Recherche avancée

Sur d’autres sites (7053)

• Pydub installation and ffmpeg

  6 août 2021, par Lone Lunatic

  I was trying to get raw sound data out of a .mp3 file. Therefor I used the pydub module as stated here. I created a venv for this project and installed all necessary modules. But for some reason, pydub decided to give me an FileNotFoundError :

  



  (venv) Python-IT:LightsDev pythonit$ which python
/Users/pythonit/Documents/Programmieren/Python/LightsDev/venv/bin/python
(venv) Python-IT:LightsDev pythonit$ which pip3
/Users/pythonit/Documents/Programmieren/Python/LightsDev/venv/bin/pip3
(venv) Python-IT:LightsDev pythonit$ pip3 list 
------------- -------
ffmpeg        1.4
pip           18.1
pydub         0.23.0
pyee          5.0.0
python-ffmpeg 1.0.5
setuptools    39.0.1


  



  My exact code looks like that :

  



  from pydub import AudioSegment
sound = AudioSegment.from_mp3('test.mp3')
raw_data = sound._data
print(raw_data)


  



  and I get this error :

  



  FileNotFoundError: [Errno 2] No such file or directory: 'ffprobe': 'ffprobe'


  



  alongside this runtime warning :

  



  RuntimeWarning: Couldn't find ffmpeg or avconv - defaulting to ffmpeg, but may not work
warn("Couldn't find ffmpeg or avconv - defaulting to ffmpeg, but may not work", RuntimeWarning)


  



  I don't know if it is me, but some similar questions stating I should install ffmpeg or python-ffmpeg won't work. I can even import the ffmpeg module but nothing happens. I can work with ffmpeg and load files but using it with pydub won't work.

  



  EDIT : Today I changed to my windows machine and looked at the error in-depth. However I didn't manage to get it working, even with the solution provided in the comments (thank you though). I installed the ffmpeg binary as stated and i was able to get ffmpeg running in the shell, however not with pydub... I have no clue what is going on. I guess my mistake is very obvious and I am just not able to get it. Even not subprocess was able to solve this problem despite the fact, that I am able to use ffmpeg in shell. I even was able to convert the file using ffmpeg in shell...

  



   ffmpeg -i test.mp3 test.wav 
 > Output #0, wav, to 'test.wav':


  



  I think I am close to solve the problem myself anyways, but thank you anyways.

  


• Python subprocess. Linux vs Windows

  23 mai 2021, par Chris

  I wonder if someone can help explain what is happening ?

  


  I run 2 subprocesses, 1 for ffprobe and 1 for ffmpeg.

  


  popen = subprocess.Popen(ffprobecmd, stderr=subprocess.PIPE, shell=True)


  


  And

  


  popen = subprocess.Popen(ffmpegcmd, shell=True, stdout=subprocess.PIPE)


  


  On both Windows and Linux the ffprobe command fires, finishes and gets removed from taskmanager/htop. But only on Windows does the same happen to ffmpeg. On Linux the command remains in htop...

  


  

  


  Can anyone explain what is going on, if it matters and how I can stop it from happening please ?

  


  EDIT : Here are the commands...

  


  ffprobecmd = 'ffprobe' + \
' -user_agent "' + request.headers['User-Agent'] + '"' + \
' -headers "Referer: ' + request.headers['Referer'] + '"' + \
' -timeout "5000000"' + \
' -v error -select_streams v -show_entries stream=height -of default=nw=1:nk=1' + \
' -i "' + request.url + '"'


  


  and

  


  ffmpegcmd = 'ffmpeg' + \
' -re' + \
' -user_agent "' + r.headers['User-Agent'] + '"' + \
' -headers "Referer: ' + r.headers['Referer'] + '"' + \
' -timeout "10"' + \
' -i "' + r.url + '"' + \
' -c copy' + \
' -f mpegts' + \
' pipe:'


  


  EDIT : Here is a example that behaves as described...

  


  import flask
from flask import Response
import subprocess

app = flask.Flask(__name__)

@app.route('/', methods=['GET'])
def go():
    def stream(ffmpegcmd):
        popen = subprocess.Popen(ffmpegcmd, stdout=subprocess.PIPE, shell=True)
        try:
            for stdout_line in iter(popen.stdout.readline, ""):
                yield stdout_line
        except GeneratorExit:
            raise

    url = "https://bitdash-a.akamaihd.net/content/MI201109210084_1/m3u8s/f08e80da-bf1d-4e3d-8899-f0f6155f6efa.m3u8"

    ffmpegcmd = 'ffmpeg' + \
                ' -re' + \
                ' -timeout "10"' + \
                ' -i "' + url + '"' + \
                ' -c copy' + \
                ' -f mpegts' + \
                ' pipe:'
    return Response(stream(ffmpegcmd))

if __name__ == '__main__':
    app.run(host= '0.0.0.0', port=5000)


  


• How to make use of "&" command in TCL version 8.0 to make a proc or exec command run in background i.e in parallel on windows 7 ?

  21 novembre 2017, par M. D. P

  I am working on a project where I am using FFMPEG to capture video. The FFMPEG command is :

  ffmpeg -f dshow  -t 00:00:10 -i "video=Integrated Webcam" -b 5000k -s 1280x720 c:/test/sample.avi

  The link : https://www.tcl.tk/man/tcl8.5/tutorial/Tcl26.html make the use of the command :

  exec myprog &

  Here they have not specified what is myprog.

  The link : Running shell commands in background, in a tcl proc make the use of command :

   eval exec [linsert $args 0 exec] >> $tempFile &

  Here the command is not accepted as eval and exec is one after another, so it takes exec as a variable.

  Help me, with the write right command which can be used to capture my video in the background with TCL version 8.0 and Windows 7.