Bizzarrrrrro HD Clip behavior – Help
by Herb Sevush
on
Jun 27, 2008 at 6:10:07 pm
Bizzarrrrrro HD Clip behavior –
Source footage is DVCPRO HD 720P30. Easy setup, sequence settings all match. Some clips - not all – shift by about 2 frames when they render. With these “bad” clips you can see the shift happen most easily by setting their composite mode to “travel matt – luma” – as soon as you click on this setting the red render line comes on and you can see the clip shift by about 2 frames – easiest to spot in a clip with action. It doesn’t have to be the composite mode – anything that causes the red render bar to come on will cause this shift.
I have tried
Using the render manager to delete all renders
Trashing preferences
Reinstalling the blackmagic decklink driver
I then moved this clip to another FCP machine and the behavior was the same.
Unless someone comes up with an idea I will recapture the clips that are acting this way but this is part of a huge job where some clips exhibit this behavior and some don’t, with no difference in their clip properties.
For the record:
OSX 10.4.11
FCP 6.0.3
Quicktime Player 7.4.5
Decklink Driver 6.7.1
The clips were captured HD SDI from a Panasonic 1200A.
Of the 2 systems I tested them on, 1 was a G5, 1 a Mac Pro.
Re: Bizzarrrrrro HD Clip behavior – Help by Aaron Neitz on Jun 27, 2008 at 6:15:40 pm
We had the same problem with DV50 media. Drove us insane.
try this: take one of the 'bad' clips, make a duplicate:
Use Cinema Tools to reconform the frame rate (so 29.97 in your case). There seems to be some secondary QT rate flag that sometimes doesn't get dealt with properly in FCP, and so when you render it picks the wrong rate flag hence the shift.
Then relink in FCP to this new duplicate media file and see if it works. Chances are it will relink to the 2 frames off rather than what RT was doing.
Re: Bizzarrrrrro HD Clip behavior – Help by Herb Sevush on Jun 27, 2008 at 7:52:28 pm
Aaron -
I would very much like to kiss you for that tip - but being that I'm overwight, balding, grey and grizzly, I'm guessing that my simple thanks will be better sppreciated.
What's strange is that in Cinema Tools the "offending" clips are listed as having a speed of 29.96 as opposed to 29.97. After conforming they behave properly.
