AttributeError: 'NoneType' object has no attribute 'all' - Printable Version +- Python Forum (https://python-forum.io) +-- Forum: Python Coding (https://python-forum.io/forum-7.html) +--- Forum: Data Science (https://python-forum.io/forum-44.html) +--- Thread: AttributeError: 'NoneType' object has no attribute 'all' (/thread-16601.html) |
AttributeError: 'NoneType' object has no attribute 'all' - synthex - Mar-06-2019 I want convert video files to binary code and load result into csv I use Ubuntu mport csv import numpy as np import cv2 import os def video_to_csv(name, num_frames): cap = cv2.VideoCapture(name) i = 0 NUMFRAMES = num_frames name = os.path.splitext(name)[0] while(True): if i >= NUMFRAMES: break ret, frame = cap.read() if frame.all(): break with open(name + str(i) + '.csv', 'w', newline='') as csvfile: writer = csv.writer(csvfile, delimiter=',') writer.writerows(frame.tolist()) i += 1 def video_from_csv(name, num_frames): i = 0 NUMFRAMES = num_frames name = os.path.splitext(name)[0] while i < NUMFRAMES: with open(name + str(i) + '.csv', 'r') as f: reader = csv.reader(f) frame_data = list(reader) frame_list = [] for row in frame_data: nrow = [] for r in row: nrow.append(eval(r)) frame_list.append(nrow) img = np.array(frame_list) cv2.imwrite(name + str(i) + '.jpg', img) i += 1 for root, dirs, files in os.walk("."): for file in files: if file.endswith(".mp4"): video_to_csv(file, 2)in Ubuntu terminal python Downloads/video/f.py AttributeError: 'NoneType' object has no attribute 'all'i have some videos in folder, but to reproduce example here one of them video Tom&jerry.mp4 How to fix my code? RE: AttributeError: 'NoneType' object has no attribute 'all' - Yoriz - Mar-06-2019 Looking at the documentation cap.read() returns a Boolean to show if a frame has been read correctly and a frame. perhaps you should check ret first to see if a frame has been read correctly. I'm guessing it will return None if it has not read a frame correctly or there is no frame. RE: AttributeError: 'NoneType' object has no attribute 'all' - synthex - Mar-07-2019 How do I fix it so that it read the frame correctly? |