WHEN in the course of human Events, it becomes necessary….
Floating on the Frame Rate
byVanderleunonJuly 19, 2017
When reviewing the security footage from outside his house in Austin, Texas, Al Brooks spotted an unusual sight: a bird seems to hover past the camera with its wings completely stationary. Of course it wasn’t really hovering (and no, it’s not suspended by strings) but rather the frame rate of the camera matched the flaps of the bird’s wings perfectly resulting in a stroboscopic illusion. This is the same stroboscopic effect you might see in a video of airplane propellers that aren’t moving or when the wheels on a car appear to be frozen.
I would think that either the frame rate and wing flap was the same (1:1 ratio), or a perfectly divided ratio, 2:1, 3:1, or 1:3, 1:2, etc. That would create the same effect. Pretty cool regardless.
Anybody remember old cowboy movies where the stage coaches were being chased by bad guys and the wheels appeared to be rotating backward? I was just a kid when my Dad tried to explain the sample rate to me, but it did not jell until electronics school.
Phil in EnglewoodJuly 19, 2017, 3:45 PM
This video demonstrating/explaining rolling shutter is pretty good, too. The odd video of airplane propellers starting about 2:00 is particularly interesting.
This old anvil laughs at many broken hammers.
There are men who can’t be bought.
The fireborn are at home in fire.
The stars make no noise.
You can’t hinder the wind from blowing.
Time is a great teacher.
Who can live without hope?
In the darkness with a great bundle of grief
the people march.
In the night, and overhead a shovel of stars for
keeps, the people march:
“Where to? what next?”
— Carl Sandburg
Stone-cutters fighting time with marble, you foredefeated
Challengers of oblivion
Eat cynical earnings, knowing rock splits, records fall down,
The square-limbed Roman letters
Scale in the thaws, wear in the rain. The poet as well
Builds his monument mockingly;
For man will be blotted out, the blithe earth die, the brave sun
Die blind and blacken to the heart:
Yet stones have stood for a thousand years, and pained
thoughts found
The honey of peace in old poems.
— Robinson Jeffers
ARTIST: CASEY KLAHN
Search American Digest’s Back Pages
from Preludes
His soul stretched tight across the skies
That fade behind a city block,
Or trampled by insistent feet
At four and five and six o’clock;
And short square fingers stuffing pipes,
And evening newspapers, and eyes
Assured of certain certainties,
The conscience of a blackened street
Impatient to assume the world.
I am moved by fancies that are curled
Around these images, and cling:
The notion of some infinitely gentle
Infinitely suffering thing.
Wipe your hand across your mouth, and laugh;
The worlds revolve like ancient women
Gathering fuel in vacant lots.
— Eliot
Ferreya
Song of Myself
I CELEBRATE myself, and sing myself,
And what I assume you shall assume,
For every atom belonging to me as good belongs to you.
I loafe and invite my soul,
I lean and loafe at my ease observing a spear of summer grass.
My tongue, every atom of my blood, form’d from this soil, this
air,
Born here of parents born here from parents the same, and their
parents the same,
I, now thirty-seven years old in perfect health begin,
Hoping to cease not till death.
— Walt Whitman
from Canto CXV BY EZRA POUND
The scientists are in terror
and the European mind stops
Wyndham Lewis chose blindness
rather than have his mind stop.
Night under wind mid garofani,
the petals are almost still
Mozart, Linnaeus, Sulmona,
When one’s friends hate each other
how can there be peace in the world?
Their asperities diverted me in my green time.
A blown husk that is finished
but the light sings eternal
a pale flare over marshes
where the salt hay whispers to tide’s change
Time, space,
neither life nor death is the answer.
And of man seeking good,
doing evil.
In meiner Heimat
where the dead walked
and the living were made of cardboard.
“From a student radical/hippie/leftist of the Free Speech Movement/Vietnam Day Commitee era and a full-on Democratic Liberal in the decades after, I think I’ve evolved a politics that is neither right nor left but is, in its elemental nature, draconian. In the last 20 years, I’ve taken apart my beliefs with a sledgehammer. Now I’ve got to put the surviving parts back together with tweezers and other ‘shabby equipment, always deteriorating’.”
Hillegas
Real World Address for Donations, Mash Notes and Hate Mail
Gerard Van der Leun
1692 MANGROVE AVE
APT 379
Chico, Ca 95926
When reviewing the security footage from outside his house in Austin, Texas, Al Brooks spotted an unusual sight: a bird seems to hover past the camera with its wings completely stationary. Of course it wasn’t really hovering (and no, it’s not suspended by strings) but rather the frame rate of the camera matched the flaps of the bird’s wings perfectly resulting in a stroboscopic illusion. This is the same stroboscopic effect you might see in a video of airplane propellers that aren’t moving or when the wheels on a car appear to be frozen.
![That Was the Whopper Weekend That Was [Illustrated]](https://americandigest.org/wp/wp-content/uploads/2021/05/welcometohell-150x150.jpg "That Was the Whopper Weekend That Was [Illustrated]")
Gerard Van der Leun
Stone-cutters fighting time with marble, you foredefeated
The scientists are in terror
Comments on this entry are closed.
I would think that either the frame rate and wing flap was the same (1:1 ratio), or a perfectly divided ratio, 2:1, 3:1, or 1:3, 1:2, etc. That would create the same effect. Pretty cool regardless.
Anybody remember old cowboy movies where the stage coaches were being chased by bad guys and the wheels appeared to be rotating backward? I was just a kid when my Dad tried to explain the sample rate to me, but it did not jell until electronics school.
This video demonstrating/explaining rolling shutter is pretty good, too. The odd video of airplane propellers starting about 2:00 is particularly interesting.
https://youtu.be/dNVtMmLlnoE