Slow motion flickering: example

[macgregor]

Sometimes i find that images that have been correctly slowered at 50% show flickering in the intentsity of light (not a problem of fields).

I guess it has something to do with mpeg compression. But i would much appreciate if someone could answer this properly.

I am working right now with this project:

http://personales.ya.com/autodrome/pieza.mov

Here you will see 2 slow motion images (yes, it is not a photograph, it is actual video at 50% speed of an standing girl). The first one looks ok. The second one shows a flickering image (it is not a problem of quicktime compression, it is on the m2t file).

 

[fpinho]

Hi,
can you tell me what camera and editor you use to do this?

 

[macgregor]

hello.
Obviously a sony fx1 and vegas video.
I think in the web version the flickering don´t show too much, but it does on a better resolution video or in the TV. It has to be something with color.

 

[myfriendimage]

yeah i dont see anything, do you use frame blending for your slow mo?

 

[macgregor]

No. Interpolation of each field. Watch the left side of the image. The shoulder and the hair.