22 Sep
2009
22 Sep
'09
8:49 a.m.
Jens M Andreasen wrote:
On Mon, 2009-09-21 at 17:51 -0400, Paul Davis wrote:
Yes, as I mentioned before, I started my tape recorder most times with a
pre-roll around 2 bars, at 120BPM 2 bars are 4 seconds, but I only did
it for audio at home. I worked for professional video studios and IIRC
vsync needs some kind of additional BNC video connection.
its also true that there are variants of SMPTE
that include subframes,
which certainly help the accuracy, but its not clear to me how
commonly this information is actually passed around.
You will always have quarter-frames. No EBU/SMPTE without them. If you
have the "real" signal, you will then also have the 1KHz bi-phase to
adjust to. Once locked, you have the video signals pixel-precise
vsync ..
Locate isn't that critical, would normally be set to place you 4 - 5
seconds before the actual event (to give you a reasonable count-in) and
the punch-in/out would then either be performed from a cue-list or just
manually.