ffmpeg pipe in python - pipe:: Operation not permitted

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ffmpeg pipe in python - pipe:: Operation not permitted

speedyrazor
Hi, I am having trouble getting an ffmpeg pipe to work using VapourSynth and Python Popen commands (I know this may not be the place to ask this, but I am out of ideas). Running the pipe command on its own on Windows terminal it works correctly. Here is the python commands:import subprocess
import os
from subprocess import Popen, PIPE, STDOUT
import time

command1 = 'F:/ffmpeg/VapourSynth/VSPipe.exe --y4m C:/Users/myself/Desktop/script.vpy -'
command2 = 'F:/ffmpeg/ffmpeg.exe -f yuv4mpegpipe -i - -c:v prores -an //192.168.0.100/media/temp/OutMov.mov -report'

process1 = Popen(command1, stdout=PIPE, shell=False)
process2 = Popen(command2, stdin=process1.stdout, stderr=PIPE)

while True:
    line = process2.stderr.readline().decode('utf-8')
    print line
Running this with an ffmpeg report produces this, pipe:: Operation not permitted.F:/ffmpeg/ffmpeg.exe -f yuv4mpegpipe -i - -c:v prores -an -y //192.168.0.100/media/temp/OutMov.mov -report
ffmpeg version N-77203-gb8e5b1d Copyright (c) 2000-2015 the FFmpeg developers
  built with gcc 5.2.0 (GCC)
  configuration: --arch=x86 --target-os=mingw32 --cross-prefix=/Users/myself/Desktop/Download/ffmpeg-windows-build-helpers-master/sandbox/mingw-w64-i686/bin/i686-w64-mingw32- --pkg-config=pkg-config --disable-w32threads --enable-gpl --enable-libsoxr --enable-fontconfig --enable-libass --enable-libutvideo --enable-libbluray --enable-iconv --enable-libtwolame --extra-cflags=-DLIBTWOLAME_STATIC --enable-libzvbi --enable-libcaca --enable-libmodplug --extra-libs=-lstdc++ --extra-libs=-lpng --enable-libvidstab --enable-libx265 --enable-decklink --extra-libs=-loleaut32 --enable-libx264 --enable-libxvid --enable-libmp3lame --enable-version3 --enable-zlib --enable-librtmp --enable-libvorbis --enable-libtheora --enable-libspeex --enable-libopenjpeg --enable-gnutls --enable-libgsm --enable-libfreetype --enable-libopus --enable-frei0r --enable-filter=frei0r --enable-libvo-aacenc --enable-bzlib --enable-libxavs --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libvo-amrwbenc --enable-libschroedinger --enable-li  libavutil      55. 10.100 / 55. 10.100
  libavcodec     57. 17.100 / 57. 17.100
  libavformat    57. 19.100 / 57. 19.100
  libavdevice    57.  0.100 / 57.  0.100
  libavfilter     6. 20.100 /  6. 20.100
  libswscale      4.  0.100 /  4.  0.100
  libswresample   2.  0.101 /  2.  0.101
  libpostproc    54.  0.100 / 54.  0.100
Splitting the commandline.
Reading option '-f' ... matched as option 'f' (force format) with argument 'yuv4mpegpipe'.
Reading option '-i' ... matched as input file with argument '-'.
Reading option '-c:v' ... matched as option 'c' (codec name) with argument 'prores'.
Reading option '-an' ... matched as option 'an' (disable audio) with argument '1'.
Reading option '-y' ... matched as option 'y' (overwrite output files) with argument '1'.
Reading option '//192.168.0.100/media/temp/OutMov.mov' ... matched as output file.
Reading option '-report' ... matched as option 'report' (generate a report) with argument '1'.
Finished splitting the commandline.
Parsing a group of options: global .
Applying option y (overwrite output files) with argument 1.
Applying option report (generate a report) with argument 1.
Successfully parsed a group of options.
Parsing a group of options: input file -.
Applying option f (force format) with argument yuv4mpegpipe.
Successfully parsed a group of options.
Opening an input file: -.
[AVIOContext @ 006d9800] Statistics: 0 bytes read, 0 seeks
pipe:: Operation not permitted    
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