ZeroDivisionError: float division by zero when i try show video durations in directory
ZeroDivisionError: float division by zero when i try show video durations in directory
思路：获取目录下所有视频的时长。
问题：我想输出目录中所有视频的持续时间，但出现错误，这是我的代码：
这是原始代码https://pastebin.com/xnpfwE55
from colorama import init
from colorama import Fore
import datetime
import glob
import cv2
init()
w = input(str(Fore.GREEN+"Type path to dir: ")) # path of directory
b = print(str(glob.glob(w+"*"))) # Adds a directory and reads files from there
print(b)
# create video capture object
data = cv2.VideoCapture(str(b))
# count the number of frames
frames = data.get(cv2.CAP_PROP_FRAME_COUNT)
fps = int(data.get(cv2.CAP_PROP_FPS))
# calculate dusration of the video
seconds = int(frames / fps)
video_time = str(datetime.timedelta(seconds=seconds))
print("duration in seconds:", seconds)
print("video time:", video_time)
我该怎么办？
输出：
[gooder@GOD ffmpeg]$ python untitled2.py
Type path to dir: /home/gooder/Desktop/ffmpeg/videos/
['/home/gooder/Desktop/ffmpeg/videos/ou1t.mp4', '/home/gooder/Desktop/ffmpeg/videos/out.mp4', '/home/gooder/Desktop/ffmpeg/videos/Halloween.Kills.2021.DUB.HDRip.x264.mkv']
None
[ WARN:0@1.851] global /build/opencv/src/opencv-4.5.5/modules/videoio/src/cap_gstreamer.cpp (1127) open OpenCV | GStreamer warning: Error opening bin: no element "None"
[ WARN:0@1.851] global /build/opencv/src/opencv-4.5.5/modules/videoio/src/cap_gstreamer.cpp (862) isPipelinePlaying OpenCV | GStreamer warning: GStreamer: pipeline have not been created
[ERROR:0@2.770] global /build/opencv/src/opencv-4.5.5/modules/videoio/src/cap.cpp (164) open VIDEOIO(CV_IMAGES): raised OpenCV exception:
OpenCV(4.5.5) /build/opencv/src/opencv-4.5.5/modules/videoio/src/cap_images.cpp:253: error: (-5:Bad argument) CAP_IMAGES: can't find starting number (in the name of file): None in function 'icvExtractPattern'
Traceback (most recent call last):
File "/home/gooder/Desktop/ffmpeg/untitled2.py", line 19, in <module>
seconds = int(frames / fps)
ZeroDivisionError: float division by zero
这一行似乎有一些混乱的代码：
b = print(str(glob.glob(w+"*"))) # Adds a directory and reads files from there
您将在变量 w 中输入的目录的内容全局化，将该列表转换为字符串，print 将该字符串输出到标准输出，然后将 None 分配给 b，因为 print 将其参数写入标准输出（或其他一些流）并且不 return 任何东西。
已经在评论中指出，以这种方式调用print不会做你想做的。因此，第一步是摆脱它：
b = str(glob.glob(w+"*")) # Adds a directory and reads files from there
print(b)
但这还不够，因为 b 不是文件名，而是将文件名列表转换为字符串的结果。尝试打开名称为 b 的文件仍然会失败。
glob.glob return 是一个列表，列表中的每一项都是与给定模式匹配的文件。您需要遍历此列表，然后 运行 对列表中的每个项目执行一次其余代码：
for b in glob.glob(w+"*"): # Adds a directory and reads files from there
print(b)
# create video capture object
data = cv2.VideoCapture(b)
# remaining lines also indented, but omitted here for brevity
每次循环，b 应该是您输入的目录中的文件之一的名称。
最后，如果 cv2 由于某种原因无法读取视频文件的 FPS，我建议不要尝试计算视频的持续时间。将循环底部的代码替换为如下内容：
if fps == 0:
print("Could not read an FPS value, unable to calculate duration of video")
else:
