[LAD] interesting blog post about syncing blender and ardour

Ralf Mardorf ralf.mardorf at alice-dsl.net
Tue Sep 22 10:49:35 UTC 2009

Jens M Andreasen wrote:
> On Mon, 2009-09-21 at 17:51 -0400, Paul Davis wrote:
>> 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.

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.

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