Frame mode : Jerky when slowing down in post-prod at DVinfo.net

Dany Nativel · February 19th, 2003, 12:21 PM

Most of the time I use the Frame mode of my GL2 to shoot and understand the limitation regarding fast pans and other quick camera movements.

Recently, I've imported some footage in Vegas 3. No problem at normal speed. But if I use the velocity curve or change the speed of the clip the result is not good at all (see very jerky). I set the "resample" option for this clip (important when slowing down) but it doesn't help.

If I do the same thing with footage shot in Normal mode... I can slow down or speed up without any problem.

Can somebody explain me why I get this weird result and if it only comes from Vegas ?

Thank you
Dany

Don Donatello · February 19th, 2003, 02:30 PM

basically .. if you pan from point A to B in 1 sec frame mode will break/record that distance into 30 pieces of movement ... normal mode will break/record that same distance into 60 pieces of movement ...

having 60 pieces of info ( motion) is much smoother then only having 30 pieces of info ( motion) ...

when you attempt slo motion .. your editor only has 30 pieces of movement to work with VS. 60 pieces of movement using normal mode .. the more pieces of info ( motion/movement) the smoother the results ...

also IMO do not use above 1/60 shutter in frame mode if you want smooth pan/motion .. only use above 1/60 if you like the "jerky " effect ..which can be a excellent effect ...

Dany Nativel · February 19th, 2003, 03:57 PM

I like the Frame mode look but also love to slow down action when necessary (wedding is a good example).

What can I do to keep the frame mode while being able to slow everything down ?

Any software or artifacts ?

Thanx
Dany

Ken Tanaka · February 19th, 2003, 04:11 PM

There are several products that can assist in time-adjustments. "Twixtor" from Re:Vision Effects is a good example. It plugs into Final Cut Pro, After Effects, Commotion and Combustion and really does a good job with some practice.

Dany Nativel · February 19th, 2003, 04:19 PM

Thank you.

Any solution/plugins for Vegas 3.0 (or 4.0) ?

The velocity curve is so convenient ;)

Ken Tanaka · February 19th, 2003, 04:22 PM

I'm unfamiliar with Vegas Video, but if it can take After Effects-compliant plug-ins, the chances are that Twixtor will work with it just fine with it.

Brian M. Dickman · February 19th, 2003, 07:06 PM

Unfortunately no, Vegas can not work with Premier plug-ins. One of the plugin developers is looking into a converter/adaptor plugin, but at this point, there is no way to use plugins for anything other than Vegas in Vegas.

I'd suggest you go ask this question over on the Sonic Foundry forums. If I've got some time, I'll try it out as well (I've got a GL2 and Vegas 4).

Don Donatello · February 19th, 2003, 09:49 PM

i shoot 90% frame mode at 1/60th shutter .... slo mo looks very good .. only on a swish pan do i get a jerky pan in slo-mo ...

check your tape to see what shutter speed you shot the clip.

i also use Vegas .. it has a very good slo-mo

February 19th, 2003, 12:21 PM	#1
Dany Nativel Regular Crew Join Date: Dec 2002 Location: Odenton, MD Posts: 106	Frame mode : Jerky when slowing down in post-prod Most of the time I use the Frame mode of my GL2 to shoot and understand the limitation regarding fast pans and other quick camera movements. Recently, I've imported some footage in Vegas 3. No problem at normal speed. But if I use the velocity curve or change the speed of the clip the result is not good at all (see very jerky). I set the "resample" option for this clip (important when slowing down) but it doesn't help. If I do the same thing with footage shot in Normal mode... I can slow down or speed up without any problem. Can somebody explain me why I get this weird result and if it only comes from Vegas ? Thank you Dany

February 19th, 2003, 04:11 PM	#4
Ken Tanaka Retired DV Info Net Almunus Join Date: Dec 2001 Location: Chicago, IL Posts: 6,943	There are several products that can assist in time-adjustments. "Twixtor" from Re:Vision Effects is a good example. It plugs into Final Cut Pro, After Effects, Commotion and Combustion and really does a good job with some practice. __________________ Lady X Films: A lady with a boring wardrobe...and a global mission. Hey, you don't have enough stuff! Buy with confidence from our sponsors. Hand-picked as the best in the business...Really! See some of my work one frame at a time: www.KenTanaka.com

February 19th, 2003, 04:22 PM	#6
Ken Tanaka Retired DV Info Net Almunus Join Date: Dec 2001 Location: Chicago, IL Posts: 6,943	I'm unfamiliar with Vegas Video, but if it can take After Effects-compliant plug-ins, the chances are that Twixtor will work with it just fine with it. __________________ Lady X Films: A lady with a boring wardrobe...and a global mission. Hey, you don't have enough stuff! Buy with confidence from our sponsors. Hand-picked as the best in the business...Really! See some of my work one frame at a time: www.KenTanaka.com

February 19th, 2003, 02:30 PM	#2
Don Donatello Hawaiian Shirt Mogul Join Date: Nov 2001 Location: northern cailfornia Posts: 1,261	basically .. if you pan from point A to B in 1 sec frame mode will break/record that distance into 30 pieces of movement ... normal mode will break/record that same distance into 60 pieces of movement ... having 60 pieces of info ( motion) is much smoother then only having 30 pieces of info ( motion) ... when you attempt slo motion .. your editor only has 30 pieces of movement to work with VS. 60 pieces of movement using normal mode .. the more pieces of info ( motion/movement) the smoother the results ... also IMO do not use above 1/60 shutter in frame mode if you want smooth pan/motion .. only use above 1/60 if you like the "jerky " effect ..which can be a excellent effect ...

February 19th, 2003, 03:57 PM	#3
Dany Nativel Regular Crew Join Date: Dec 2002 Location: Odenton, MD Posts: 106	I like the Frame mode look but also love to slow down action when necessary (wedding is a good example). What can I do to keep the frame mode while being able to slow everything down ? Any software or artifacts ? Thanx Dany

February 19th, 2003, 04:19 PM	#5
Dany Nativel Regular Crew Join Date: Dec 2002 Location: Odenton, MD Posts: 106	Thank you. Any solution/plugins for Vegas 3.0 (or 4.0) ? The velocity curve is so convenient ;)

February 19th, 2003, 07:06 PM	#7
Brian M. Dickman Regular Crew Join Date: Sep 2002 Location: Portland, OR Posts: 148	Unfortunately no, Vegas can not work with Premier plug-ins. One of the plugin developers is looking into a converter/adaptor plugin, but at this point, there is no way to use plugins for anything other than Vegas in Vegas. I'd suggest you go ask this question over on the Sonic Foundry forums. If I've got some time, I'll try it out as well (I've got a GL2 and Vegas 4).

February 19th, 2003, 09:49 PM	#8
Don Donatello Hawaiian Shirt Mogul Join Date: Nov 2001 Location: northern cailfornia Posts: 1,261	i shoot 90% frame mode at 1/60th shutter .... slo mo looks very good .. only on a swish pan do i get a jerky pan in slo-mo ... check your tape to see what shutter speed you shot the clip. i also use Vegas .. it has a very good slo-mo