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• How to install FFmpeg on a Linux server using SSH [closed]

  29 janvier 2013, par user2019961

  I've been trying my hardest and I can't seem to find a straight answer ; I have the latest version of FFmpeg downloaded and uploaded to my server, SSH enabled and I can get into the shell command prompt but I can't figure out how to actually install it. IT says just to type ./configure but that does nothing. Can anyone help me to install it ?

• 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.

• 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)