While attempting to transfer some old VHS home video tapes as well as TV clips that I've collected over the years, I've noticed that the video signal will be nice and bright then suddenly go very dark then slowly return to a nice bright level.(audio is unaffected) It does not do this with my DV transfers, just from VHS tapes. I realize that if one were to attempt to copy Macrovison encoded tapes that this is to be expected but why home made tapes ? Some of these VHS tapes are copies made from 8mm video and Hi8 video transfers, some are not. Can anyone explain this phenomenon and how/if it can be eliminated ?
Dave Babbitt