python 视频捕获循环

发布于 2024-10-31 02:08:42 字数 390 浏览 5 评论 0原文

我编写了一个简单的脚本来连续从网络摄像头捕获快照。我唯一的问题是视频捕获模块并不总是捕获图像，这反过来又导致程序崩溃。我想我可以通过使用无限循环来解决这个问题，但我不确定如何解决。这是脚本：

from VideoCapture import Device
import datetime
def capt():
  a = datetime.datetime.now().strftime("%Y%m%dT%H%M%S%ms")

  b = str(a)
  cam = Device(devnum=0)
  cam.setResolution(1280, 960)

  cam.saveSnapshot('%s.png' % (b))

for i in range(1, 100000):
  capt()

原文

I've written a simple script to continuously capture snapshots from my webcam. My only issue is the videocapture module doesn't always grab an image which in turn crashes the program. I think I could solve this by using an infinite loop but I'm not real certain how to go about it. Here's the script:

from VideoCapture import Device
import datetime
def capt():
  a = datetime.datetime.now().strftime("%Y%m%dT%H%M%S%ms")

  b = str(a)
  cam = Device(devnum=0)
  cam.setResolution(1280, 960)

  cam.saveSnapshot('%s.png' % (b))

for i in range(1, 100000):
  capt()

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淡淡離愁欲言轉身 2024-11-07 02:08:42

尝试使用 cam.getImage 而不是 cam.saveSnapshot 。 cam.getImage 返回 PIL 图像，因此您可以确定是否实际抓取了任何帧。
以下代码未经测试：

from VideoCapture import Device
import datetime
def capt():
  a = datetime.datetime.now().strftime("%Y%m%dT%H%M%S%ms")

  b = str(a)
  cam = Device(devnum=0)
  cam.setResolution(1280, 960)

  return cam.getImage(), b

while True:
  im, b = capt()
  if im:
    break
im.save('%s.png' % (b), 'JPEG')

Try to use cam.getImage instead of cam.saveSnapshot. cam.getImage returns PIL image, thus you are able to determine whether any frame has been actually grabbed or not.
The folloing code hasnt been tested:

from VideoCapture import Device
import datetime
def capt():
  a = datetime.datetime.now().strftime("%Y%m%dT%H%M%S%ms")

  b = str(a)
  cam = Device(devnum=0)
  cam.setResolution(1280, 960)

  return cam.getImage(), b

while True:
  im, b = capt()
  if im:
    break
im.save('%s.png' % (b), 'JPEG')

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