# calculate duration as normal...
思路：获取目录下所有视频的时长。
问题：我想输出目录中所有视频的持续时间，但出现错误，这是我的代码：
这是原始代码https://pastebin.com/xnpfwE55
from colorama import init
from colorama import Fore
import datetime
import glob
import cv2
init()
w = input(str(Fore.GREEN+"Type path to dir: ")) # path of directory
b = print(str(glob.glob(w+"*"))) # Adds a directory and reads files from there
print(b)
# create video capture object
data = cv2.VideoCapture(str(b))
# count the number of frames
frames = data.get(cv2.CAP_PROP_FRAME_COUNT)
fps = int(data.get(cv2.CAP_PROP_FPS))
# calculate dusration of the video
seconds = int(frames / fps)
video_time = str(datetime.timedelta(seconds=seconds))
print("duration in seconds:", seconds)
print("video time:", video_time)
我该怎么办？
输出：
[gooder@GOD ffmpeg]$ python untitled2.py
Type path to dir: /home/gooder/Desktop/ffmpeg/videos/
['/home/gooder/Desktop/ffmpeg/videos/ou1t.mp4', '/home/gooder/Desktop/ffmpeg/videos/out.mp4', '/home/gooder/Desktop/ffmpeg/videos/Halloween.Kills.2021.DUB.HDRip.x264.mkv']
None
[ WARN:0@1.851] global /build/opencv/src/opencv-4.5.5/modules/videoio/src/cap_gstreamer.cpp (1127) open OpenCV | GStreamer warning: Error opening bin: no element "None"
[ WARN:0@1.851] global /build/opencv/src/opencv-4.5.5/modules/videoio/src/cap_gstreamer.cpp (862) isPipelinePlaying OpenCV | GStreamer warning: GStreamer: pipeline have not been created
[ERROR:0@2.770] global /build/opencv/src/opencv-4.5.5/modules/videoio/src/cap.cpp (164) open VIDEOIO(CV_IMAGES): raised OpenCV exception:
OpenCV(4.5.5) /build/opencv/src/opencv-4.5.5/modules/videoio/src/cap_images.cpp:253: error: (-5:Bad argument) CAP_IMAGES: can't find starting number (in the name of file): None in function 'icvExtractPattern'
Traceback (most recent call last):
File "/home/gooder/Desktop/ffmpeg/untitled2.py", line 19, in <module>
seconds = int(frames / fps)
ZeroDivisionError: float division by zero
这一行似乎有一些混乱的代码：
b = print(str(glob.glob(w+"*"))) # Adds a directory and reads files from there
您将在变量 w 中输入的目录的内容全局化，将该列表转换为字符串，print 将该字符串输出到标准输出，然后将 None 分配给 b，因为 print 将其参数写入标准输出（或其他一些流）并且不 return 任何东西。
已经在评论中指出，以这种方式调用print不会做你想做的。因此，第一步是摆脱它：
b = str(glob.glob(w+"*")) # Adds a directory and reads files from there
print(b)
但这还不够，因为 b 不是文件名，而是将文件名列表转换为字符串的结果。尝试打开名称为 b 的文件仍然会失败。
glob.glob return 是一个列表，列表中的每一项都是与给定模式匹配的文件。您需要遍历此列表，然后 运行 对列表中的每个项目执行一次其余代码：
for b in glob.glob(w+"*"): # Adds a directory and reads files from there
print(b)
# create video capture object
data = cv2.VideoCapture(b)
# remaining lines also indented, but omitted here for brevity
每次循环，b 应该是您输入的目录中的文件之一的名称。
最后，如果 cv2 由于某种原因无法读取视频文件的 FPS，我建议不要尝试计算视频的持续时间。将循环底部的代码替换为如下内容：
if fps == 0:
print("Could not read an FPS value, unable to calculate duration of video")
else:
# calculate duration as normal...