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import cv2
import numpy as np
import random
import time
print 'Press q to quit while the video is playing'
rec = raw_input('Record to video [y/n]? ').lower()[0] == 'y'
single = ['np.cos', 'np.sin', 'np.tan'] #Operations on a single number
binary = ['*', '+', '-'] #Operations for 2 numbers
numlist = ['frame', 't', 'Constant']
def randFunction(functionLength, singleweight, numberweight):
hasframe = False
hast = False
while not(hasframe and hast):
#Types: b for binary, s for single, f for first, n for number
function = ''
lasttype = 'f'
thistype = 0
hasframe = False
hast = False
chanceend = 0
length = 1 #Number of operations done so far
while True:
chanceend = (1.0 - (1.0 / length)) ** (float(functionLength)/7)
if lasttype == 'n':
number = random.random()
if number < chanceend:
break
function = '(' + function + ')' + random.choice(binary)
lasttype = 'b'
elif lasttype == 's' or lasttype == 'b' or lasttype == 'f':
function += '('
thistype = random.random()
if thistype < singleweight / (singleweight + numberweight):
function += random.choice(single)
lasttype = 's'
else:
what = random.choice(numlist)
if what == 'Constant':
function += str(random.gauss(150, 50))
else:
function += what
if what == 'frame':
hasframe = True
elif what == 't':
hast = True
lasttype = 'n'
function += ')'
length += 1
if function.count('(') > function.count(')'):
function += ')' * (function.count('(') - function.count(')'))
return function
start = time.time()
t = 0
cap = cv2.VideoCapture(0)
function = randFunction(80, 1, 1)
try:
w = cap.get(cv2.CV_CAP_PROP_FRAME_WIDTH)
h = cap.get(cv2.CV_CAP_PROP_FRAME_HEIGHT)
except:
w = cap.get(cv2.cv.CV_CAP_PROP_FRAME_WIDTH)
h = cap.get(cv2.cv.CV_CAP_PROP_FRAME_HEIGHT)
if rec:
try:
fourcc = cv2.cv.CV_FOURCC(*'XVID')
except:
fourcc = cv2.VideoWriter_fourcc(*'XVID')
out = cv2.VideoWriter(' '.join([namemaker3.generate() for i in range(3)]) + '.avi', fourcc, 10, (int(w),int(h)))
while True:
t += 0.1
ret, frame = cap.read()
frame = frame.astype(float)
frame = eval(function).astype(np.uint8)
if rec:
out.write(frame)
cv2.imshow('Video',frame)
if cv2.waitKey(1) & 0xFF == ord('q'):
break
cap.release()
if rec:
out.release()
cv2.destroyAllWindows()
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