Please add SW_HIDE to ffmpeg subprocess.Popen in windows, please

[goodandrewsoft]

If windows , please add (optionally):
pseudo code

https://github.com/ytdl-org/youtube-dl/blob/master/youtube_dl/postprocessor/ffmpeg.py#L230

si = None
if (OS == 'windows'):
        SW_HIDE = 0
        STARTF_USESHOWWINDOW = 1
        si = subprocess.STARTUPINFO()
        si.dwFlags = STARTF_USESHOWWINDOW
        si.wShowWindow = SW_HIDE
        
    p = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE, stdin=subprocess.PIPE, startupinfo=si)

for avoid console, if script started in NOT console :)

[steam3d]

We need this!

[goodandrewsoft]

Temporary solution:
Add before run youtube-dl

import subprocess
class ProxySubprocessPopen(subprocess.Popen):

    if (sys.platform == "win32"):
        # noinspection PyUnresolvedReferences
        def _execute_child(self, args, executable, preexec_fn, close_fds,
                           cwd, env, universal_newlines,
                           startupinfo, *kwargs):
            if startupinfo is None:
                startupinfo = subprocess.STARTUPINFO()
            startupinfo.dwFlags = 1
            startupinfo.wShowWindow = 0
            super(ProxySubprocessPopen, self)._execute_child(args, executable, preexec_fn, close_fds,
                                                             cwd, env, universal_newlines,
                                                             startupinfo, *kwargs)


subprocess.Popen = ProxySubprocessPopen