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• Shutil not detecting ffmpeg module and python3 incorrectly, all when compiled with pyinstaller

  9 juin 2021, par vanilla

  Right now I am almost finished with my version of my app. The last thing I am having trouble with is detecting the FFmpeg module, to warn users that they need it for certain features that have been added this version. When I run the script through my python interpreter in terminal, which the directories of it is in my library frameworks directory, The shutil will run as expected and return the version or whatever as I do have it installed. However, when I compile it and launch specifically the one windowed, with no console output, it doesn’t work. Now what I mean by that it returns none type.

  


  From talking to someone in my previous Reddit thread I tried printing out python3 and seeing what directories that would bring with shutil.which(‘python3’). Interesting enough, when put into my tkinter text field (don't have a console) it would bring up my python binary from the directory /usr/bin/python3. The one I have all my modules for it and everything installed on is the one :

  


  >>> import shutil
>>> print(shutil.which('python3'))
/Library/Frameworks/Python.framework/Versions/3.9/bin/python3


  


  So we can see that there are to installations or whatever of python3 interpreters (I believe I am saying this right), and I am confused on maybe I am being hinted to use the python3 binary from /usr/bin/ to compile it with pyinstaller and install the needed modules with /usr/bin/pip3 with it ?

  


  A user from the reddit thread I made below made a alternative :

  


  


  I tested it on my computer after fixing a bug, and both the shutil and os methods work. It seems to be a problem on your end, which is strange. What version of Python do you have ? Also in your script right above testing for ffmpeg, try inserting this line :
print('ffmpeg' in os.listdir('/usr/local/bin'))

  


  


  This other method with os unfortunately returned a None as well. I am ultimately trying to have some kind of method to reliably detect ffmpegs's binary on all operating systems. If anyone can provide some insight as to what may cause problems similar to these or knows other solutions, or can identify some kind of hiccup I can avoid that would be amazing.

  


  I have a hunch since shutil when compiled returned the bin directory for python3 instead of the framework one that actually has all the modules installed, that could mean something to me to try using pyinstaller with that one instead ?

  


  Thanks !

  


  https://www.reddit.com/r/learnpython/comments/nu3a1d/functionallity_supposedly_of_shutilwhichffmpeg/

  


• Convert audo from 2.0 to 5.1 for TVHeadend IPTV from m3ub stream using ffmpeg pipe

  17 mai 2020, par Brad T

  Right now, I have TVHeadend successfully setup to stream an m3ub as an IPTV channel with :

  



  pipe:///usr/bin/ffmpeg -i https://STREAM.m3u8 -c copy -f mpegts pipe:1

  



  but I want to convert the audio from 2.0 to 5.1 where the left and right audio is just copied to all the 5.1 channels. For example, instead of only hearing voice dialog on the center channel I want to hear it on all channels. If you're wondering why, this 5.1 system isn't really for making a surround sound experience so much as it is to bring the voice "closer" to the person.

  



  I'm using a raspberry pi 4 with raspian buster lite.

  


• Pass ffmpeg Stream to cv2

  28 avril 2021, par Georg

  I would like to use the redirection operator to bring the stream from ffmpeg to cv2 so that I can recognize or mark the faces on the stream and redirect this stream again so that it runs under another stream.

  


  One withoutfacedetect and One withfacedetect.

  


  raspivid -w 1920 -h 1080 -fps 30 -o - -t 0 -vf -hf -b 6000000 | ffmpeg -f h264 -i - -vcodec copy -acodec aac -ab 128k -g 50 -strict experimental -f tee -map 0:v "[f=flv]rtmp://xx.xx.xx.xx/live/withoutfacedetect |[f=h264]pipe:1" > test.mp4


  


  I then read up on CV2 and came across the article.

  


  https://www.bogotobogo.com/python/OpenCV_Python/python_opencv3_Image_Object_Detection_Face_Detection_Haar_Cascade_Classifiers.php

  


  I then ran the script with my picture and was very amazed that there was a square around my face.

  


  But now back to business. What is the best way to do this ?