当我使用OSError时遇到MoviePy

Question

我编写了一个程序，将特定文件夹中的所有视频转换为15秒gifs。它获取每个视频，制作不同长度的子片段，并将这些子片段连接成一个15秒的视频文件。

但是，在使用MoviePy处理一些视频时，我遇到了一些错误。：

Traceback (most recent call last):
  File "C:\Users\...\Desktop\Python\Test\15secondsgifs.py", line 75, in <module>
    main()
  File "C:\Users\...\Desktop\Python\Test\15secondsgifs.py", line 69, in main
    short_clip = make_clips(vid,clip_dur,i,parts)
  File "C:\Users\...\Desktop\Python\Test\15secondsgifs.py", line 30, in make_clips
    clip = (vid.subclip(t1, t2))
  File "<decorator-gen-39>", line 2, in subclip
  File "C:\Users\...\AppData\Local\Programs\Python\Python35-32\lib\site-packages\moviepy\decorators.py", line 89, in wrapper
    return f(*new_a, **new_kw)
  File "<decorator-gen-38>", line 2, in subclip
  File "C:\Users\...\AppData\Local\Programs\Python\Python35-32\lib\site-packages\moviepy\decorators.py", line 29, in apply_to_mask
    newclip = f(clip, *a, **k)
  File "<decorator-gen-37>", line 2, in subclip
  File "C:\Users\...\AppData\Local\Programs\Python\Python35-32\lib\site-packages\moviepy\decorators.py", line 41, in apply_to_audio
    newclip = f(clip, *a, **k)
  File "C:\Users\...\AppData\Local\Programs\Python\Python35-32\lib\site-packages\moviepy\Clip.py", line 391, in subclip
    newclip = self.fl_time(lambda t: t + t_start, apply_to=[])
  File "C:\Users\...\AppData\Local\Programs\Python\Python35-32\lib\site-packages\moviepy\Clip.py", line 189, in fl_time
    keep_duration=keep_duration)
  File "C:\Users\...\AppData\Local\Programs\Python\Python35-32\lib\site-packages\moviepy\Clip.py", line 136, in fl
    newclip = self.set_make_frame(lambda t: fun(self.get_frame, t))
  File "<decorator-gen-57>", line 2, in set_make_frame
  File "C:\Users\...\AppData\Local\Programs\Python\Python35-32\lib\site-packages\moviepy\decorators.py", line 14, in outplace
    f(newclip, *a, **k)
  File "C:\Users\...\AppData\Local\Programs\Python\Python35-32\lib\site-packages\moviepy\video\VideoClip.py", line 694, in set_make_frame
    self.size = self.get_frame(0).shape[:2][::-1]
  File "<decorator-gen-14>", line 2, in get_frame
  File "C:\Users\...\AppData\Local\Programs\Python\Python35-32\lib\site-packages\moviepy\decorators.py", line 89, in wrapper
    return f(*new_a, **new_kw)
  File "C:\Users\...\AppData\Local\Programs\Python\Python35-32\lib\site-packages\moviepy\Clip.py", line 95, in get_frame
    return self.make_frame(t)
  File "C:\Users\...\AppData\Local\Programs\Python\Python35-32\lib\site-packages\moviepy\Clip.py", line 136, in <lambda>
    newclip = self.set_make_frame(lambda t: fun(self.get_frame, t))
  File "C:\Users\...\AppData\Local\Programs\Python\Python35-32\lib\site-packages\moviepy\Clip.py", line 188, in <lambda>
    return self.fl(lambda gf, t: gf(t_func(t)), apply_to,
  File "<decorator-gen-14>", line 2, in get_frame
  File "C:\Users\...\AppData\Local\Programs\Python\Python35-32\lib\site-packages\moviepy\decorators.py", line 89, in wrapper
    return f(*new_a, **new_kw)
  File "C:\Users\...\AppData\Local\Programs\Python\Python35-32\lib\site-packages\moviepy\Clip.py", line 95, in get_frame
    return self.make_frame(t)
  File "C:\Users\...\AppData\Local\Programs\Python\Python35-32\lib\site-packages\moviepy\video\io\VideoFileClip.py", line 103, in <lambda>
    self.make_frame = lambda t: self.reader.get_frame(t)
  File "C:\Users\...\AppData\Local\Programs\Python\Python35-32\lib\site-packages\moviepy\video\io\ffmpeg_reader.py", line 175, in get_frame
    self.initialize(t)
  File "C:\Users\...\AppData\Local\Programs\Python\Python35-32\lib\site-packages\moviepy\video\io\ffmpeg_reader.py", line 103, in initialize
    self.proc = sp.Popen(cmd, **popen_params)
  File "C:\Users\...\AppData\Local\Programs\Python\Python35-32\lib\subprocess.py", line 842, in __init__
    _cleanup()
  File "C:\Users\...\AppData\Local\Programs\Python\Python35-32\lib\subprocess.py", line 505, in _cleanup
    res = inst._internal_poll(_deadstate=sys.maxsize)
  File "C:\Users\...\AppData\Local\Programs\Python\Python35-32\lib\subprocess.py", line 1259, in _internal_poll
    if _WaitForSingleObject(self._handle, 0) == _WAIT_OBJECT_0:
OSError: [WinError 6] The handle is invalid

我该怎么解决这个问题？

Answer 1

只有在我尝试迭代函数VideoFileClip时才会发生这种情况。我可以在windows上并行使用多处理来解决这个问题。

例如：

from multiprocessing.dummy import Pool as ThreadPool
# The number 5 is the number of iterations you need in parallel,
# for example if you want to process 5 videos with your function.
pool = ThreadPool(5)

#var1 and var2 or any number of vars should be a list
#pool.starmap will iterate these vars through your function in parallel 


  def myfunction(var1, var2):
         clip = VideoFileClip('path')
         #Do something
         clip.reader.close()
         clip.close()

pool.starmap(myfunction, zip(var1, var2))

显然，当您完成迭代时，如果您再次尝试使用VideoFileClip执行您的函数，您将得到句柄无效的错误，您将不得不重置您的jupyter笔记本，但至少您可以使用您的函数而不接收到任何os或python错误，使用pool.starmap所需的次数。