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Flickering lines
I have just had a problem and found a workaround, but wanted to know if anyone else has experienced this, and what they did to fix it. I am running CS3 and created a project full of pictures and text, lots of movement but no video. I set up the pictures and put in the movement entirely in after effects rendered out each section and put them in a Premiere time line. So far so good, my next step was to add lines around the pictures and words, I wanted them to have movement so that is why I didn’t just put strokes around each pic. Once I get the effect I want I then render the whole thing to find that my words are looking like they are breathing or pulsing. I can’t fix the problem with simple defielding, antialiasing, and deflickering. So then I just render out the lines with an alpha channel with the plan to lay it over the video with the non breathing words. The lines then start to flicker. I made sure that the settings were continously rasterize and I rendered it uncompressed, when I did a 30 sec (out of 2 min project) everything worked perfectly. So I render out the whole timeline and the flicker reappeared. I ended up just rendering out 30 sec sections of just the lines because that was the only thing that seemed to work.
Sorry for the wall of text but it was very frustrating and I was wondering if anyone else has had experiences like this.
Thanks,
Jeremy -
4 Replies
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A couple of thngs to check. Check that your white don’t exceed NTSC standard. ooking at the waveform monitor should tell you that part.
You should also apply motion blur in AE, expecially in lower frame rates like 24P.
Vince Becquiot
Director | EditorKaptis Studios
San Francisco – Bay Area -
Flickering usually occurs when a line of information falls into 1 or 1 and a bit pixel line horizontally. When the video is interlaced the field that holds the line shows it then the next field doesn’t show it because it doesn’t fall inside the field so you get a quick succession of there not there = flickering.
One trick is to add 0.5 or 1 point of fast blur. which doesn’t make it blurry but is makes the edges fall over two fields removing the off part of the display.
Another thing is to work in progressive. AE handles progressive great. Premiere’s handle of it needs to be setup as a custom sequence with the fields set to none (Progressive).
– Jon BarrieJon Barrie
aJBprods
http://www.jonbarrie.net -
There is an anti-flicker effect you can use.
I’ve also found this problem with small thin fonts.
Enlarging the font helps. -
As a basic rule of thumb, don’t use thin fonts, serifed fonts and thin lines.
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