[Tutor] Does python change subprocess based on whether it is run in the interactive shell or not

[Nathan Smith]

Hello,


I have some code like so:


     p = subprocess.Popen(cmd, stdout=subprocess.PIPE, 
stdin=subprocess.PIPE, stderr=subprocess.PIPE)
     [stdout, stderr]=p.communicate(data)


Where data is some data taken from io.bytesIO.read

And cmd is a command for ffmpeg like so:

cmd="ffmpeg/ffmpeg.exe -f wav -ac 2 -i - -f mp3 -ab 128000 - -y"


When run in an interactive shell this works like a charm. When run in a 
script file, this breaks. At first I thought it was an issue with 
FFMPEG, but now I'm wondering if python is changing something under the 
hood?

When running from a script, should I be using shell=True?


thanks in advance,

Nathan

-- 

Best Wishes,

Nathan Smith, BSC


My Website: https://nathantech.net