help me find a workaround: offline dv to online uncompressed SD from Beta SP dub of DigiBeta telecine master

[Daryl K davis]

Why would the timecode be different on DV than it is on the BetaSP or Digi-Beta? If it’s a direct clone they would be jamming timecodes would they not? If you are concerned about the integrity of timecode on the DV format I wouldn’t lose any sleep. It is a good idea to capture via RS-422 port instead of firewire deck control. That is usually where the frame accuracy can be variant. But that is a DV deck issue and not a timecode issue on the actual DV tape.

————————-
DK Davis / Editor/ Post Super
————————-

[Jonas Espinoza]

is that true? this is a dv copy of the master digibeta telecine, the other concern is that when we get our working copy on betasp to capture uncompressed that will be another generation that could have timecode issues? do all dub facilities put out dv, analog betasp and digibeta clones of each other with frame accurate timecode? does this question make sense?

[Peter]

I believe the answer you are looking for is a clone is a clone. I would use 9 pin from the dv deck to be certain if you have worries of time code.

[Zman]

if your only using the DV for the offline just put a window burn in there from the digi beta. then you will be able to see the TC when you offline and will have frame accuracy for the online from the digi beta.

where ever you heard the bars/first frame thing is a whopping load of BS, if TC drifts or jumps it can happen anywhere.

[Jonas Espinoza]

its not drift im worried about. with dv it seems to often be running timecode so as soon as the thing starts actually recording during the dub, thats when it thinks its 00;00.

i just havent seen the telecine set-up and have no idea how the dv deck was slaved during the dub… the dv i’m getting for starters is just a client copy. but in your experience the dv that comes with a digibeta dub is frame for frame the same as the master?

add to that the fact that for our working/capture we will have to get a betaSP dub of the digibeta telecine master, is that the way they do it is when they make dubs, it is literally a TC slaved dub?

the digibeta and dv are already done, the BetaSP copy will be made so as to be able to use the deck i have access to at work. youre telling me that i can trust the timecode on the dv and just recapture via the 9-pin of the uncompressed capture card.

[Zman]

ok i see what your asking, here are the rules so to speak. mini DV does not have time code it’s clock time, dv cam has TC, so what most people do to get a mini dv tape clone of the master with a window burn in the lower corner to have a visual of the master TC for frame to frame acuracy. now the beta is a dub of the digi beta with exact TC from the digi beta. So not to worry about that. all you have to ask is for them to “REGEN THE TIME CODE” which is regenerating the original TC onto the new tape. here is a few terms to remeber, a “DUB” is an ANALOG copy of any format tape. a “CLONE” is a digital copy of a digital tape, in the digital world you get an exact of the original, in analog you get a generation lower.

[Bryce Whiteside]

If they record to something like a Sony DSR-45 the timecode should match.

I use to dub component and TC out of a Sony PVW-2800 to the DSR-45 component and TC in. The DSR-45 was set to external timecode when it was put in record mode. For an extra measure of safety, I made sure the NDF/NDF or DF/DF matched from the Beta tape to the timecode setting of the DSR-45.

The same will hold true for Panasonic broadcast DV decks.

Spot checking I didn’t notice any drift, but if there was some it would only be a frame or two.

Matching the timecode of either a Beta SP or Digibeta is doable.

HTH,
Bryce

Don’t worry Mr. B. I have a cunning plan…

PowerBook 1.67 Ghz ATI 9700 128 MB 2 GB
Final Cut Pro HD
DVD Studio Pro 3
Motion