Corrector will provide the store capability, now you need the software and computer interface to massage the image. Good Luck, Dale
bkc@sun.soe.clarkson.edu (Brad Clements) (07/16/88)
From article <17553@glacier.STANFORD.EDU>, by jbn@glacier.STANFORD.EDU (John B. Nagle): > > This comes up every few months, but the products change so fast it > needs to be reconsidered frequently. What are the best VCRs for Ugh, this subject does get beat to death. If you have $75K to blow you can try the sony VPR-1 reel-to-reel 1" machines. So far the most reasonable thing I've seen for a semi reasonable price has been WORM drive systems (panasonic has a few out, Kodak has just come out w/ some, I believe) that can record somewhere around 10 minutes of running video or 30*60*10 frames or twice that in fields.
mic@hpesrgd.HP.COM (Marc Clarke) (07/19/88)
> Amazing results, some brands of tape would > last less than six minutes......on the best tape we terminated the > test after more than 9 hours. > > Dale > ---------- And (breathless pause while the announcer rips open the sealed envelope), the name of the winning tape was... ???
mcragg@gmu90x.UUCP (Maureen Cragg) (07/24/88)
In article <531@amc-vlsi.UUCP>, dale@amc-vlsi.UUCP (Dale Wlasitz) writes: > of the tests we performed was a "Tape Quality" test. Simply by leaving > a machine in pause we measured the time for dropouts to begin showing > up on the image. We even left the unit until the image disappeared > due to oxide shredding. Amazing results, some brands of tape would > last less than six minutes......on the best tape we terminated the > test after more than 9 hours. i'd love to know which... the air drummer
JCB@homxc.UUCP (JCB) (07/25/88)
In article <1230@gmu90x.UUCP>, mcragg@gmu90x.UUCP (Maureen Cragg) writes: > In article <531@amc-vlsi.UUCP>, dale@amc-vlsi.UUCP (Dale Wlasitz) writes: > > of the tests we performed was a "Tape Quality" test. Simply by leaving > > a machine in pause we measured the time for dropouts to begin showing > > up on the image. We even left the unit until the image disappeared > > due to oxide shredding. Amazing results, some brands of tape would > > last less than six minutes......on the best tape we terminated the > > test after more than 9 hours. > > i'd love to know which... > the air drummer I am wondering what people's experience with the higher-quality VHS tapes has been in general use, particularly in camcorder use and editing. Does anyone have any favorites among the more popular brands (Maxell RX, TDK HD-X, Fuji XG)? Have you found differences in the quality of the initial recording. Differences in multi-generation edited copies? Any experiences or opinions would be great. Thanks. JCBrown