Strobe effect downconverting HDV slowmotion to SD? at DVinfo.net

Erik Palm · June 14th, 2007, 10:04 AM

I have used FCP and Canon A1 HDV 50i footage that I have captured and edited in HDV 1080i50, downconverted to 4:3 SD DV-PAL and produced Quicktimefiles. The result looked fine, looked a bit progressive, but the slowmotionparts looked like strobed and was not usable. Why is that and any idea for solution?

Thanks Erik

Mikko Lopponen · June 14th, 2007, 10:30 AM

Final cut pro does very bad slowmotions.

Patrick Moreau · June 15th, 2007, 09:26 PM

I tend to think FCP does slow motion very well. Often people think our slow mo was done with a third party plugin.

The new version of FCP solves the problem your talking about automatically.

To solve the problem now, I would downconvert using compressor, which worked very well for me. You can also try creating a new SD timeline in FCP, dropping your whole project in ther enad then applying a shift fields filter (as the field dominance is different in Hd than for Sd, which I belive is the causee of the strobing.)

I shot and edited this clip in Hd and donconverted to SD using compressor. There is some slow mo in there, some of it as slow as 35%, and I think it looks great.

http://stillmotionblog.com/?p=85

Patrick

Adam La Prade · June 17th, 2007, 10:54 AM

Patrick, that clip was amazing!

What 35mm adapter are you using and with what lenses? Also, what type of camera stabilizer are you using?

Patrick Moreau · June 17th, 2007, 03:24 PM

Hi Adam,

The clip was shot with a steadicam flyer and the 35mm adapter is the brevis. I have some even better footage that I shot with it over at their forum on cinevate.com

atrick

June 14th, 2007, 10:04 AM	#1
Erik Palm Regular Crew Join Date: Jan 2006 Location: Stockholm, Sweden Posts: 64	Strobe effect downconverting HDV slowmotion to SD? I have used FCP and Canon A1 HDV 50i footage that I have captured and edited in HDV 1080i50, downconverted to 4:3 SD DV-PAL and produced Quicktimefiles. The result looked fine, looked a bit progressive, but the slowmotionparts looked like strobed and was not usable. Why is that and any idea for solution? Thanks Erik

June 14th, 2007, 10:30 AM	#2
Mikko Lopponen Major Player Join Date: Mar 2006 Location: Helsinki, Finland Posts: 393	Final cut pro does very bad slowmotions.

June 15th, 2007, 09:26 PM	#3
Patrick Moreau Still Motion Join Date: Oct 2004 Location: Toronto, Canada Posts: 1,186	I tend to think FCP does slow motion very well. Often people think our slow mo was done with a third party plugin. The new version of FCP solves the problem your talking about automatically. To solve the problem now, I would downconvert using compressor, which worked very well for me. You can also try creating a new SD timeline in FCP, dropping your whole project in ther enad then applying a shift fields filter (as the field dominance is different in Hd than for Sd, which I belive is the causee of the strobing.) I shot and edited this clip in Hd and donconverted to SD using compressor. There is some slow mo in there, some of it as slow as 35%, and I think it looks great. http://stillmotionblog.com/?p=85 Patrick

June 17th, 2007, 10:54 AM	#4
Adam La Prade Regular Crew Join Date: Mar 2006 Location: Orlando, FL Posts: 77	Patrick, that clip was amazing! What 35mm adapter are you using and with what lenses? Also, what type of camera stabilizer are you using?

June 17th, 2007, 03:24 PM	#5
Patrick Moreau Still Motion Join Date: Oct 2004 Location: Toronto, Canada Posts: 1,186	Hi Adam, The clip was shot with a steadicam flyer and the 35mm adapter is the brevis. I have some even better footage that I shot with it over at their forum on cinevate.com atrick