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remove pulldown with phase changes throughout
Hello,
my understanding is that if pulldown has been added from film, then when it is edited after telecine, the pulldown phase will be changed throughout the clip. If I am trying to remove pulldown, then is the only way to do this by chopping up the clip and removing different pulldown phase from each individual shot of the whole clip?
I am doing this because we are trying to get spot with pulldown added to look good on progressive monitors and not show any interlacing resulting from pulldown.
thanks for the help,
dan -
10 Replies
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thanks for the reply Dave,
If I am encountering dissolves and fades, what’s the best point to make a cut?
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You have my attention. Although i’m still trying to figure out exactly what being hosed means….
I am indeed in a crappy predicament. I have a library of spots that my marketing department wants to look good on tvs and on progressive monitors. The whole library is at 29.97, with most of those existing on digibeta 10 bit uncompressed also at 29.97. The library is a few thousand spots from a huge variety of formats, many of those originally film. Anything with pulldown added, from my understanding, looks bad on progressive monitors, and that is the riddle in which the hosing is occuring.
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Some definitions of “hosed” are here.
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As Mr. LaRonde said, if you have any edits other than cuts, then you are mostly hosed.
However, you can remove pulldown with different phases in the same clip, if the phase changes are just because of cuts, without having to cut into a bunch of segments first. Our FieldsKit product has a pulldown removal plugin that will allow you to animate the phase setting. You’ll have to do animate the phase changes manually, but you can go to each cut and change the phase. In this way you can removal pulldown that changes phase across cuts (but not dissolves, wipes,etc, that could have two different phases represented in the same frame).
FieldsKit only removes 3:2 pulldown and 3:2 Advanced pulldown (we don’t other phases currently). more info here: https://www.revisionfx.com/products/fieldskit
Pete Litwinowicz
RE:Vision Effects, Inc. -
They look perfect on video monitors, anything that plays back interlaced footage. But on computer screens, anything w/ pulldown added looks bad. You see the split frames.
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These spots are for director’s reels. The marketing people think that when we send DVDs to prospective clients, that they may watch them through DVDs to television sets, or moreover on Laptops. So this process is attempting to optimize playback through both. It may be a lost cause but this was a final shot i guess.
thanks again,
dan -
The upshot of it all seems to be:
1. removing pulldown over cuts is possible, but painstaking work, cut-by-cut.
2. removing pulldown over a dissolve with matching pulldown phases is possible (odds are 4:1 against?), but the same as above.
3. removing pulldown over a dissolve with mismatched pulldown phases is impossible.The client might have thought it was “push the button and render” situation, but it isn’t.
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I would say that the only way to remove mismatched pulldown through a dissolve is to deinterlace the footage, but that would decrease the overall image quality.
If you take one of the spots and test out making it progressive, keep track of your time. This will give you info to let your client know how much time/money it will take to complete the entire library of spots. This may assist them in calculating the validity of this project.
Scott Skaja
edit/design/animation
http://www.scottskaja.com -
I just did a video to web commercial spot with pull down phrases all over the place. Instead of manually chopping it up all the edits. I imported the spot 5 times and each one use a different phrase and stack all of them into one composition. I just switch on and off splited layers to use the footage that was correctly removed the 3:2.
I don’t have the plugin that can keyframe the phrases to remove 3:2 pull down.
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