仅当从上下文菜单调用时，Python脚本才会在subprocess.run（）调用上执行失败

Question

我有一个python脚本，我想从Windows文件浏览器上下文菜单（https://www.howtogeek.com/107965/how-to-add-any-application-shortcut-to-windows-explorers-context-menu/）调用

我正在调试从非特定上下文（HKEY_CLASSES_ROOT \ Directory \ Background \ shell）调用它命令“python”D：\ toolbox \ mineAudio.py“0”（注意python3在路径上作为python和脚本在D：\ toolbox \ mineAudio.py）

当我从cmd调用脚本时，它使用该命令按预期工作，并且当我对脚本进行调试修改（将os.system（“pause”）添加到随机行时）我可以验证它是否正确运行直至它点击线meta=cmd(['ffmpeg','-i',target])（第46行），它立即无声地失败（注意ffmpeg也在路径上）

编辑：它实际上得到第15行result = subprocess.run(command, stdout=subprocess.PIPE,stderr=subprocess.PIPE,startupinfo=startupinfo) 我无法弄清楚为什么程序失败，因为该行在其他地方工作正常我从上下文菜单以外的其他测试过程。

如果你想浏览它，这是完整的脚本

import subprocess
import os
import sys
from sys import argv
from tree import tree
#for command line use:
#mineAudo.py [prompt=1] [dir=cwd]
#first arg prompt will prompt user for dir if 1, otherwise it wont
#second arg is the directory to use, if specified this will override prompt, if not and prompt=0, current working dir is used
def cmd(command):
    startupinfo = subprocess.STARTUPINFO()
    startupinfo.dwFlags |= subprocess.STARTF_USESHOWWINDOW
    startupinfo.wShowWindow = subprocess.SW_HIDE
    result = subprocess.run(command, stdout=subprocess.PIPE,stderr=subprocess.PIPE,startupinfo=startupinfo)
    return result.stderr.decode("utf-8")
def stripStreams(meta):
    i=1;
    lines=[]
    while i>0 :
        i=meta.find("Stream",i+1)
        lineEnd=meta.find("\n",i)
        lines.append(meta[i:lineEnd])

    return lines
def mineAudio(streams):
    ret=[]
    for stream in streams:
        if "Audio:" in stream:
            start =stream.find("#")+1
            end=stream.find("(",start)
            ret.append(stream[start:end])
    return ret
def convDir(dirTarget):
    targets=tree(dirTarget)
    convList(targets,dirTarget)

def convList(targets,dirTarget):
        print(targets)
        #target="2018-05-31 06-16-39.mp4"
        i=0
        for target in targets:
            i+=1

            if(target[target.rfind("."):]==".mp4"):
                print("("+str(i)+"/"+str(len(targets))+") starting file "+target)
                meta=cmd(['ffmpeg','-i',target])
                streams=stripStreams(meta)
                streams=mineAudio(streams)
                count=0
                output=target[target.rfind("/")+1:target.rfind(".")]
                file=target[target.rfind("/")+1:]
                #print (output)
                try:
                    os.mkdir(dirTarget+"\\"+output)
                except:
                    pass
                for s in streams:
                    print("converting track "+str(count+1)+" of "+str(len(streams)));
                    count+=1
                    cmd("ffmpeg -i \""+target+"\" -vn -sn -c:a mp3 -ab 192k -map "+s+" \""+dirTarget+"\\"+output+"\\"+output+" Track "+str(count)+".mp3\"")
                print("moving "+target+" to "+dirTarget+"\\"+output+"\\"+file)
                os.rename(target,dirTarget+"\\"+output+"\\"+file)
                print("Finished file "+target)
            else:
                print("("+str(i)+"/"+str(len(targets))+") skiping non mp4 file "+target)

def prompt():
    while True:
        dirTarget=input("input target dir: ")
        convDir(dirTarget)



if __name__ == "__main__":
        sys.setrecursionlimit(2000)    
        if len(argv)>2:
                if os.path.isdir(argv[2]):
                    convDir(argv[2])
                else:
                    convList([argv[2]],os.path.dirname(argv[2]))
        elif(len(argv)>1):
                if int(argv[1])==1:
                    prompt()
                else:
                    convDir(os.getcwd())
        else:
            prompt()


        os.system("pause")

请注意，我没有与这个特定的实现结合，任何具有相同效果的实现（自动从.mp4文件中提取.mp3轨道）也没关系

另外，这是文件树

#Returns the paths of all files in a directory and all sub directories relative to start directory
import os
def tree(directory,target="f"):
    paths=[]
    for currentDir,dirs,files in os.walk(directory):
        if target=="f":
            for file in files:
                paths.append(currentDir+"/"+file)
        if target=="d":
            #paths.append(currentDir)
            for dir in dirs:
                paths.append(currentDir+"/"+dir)
    for i in range(len(paths)):
        paths[i]=paths[i].replace("\\","/")
    return paths

任何人都可以帮我搞定这个吗？

编辑：这是一个较短的示例代码，以相同的方式崩溃（尽管仍然使用ffmpeg）

import subprocess
import os
def cmd(command):
    startupinfo = subprocess.STARTUPINFO()
    startupinfo.dwFlags |= subprocess.STARTF_USESHOWWINDOW
    startupinfo.wShowWindow = subprocess.SW_HIDE

    result = subprocess.run(command,stdin=subprocess.DEVNULL, stdout=subprocess.PIPE,stderr=subprocess.PIPE,startupinfo=startupinfo)

    return result.stderr.decode("utf-8")


os.system("pause")

out=cmd(['ffmpeg','-i','D:\\ffmpeg test\\test\\2018-05-31 06-16-39\\2018-05-31 06-16-39.mp4'])
print(out)
os.system("pause")

（注意文件是硬编码的，程序输出应该是）

Answer 1

我设法通过关于创建调用python脚本命令的批处理文件的hackish方式“解决”问题，但这看起来有点像黑客，我认为会有更好的方法。