Jumping on speeded up panning shots ? at DVinfo.net

Mat Thompson · October 8th, 2009, 12:18 PM

Hi guys

Just a quick question. I have a few panning shots (wide establishers). They are a touch slow for the edit so I've speeded up to 115%! I have horrible jumping in the resulting output! - I have noticed this before but to lesser levels. Can anyone suggest anything ?

Many thanks
Mat

Marty Baggen · October 8th, 2009, 01:06 PM

Mat... you may find a solution with the Field Options (right-click your clip) for the target clip.

If I remember right, I have achieved smooth motion with varied speeds by "interlacing consecutive frames".

Tripp Woelfel · October 8th, 2009, 07:34 PM

Also try turning Frame Blending off (right click clip and de-select)and render a preview to see if it works better.

Bob Hart · October 9th, 2009, 12:07 AM

Your faster playback speed might need a slight cut to the source clip so that it totals a clean multiple of the final number of frames you want to play back for the speeded up version.

Otherwise the software is going to have to do some frame-blending here and there which is where the hiccups will occur.

Mat Thompson · October 12th, 2009, 01:18 PM

Hi guys

Yeah I did wonder about making it a 'safe' increase in the amount speeded up. But you'd think the software would be intelligent enough to regulate this! - Its not a frame blending issue.

Has anyone else had this sort of issue before ? - This one has been particularly bad but I've had it more mildly before.

Its 25p 720 footage - mpeg1 - jvc gy hd110

Mat

Bob Hart · October 12th, 2009, 08:56 PM

QUOTE:

"But you'd think the software would be intelligent enough to regulate this!"

Western societies are freedom loving people. Just imagine if the software writers put up tiles which declared - "you cannot do this - return to GO" or "you will obey - return to GO and do what the manual tells you".

It would be a little more honest if they did. There would not be rioting consumers and blood on the streets but the software might not sell so well anymore.

Marketing of a product is based on declaring what it can do, not what it can't. I don't envy them as they try to navigate that fine ethical line, assuming they bother.

Maybe that is why some people ramp the framerate when applying a speed-up effect. Would that tend to cover fractional cadence artifacts?

Hopefully somebody who knows will tell soon. Please do not ascribe my comments as having any qualification. I am short sighted, partly colourblind and failed maths from grade 5 onwards, so in this instance I am particularly unqualified.

October 8th, 2009, 12:18 PM	#1
Mat Thompson Trustee Join Date: Sep 2006 Location: Kent UK Posts: 1,397	Jumping on speeded up panning shots ? Hi guys Just a quick question. I have a few panning shots (wide establishers). They are a touch slow for the edit so I've speeded up to 115%! I have horrible jumping in the resulting output! - I have noticed this before but to lesser levels. Can anyone suggest anything ? Many thanks Mat

October 12th, 2009, 08:56 PM	#6
Bob Hart Inner Circle Join Date: Dec 2003 Location: PERTH. W.A. AUSTRALIA. Posts: 4,476	QUOTE: "But you'd think the software would be intelligent enough to regulate this!" Western societies are freedom loving people. Just imagine if the software writers put up tiles which declared - "you cannot do this - return to GO" or "you will obey - return to GO and do what the manual tells you". It would be a little more honest if they did. There would not be rioting consumers and blood on the streets but the software might not sell so well anymore. Marketing of a product is based on declaring what it can do, not what it can't. I don't envy them as they try to navigate that fine ethical line, assuming they bother. Maybe that is why some people ramp the framerate when applying a speed-up effect. Would that tend to cover fractional cadence artifacts? Hopefully somebody who knows will tell soon. Please do not ascribe my comments as having any qualification. I am short sighted, partly colourblind and failed maths from grade 5 onwards, so in this instance I am particularly unqualified. Last edited by Bob Hart; October 12th, 2009 at 09:02 PM. Reason: error

October 8th, 2009, 01:06 PM	#2
Marty Baggen Major Player Join Date: May 2005 Location: monroe, or Posts: 572	Mat... you may find a solution with the Field Options (right-click your clip) for the target clip. If I remember right, I have achieved smooth motion with varied speeds by "interlacing consecutive frames".

October 8th, 2009, 07:34 PM	#3
Tripp Woelfel Trustee Join Date: Jan 2008 Location: North Conway, NH Posts: 1,745	Also try turning Frame Blending off (right click clip and de-select)and render a preview to see if it works better.

October 9th, 2009, 12:07 AM	#4
Bob Hart Inner Circle Join Date: Dec 2003 Location: PERTH. W.A. AUSTRALIA. Posts: 4,476	Your faster playback speed might need a slight cut to the source clip so that it totals a clean multiple of the final number of frames you want to play back for the speeded up version. Otherwise the software is going to have to do some frame-blending here and there which is where the hiccups will occur.

October 12th, 2009, 01:18 PM	#5
Mat Thompson Trustee Join Date: Sep 2006 Location: Kent UK Posts: 1,397	Hi guys Yeah I did wonder about making it a 'safe' increase in the amount speeded up. But you'd think the software would be intelligent enough to regulate this! - Its not a frame blending issue. Has anyone else had this sort of issue before ? - This one has been particularly bad but I've had it more mildly before. Its 25p 720 footage - mpeg1 - jvc gy hd110 Mat