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  1. Analog videotape has timing and synch problems due to the physical mechanics of the system. Factors such as the rotating tape head, pinch rollers and capstan (causing a very small amount of tape stretch), temperature and humidity... these all have a detrimental effect on precise timing. It has nothing to do with how new a tape is, other than to say a poorly recorded old worn out tape will tend to have even more serious timing issues than a newer one will. In the professional broadcast and editing world, full frame TBC's are a necessity for all analog videotape output.

    The TBC's in consumer VCR's and DVD recorders (and even in devices like the Canopus ADVC-300) are Line TBC's and do not sample and correct the timing of the entire frame (two fields). That's why they do not defeat Macrovision or other tape copy protection signals.

    A full frame TBC may fix your capturing problem because it will completely strip, correct and replace the timing synch signal frame by frame.
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    Originally Posted by gshelley61
    Analog videotape has timing and synch problems due to the physical mechanics of the system. Factors such as the rotating tape head, pinch rollers and capstan (causing a very small amount of tape stretch), temperature and humidity... these all have a detrimental effect on precise timing. It has nothing to do with how new a tape is, other than to say a poorly recorded old worn out tape will tend to have even more serious timing issues than a newer one will. In the professional broadcast and editing world, full frame TBC's are a necessity for all analog videotape output.

    The TBC's in consumer VCR's and DVD recorders (and even in devices like the Canopus ADVC-300) are Line TBC's and do not sample and correct the timing of the entire frame (two fields). That's why they do not defeat Macrovision or other tape copy protection signals.

    A full frame TBC may fix your capturing problem because it will completely strip, correct and replace the timing synch signal frame by frame.
    A perfect follow-up explanation to my lazy one-liner.
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