Cropping videos at DVinfo.net

Chris Yi · November 11th, 2003, 04:46 AM

When exporting videos for the internet, I want to crop them so that the image is more consistent to what a viewer would see on a TV. Would it be better for me to crop the video in Premiere Pro (I would also have to hit the "zoom" box so the video would fill in the black spaces). Or would the quality be better if the video was cropped in the compression program? (such as Cleaner or Squeeze). I thought that pixels might be stretched out when cropped in Premier Pro. Any thoughts?

David Hurdon · November 11th, 2003, 06:33 AM

If you're trying to preserve for the web what is left of your piece after a TV overscans it you might start by laying an action safe grid over any part of it, then use the clip filter to bring your edges in to the action safe point. Once you know what % that is for each edge you can process a complete AVI to those settings and subsequent compression will not be slowed by having to make cropping decisions - but of course you'll have to render the effect so time burns somewhere no matter how you do it. Overscan varies from TV to TV. I recently saw my titles partially obscured on an old 32" unit, and they were in the title safe area.

David Hurdon

Chris Yi · November 12th, 2003, 03:09 AM

Is there a difference between cropping in your NLE or cropping in your compressor? I use two separate programs, and what I do is export my movie from the NLE, then compress it using the compressor. Each one offers the option to crop the movie. However, would the quality be better by compressing in one or the other?

David Hurdon · November 12th, 2003, 05:25 AM

I'm no expert, Chris, but it's my understanding that it's easier for the compressor to manage an input with the black edges already there, as the consistency of their appearance makes "decisions" about how to compress each frame simpler. It can concentrate its bit budget on what does change.

David Hurdon

Chris Yi · November 12th, 2003, 09:10 PM

Alright, I'll keep cropping with the compressor then. Thanks David.

November 11th, 2003, 04:46 AM	#1
Chris Yi Regular Crew Join Date: Jul 2003 Location: Walnut Creek (USA) Posts: 32	Cropping videos When exporting videos for the internet, I want to crop them so that the image is more consistent to what a viewer would see on a TV. Would it be better for me to crop the video in Premiere Pro (I would also have to hit the "zoom" box so the video would fill in the black spaces). Or would the quality be better if the video was cropped in the compression program? (such as Cleaner or Squeeze). I thought that pixels might be stretched out when cropped in Premier Pro. Any thoughts?

November 11th, 2003, 06:33 AM	#2
David Hurdon Major Player Join Date: Nov 2002 Location: Toronto, Canada Posts: 484	If you're trying to preserve for the web what is left of your piece after a TV overscans it you might start by laying an action safe grid over any part of it, then use the clip filter to bring your edges in to the action safe point. Once you know what % that is for each edge you can process a complete AVI to those settings and subsequent compression will not be slowed by having to make cropping decisions - but of course you'll have to render the effect so time burns somewhere no matter how you do it. Overscan varies from TV to TV. I recently saw my titles partially obscured on an old 32" unit, and they were in the title safe area. David Hurdon __________________ Site:http://www.faceliftmarketing.ca Blog:http://www.websitevideo.blogspot.com

November 12th, 2003, 05:25 AM	#4
David Hurdon Major Player Join Date: Nov 2002 Location: Toronto, Canada Posts: 484	I'm no expert, Chris, but it's my understanding that it's easier for the compressor to manage an input with the black edges already there, as the consistency of their appearance makes "decisions" about how to compress each frame simpler. It can concentrate its bit budget on what does change. David Hurdon __________________ Site:http://www.faceliftmarketing.ca Blog:http://www.websitevideo.blogspot.com

November 12th, 2003, 03:09 AM	#3
Chris Yi Regular Crew Join Date: Jul 2003 Location: Walnut Creek (USA) Posts: 32	Is there a difference between cropping in your NLE or cropping in your compressor? I use two separate programs, and what I do is export my movie from the NLE, then compress it using the compressor. Each one offers the option to crop the movie. However, would the quality be better by compressing in one or the other?

November 12th, 2003, 09:10 PM	#5
Chris Yi Regular Crew Join Date: Jul 2003 Location: Walnut Creek (USA) Posts: 32	Alright, I'll keep cropping with the compressor then. Thanks David.