Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!usc!sdd.hp.com!spool.mu.edu!uunet!kddlab!titcca!wnoc-tyo-news!scslwide!wsgw!headgw!cvgw!yamanaka From: yamanaka@cv.sony.co.jp (Brian Yamanaka) Newsgroups: comp.sys.amiga.graphics Subject: Re: Single Frame recorders Message-ID: Date: 25 Mar 91 04:04:21 GMT References: <5240@mindlink.UUCP> Sender: news@cv.sony.co.jp (Usenet News System) Organization: Sony Corporation, Consumer Video Group Lines: 50 In-reply-to: Ken_Cooper@mindlink.UUCP's message of 22 Mar 91 23:08:47 GMT In article <5240@mindlink.UUCP> Ken_Cooper@mindlink.UUCP (Ken Cooper) writes: Ken Cooper writes: >>Brian YAMANAKA/Sony Corporation, Personal Video Group writes: >> >> Time-code is a RSN feature of some consumer products (look at my sig >> and see how I know), but this still won't allow inexpensive >> single-frame recording. The problem is not in the electronics, but in >> the mechanical constraints. Single frame recording records the VCR >> to remain in pause for a considerable amount of the time. Contrary >> to what some might believe, this puts the most amount of wear on a >> VCR and the tape. (That's why most VCR's will release pause after >> several minutes.) In addition to pause the VCR must backspace and >> pre-roll to the next insert point to insure proper video sync. >> >>------ > >As limited as my knowledge is regarding the mechanics of VCR's, it seems that >there should be a simple solution for single framing. Just look at how a 35mm >cine setup is constructed. The film is in position, registered and just sits The difference here is that 35mm film has actual guides (the holes on both sides) which allow the frames to be positioned and held in position. Video on the other hand relies on signals (control track) recorded on the tape. In order to read the signal the tape must actually be played to determine the start and end of a frame (which is actually two video fields). >there. No stretching, no motors running etc. When some data is finally dumped >onto the film, an iteration happens and its back to standby mode again. > >I get the feeling that when using a VCR, we are using a thorough-bred unit, >when all we need is something that works like a mule :) I wish this were true, but single-frame recording requires a thorough-bred and not a mule. The best solution is just to avoid a VCR and use a laser disc recording system. Of course this is expensive, but until digital recording becomes common (ala SuperMAC) laser disk is the best solution. (Personally I'm waiting for digital recording to become available on the Amiga) Best regards. -- ------------------------------------------------------------------------------ Brian YAMANAKA (aka The VISCA dude) |"I knew I should have made that Sony Corporation, Personal Video Group | left turn at Alburqurque." Email: yamanaka@cv.sony.co.jp | -Bugs Bunny ------------------------------------------------------------------------------