def __init__(self, file_name, directory=None):
# pick a subdirectory of logs
self.directory = project.parse_dir(directory, log_directory,
lambda x: datetime.strptime(x, log_folder_format))
# for external use. Get the picked local directory
self.local_dir = self.directory[self.directory.rfind("/", 0, -1) + 1:]
# parse the file name. Get the full directory of the file
self.file_name = project.get_file_name(
file_name, self.directory, log_file_type)
self.file_name_no_ext = self.file_name.split(".")[0]
print("Using file named '%s'" % self.file_name)
# read the whole file as a string
with open(self.directory + self.file_name, 'r') as data_file:
self.contents = data_file.read()
# try to parse the name as a timestamp. If it succeeds, see if the
# file is obsolete. Otherwise, do nothing
try:
if (datetime.strptime(self.directory.split("/")[-2], '%b %d %Y') <=
datetime.strptime(obsolete_data, '%b %d %Y')):
print("WARNING: You are using a data set that is obsolete "
"with the current parser. Continue? (y/n)", end="")
proceed = None
while proceed != "" and proceed != "y" and proceed != "n":
proceed = input(": ").lower()
if proceed == "n":
sys.exit(1)
except ValueError:
pass
self.data = [] # the parsed data of the file
self.iter_index = 0 # the character index of the file
pickle_file_name = self.file_name[:-len(log_file_type)] + pickle_file_type
log_pickle_dir = project.interpret_dir(pickle_directory) + self.local_dir
if os.path.isfile(log_pickle_dir + pickle_file_name):
print("Using pickled data")
time0 = time.time()
with open(log_pickle_dir + pickle_file_name, 'rb') as pickle_file:
self.data = pickle.load(pickle_file)
print("Took %s seconds" % (time.time() - time0))
else:
# parse the file and write it to a pickle file
print("Using raw file")
time0 = time.time()
self.create_data()
print("Took %s seconds" % (time.time() - time0))
if not os.path.isdir(log_pickle_dir):
os.mkdir(log_pickle_dir)
with open(log_pickle_dir + pickle_file_name, 'wb') as pickle_file:
pickle.dump(self.data, pickle_file, pickle.HIGHEST_PROTOCOL)
print("Wrote pickle to: " + log_pickle_dir + pickle_file_name)
def load_video(self, video_name, directory):
"""Load a video file from a directory into an opencv capture object"""
directory = project.parse_dir(directory, ":videos")
video_name = project.get_file_name(video_name, directory,
['avi', 'mov', 'mp4',
'AVI', 'MOV', 'MP4'])
print("loading video into window named '" + str(
video_name) + "'...")
capture = cv2.VideoCapture(directory + video_name)
cv2.namedWindow(video_name)
# set the properties of the video
fps = capture.get(cv2.CAP_PROP_FPS)
num_frames = int(capture.get(cv2.CAP_PROP_FRAME_COUNT))
if num_frames <= 0:
raise Exception("Video failed to load! "
"Did you misspell the video name?")
length_sec = num_frames / fps
length_msec = int(length_sec * 1000)
print("\tfps:", fps)
print("\tlength (sec):", length_sec)
print("\tlength (frames):", num_frames)
# initialize the track bar and the number of ticks it has
slider_ticks = int(capture.get(cv2.CAP_PROP_FRAME_WIDTH) / 3)
if slider_ticks > num_frames:
slider_ticks = num_frames
track_bar_name = "frame:"
cv2.createTrackbar(track_bar_name, video_name, 0, slider_ticks,
self.on_slider)
print("video loaded!")
return video_name, capture, length_msec, num_frames, slider_ticks, track_bar_name
