Movie QC came back with "Misfire and bump"?

[Danny Rogers]

Hi all, Just received the QC on a movie I've been working on and don't understand some of the issues listed.

Misfire and bump
Density Shift
Step in motion


Can anyone tell me what they are talking about?
Thanks

 

[Phil Holland]

Misfire could be a false rolled take perhaps? That's a new one for me.

Bump usually refers to somebody banging or lightly tapping the tripod or camera and it shows in shot. This often can occur if an AC grabs the follow focus during a take too without using a soft entry grip.

Density Shift is interesting. Haven't heard something like this in a while, but could be in relationship to black levels or lighting variations that occurred during several setups perhaps.

Step in motion..... Maybe a jagged move during a pan or tilt or dolly move? Maybe?

 

[Eric M Hurt]

Hi all, Just received the QC on a movie I've been working on and don't understand some of the issues listed.

Misfire and bump
Density Shift
Step in motion


Can anyone tell me what they are talking about?
Thanks

A QC report is more about how well it will dub for a distributor. My guess is these things are more about how the frames are all working, not about if the tripod was bumped or not. You should be able to call the house that did the work and get all of the answers you need.

 

[Marc Wielage]

I agree with Eric above: "misfire" is not a valid technical term. "Early color correction," "late color correction," "flash frame," "video noise," "black frame"... these are all real, valid terms.

"Bump" I have seen used with film transfers where there's a vertical shift due to a bad splice, but I prefer "vertical shift at splice" or something like that. I have no idea what "step in motion" means. They're making crap up.

The BBC has a good list of QC standards:

http://www.bbc.co.uk/guidelines/dq/pdf/tv/TechnicalDeliveryStandardsBBCv3.pdf

I find it's generally far, far easier to pass video QC than it is audio QC. There's all kinds of audio issues that come up in delivery, but as long as the video levels are reasonable, the chroma isn't getting too extreme, there isn't a lot of noise or artifacts, the scenes basically match in terms of color and brightness, then their margins for acceptability are actually pretty wide.

Who QC'd this film and what country is this in?

 

[Bob Gundu]

I don't know... sounds like someone didn't like the dance moves in the film.