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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/

  


• How to download a video from m3u8 with aes-128, IV with FFMPEG ? [closed]

  13 avril 2021, par AWrr

  I've tried with a tutorial that prompted me to download the m3u8 file and then stream it with vlc but that didn't work. It just created a 160 bytes .mp4 file that couldn't be played.

  


  When I opened it, it contains a line in the form of :

  


  #EXT-X-KEY:METHOD=AES-128,URI="license://G",IV=0x08

  


  I've read some threads talking aboout a .key file, but this one doesn't have a .key in the "URI=" section and I don't really knoe how to get one, if I needed it.

  


  Will ffmpeg -i playlist.m3u8 -c copy -bsf:a aac_adtstoasc output.mkv work just fine ?

  


  Edit : I've tried it and it showed this :

  


  At the start
 Unable to open key file

  


  At the end

  


    Stream #0:0 -> #0:0 (copy)
Press [q] to stop, [?] for help
size=     494kB time=00:00:00.00 bitrate=N/A speed=   0x
video:0kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
Output file is empty, nothing was encoded (check -ss / -t / -frames parameters if used)```



  


• ffmpeg doesn't respect the transparency of the overlayed image by default

  12 avril 2021, par user15602767

  Here is what I am running

  


  ffmpeg -i urban_pop.mp4 -i C:/Users/hp/Documents/Projects/raceit/logos/logo.png -filter_complex "overlay=540:95" output.mp4


  


  But the original image has transparent areas and opaque areas. I want the transparent areas to remain transparent so that we can see the video through those areas. How can I do it ?

  


  As per docs here I can see it should respoect transparency by default
https://ffmpeg.org/ffmpeg-filters.html#Examples-88
Help me understand what I am doing wrong

  


  Note that I am not talking about customizing the overall transparency of the image while overlaying, but to load the image itself maintaining its original transparency