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flickering jpg’s
I have a project where I run a video on a time line and individual pics are running on the track above the video, using pan and crop so that each picture, at about one-fourth its original size, comes in to the screen from the top and “floats” from the top of the screen to the bottom, and going off screen at that point. My problem is flutter and flicker on some of the pics. Really bad flicker and flutter. But not on all of them, so look just fine. Some of the pics are of people tubing down a river and the water is flickering, or the grass flickers really bad. I have tried using Switches / reduce interlace flicker, as I read somewhere that would take it out, and Force Resampling, but neither seem to help. When the pictures are on a time line by themselves at normal size, there is no flicker, they do just fine. Any ideas would be greatly appreciated. Thanks.
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5 Replies
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Try using Track Motion to make the pictures small instead of Pan/Crop. If that doesn’t take enough of the flicker out try adding a Gaussian Blur about 0.002 on just those events that flicker. The flicker is caused by tiny details in the photo being too small to be represented in both fields of the interlaced video. You also might try rendering progressive (24p). I do all of my photo montages in 24p.
Also if you are resizing images you must set your render quality to BEST! This is really important.
~jr
http://www.johnrofrano.com
http://www.vasst.com -
Thanks for the great ideas. I tried using trak motion to size down one of the pictures and make it go from off screen on the top, flotating down the screen to off screen on the bottom as I had with pan/crop. The flicker is still there but I haven’t tried rendering progressive 24p(?). Before I go through the rendering process, I have well over 150 pictures and with pan/crop once I got the motion of the picture the way I wanted, all I had to do was select all the pictures, copy and paste attributes from the first one, and all the others had the same motion. I tried that with trak motion and that doesn’t seem to work. Is there another way without having to set each key frame for 150 pictures? Thanks.
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You can cut and paste Track Motion keyframes too but they most be done several at a time to build them up to 150. If using Track Motion did not reduce the flicker, I would simply keep the Pan/Crop. The next thing is to render as BEST quality.
~jr
http://www.johnrofrano.com
http://www.vasst.com -
Thanks John. I will render as best and if nothing else remove the pictures that flicker with others that do not. Appreciate your help. Have a great week!
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If these are stills shot with a digital camera, odds are that they’re pretty big is size (i.e. # of pixels) and shrinking them down like you’re doing has a tendency to do exactly what you’re experiencing.
Since they’re only going to be 1/4 screen size, use an app like IrfanView to batch reduce all of them down to match your project resolution.
I’m positive that your flickering will go away when you do this.
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