def speedUpAudio(self, event):
self.rate=self.rate*1.25
vlc.libvlc_media_player_set_rate(self.p, self.rate)
def piProcess(state,
lock,
rate_q,
change_q,
first_path,
second_path,
third_path,
timings,
threshold=3.2,
timer=300000,
s_rate=0.69):
"""Provide work with media on Raspberry Pi
:param state: current system state
:param lock: lock for global variables
:param rate_q: queue with video rate value
:param change_q: queue with video change flag
:param first_path: path to the first video
:param second_path: path to the second video
:param third_path: path to the image
:param timings: list of timings with white screen in video in ms
:param threshold: threshold value of video rate (the default is 3.2)
:param timer: time value for looping value in ms (the default is 300000)
:param s_rate: start video rate value (the default is 0.69)
"""
state_list = [1, 2, 3, 4, 5, 8]
rate = s_rate
last_timing = 0
# First video init by using VLC player
Instance = vlc.Instance('--no-xlib')
player = Instance.media_player_new()
Media = Instance.media_new_path(first_path)
player.set_media(Media)
vlc.libvlc_media_player_set_rate(player, rate)
player.set_fullscreen(True)
# Images init
image = cv2.imread(third_path)
eye1 = cv2.imread('/home/pi/Desktop/Quest_final/eye.jpg')
eye2 = cv2.imread('/home/pi/Desktop/Quest_final/eye1.jpg')
winname = 'Quest'
cv2.namedWindow(winname, cv2.WND_PROP_FULLSCREEN)
cv2.setWindowProperty(winname, cv2.WND_PROP_FULLSCREEN,
cv2.WINDOW_FULLSCREEN)
while True:
if state.value in state_list:
if state.value == 1:
# Black screen
cv2.imshow(winname, image)
cv2.waitKey(25)
elif state.value == 2:
# Start showing main video
vlc.libvlc_media_player_set_rate(player, rate)
player.play()
elif state.value == 3:
if not (rate_q.empty()):
# Change video rate value
rate = rate_q.get()
vlc.libvlc_media_player_set_rate(player, rate)
if rate >= threshold:
# Quest end
lock.acquire()
state.value = 4
lock.release()
continue
if not (change_q.empty()):
# Show sub video
if change_q.get():
cv2.imshow(winname, eye1)
cv2.waitKey(25)
player.stop()
changeVideo(second_path, winname, eye2)
player.play()
# Video loop
cur_timing = vlc.libvlc_media_player_get_time(player)
if cur_timing >= timer:
vlc.libvlc_media_player_set_time(player, 1000)
elif state.value == 4:
# Play the video to the end
vlc.libvlc_media_player_set_rate(player, 3.5)
vlc.libvlc_media_player_set_time(player, timer)
elif state.value == 5:
# Go to the last frame
pass
elif state.value == 8:
cv2.imshow(winname, image)
cv2.waitKey(25)
player.stop()
rate = s_rate
def slowDownAudio(self, event):
self.rate=self.rate*0.75
vlc.libvlc_media_player_set_rate(self.p, self.rate)
