我正在緩慢地嘗試將一個舊的python 2代碼轉(zhuǎn)換為python 3，但是我遇到了一個障礙，代碼如下：seconds = functools.reduce(lambda x,y:x*60+y,map(int,duration.split(":")))

這給了我：TypeError: 'str' does not support the buffer interface

我把它改成：

^{pr2}$

這使得下面的rate = frames/seconds給了我這個錯誤：TypeError: unsupported operand type(s) for /: 'float' and 'bytes'

所以我試著把原來的字符串轉(zhuǎn)換成這樣的浮點seconds = float(functools.reduce(lambda x,y:x*60+y,map(int,duration.split(":"))))

但結(jié)果就是TypeError: 'str' does not support the buffer interface

誰能看看嗎？在import sys,os,re

import functools

from subprocess import *

if len(sys.argv)<=1:

print ("usage: python oneinn.py filename frames")

sys.exit(0)

try:

fvideo = sys.argv[1]

frames = float(sys.argv[2])

except:

sys.stderr.write("Failed to parse parameters.\n")

sys.exit(1)

output = Popen(["ffmpeg", "-i", fvideo], stderr=PIPE).communicate()

# searching and parsing "Duration: 00:05:24.13," from ffmpeg stderr, ignoring the centiseconds

re_duration = re.compile("Duration: (.*?)\.")

duration = b're_duration.search(output[1]).groups()[0]'

seconds = float(functools.reduce(lambda x,y:x*60+y,map(int,duration.split(":"))))

rate = frames/seconds

print ("Duration = %s (%i seconds)" % (duration, seconds))

print ("Capturing one frame every %.1f seconds" % (1/rate))

output = Popen(["ffmpeg", "-i", fvideo, "-r", str(rate), "-vcodec", "png", 'Preview-%d.png']).communicate()

總結(jié)

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