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• ffmpeg - escaping single quotes doesn't work [duplicate]

  18 septembre 2022, par XorOrNor

  I've written a small python script for mass converting audio files. It uses ffmpeg. The problem is it doesn't work for files with single quotes in their filenames.

  


  script :

  


  
import os
import subprocess
import sys
from multiprocessing.pool import ThreadPool as Pool

source_dir="/home/kris/Music/test"
output_dir="/home/kris/Music/test_opus"

def worker(file):

    try:    
        dirname=os.path.dirname(file)
        file=file.replace("'","\\\\'")
        filename=file.split('.flac')[0]
        
        input_file=f"'{source_dir}/{file}'"
        output_file=f"'{output_dir}/{filename}.opus'"
        cmd="ffmpeg -n -i "+input_file+" -c:a libopus -b:a 320k "+output_file
        print(cmd)
        result = subprocess.call(cmd,stdout=subprocess.PIPE,shell=True)
    except:
        print('item error')
        

def start():    
    threads=os.cpu_count()  
    pool = Pool(threads)
    files=os.listdir(source_dir)
    for item in files:
        pool.apply_async(worker, (item,))

    pool.close()
    pool.join()
        
start()



  


  Testing :

  


  


  1. Filename : I'm a file.flac

     


  


  2. When escaping single quote ' with double backslashes \\ - file=file.replace("'","\\\\'") the cmd for ffmpeg is :

     


  


  


  ffmpeg -n -i '/home/kris/Music/test/I\\'m a file.flac' -c:a libopus -b:a 320k '/home/kris/Music/test_opus/I\\'m a file.opus'


  


  ffmpeg returns an error : /home/kris/Music/test/I\\m: No such file or directory

  


  

  3. When escaping single quote ' with a single backslash \ - file=file.replace("'","\\'") the cmd for ffmpeg is :

  


  


  ffmpeg -n -i '/home/kris/Music/test/I\'m a file.flac' -c:a libopus -b:a 320k '/home/kris/Music/test_opus/I\'m a file.opus'


  


  I got an error :

  


  /bin/sh: 1: Syntax error: Unterminated quoted string


  


  According to ffmpeg docs : https://ffmpeg.org/ffmpeg-utils.html#toc-Examples escaping with single backslash should work.

  


• ffmpeg won't stop encoding, even with -shortest command

  3 mai 2017, par smartzer

  I am having an issue with ffmpeg stopping the encoding process, and searching on the internet has gotten me no working solutions. I am calling ffmpeg in Linux through Python’s subprocess module, as so :

  mergeFiles = subprocess.Popen("ffmpeg -i /home/pi/Video/video.mov -i /home/pi/Audio/test.wav -acodec copy -vcodec copy -map 0:v -map 1:a -shortest /home/pi/Final/output.mkv", shell=True)

  The command prompt is waiting for me to manually end the encoding process with "ctrl-c", but I won’t have access to a keyboard to kill the encoding. I just want it to stop when it’s done. I have even attempted to use mergeFiles.kill() from Python after a couple seconds, and that doesn’t even work. Help !

  EDIT : If I wasn’t clear, I meant that there is no error, ffmpeg simply won’t continue until I hit "ctrl-c". I just want it to stop encoding when it’s done. This is what my command prompt looks like :

  It’s just waiting for me to press "ctrl-c"

• streaming automatically (on boot) using init.d scripts

  15 juillet 2014, par Aldo Daniel

  I am using Hackberry A10 with a Linaro 3.0.101 distro.
  I am trying to run ffserver and ffmpeg to stream audio and video at the same time. From terminal, these are possible. But now I want to make them run at the start of my device’s boot.

  The script contains :

  case "$1" in

  start)

  cd /home/linaro/bin/

  ./ffserver -f /home/linaro/Desktop/mpeg.conf &

  ./ffmpeg [ code ] &

   ; ;

  esac

  exit 0

  After that I type the following commands :

  chmod 755 [scriptname]

  update-rc.d [scriptname] defaults

  After I reboot the device, nothing happens. The camera light does not turn on. But when I try to run ffserver with the same configuration, it does not allow me, nor does it tell me that there is an error.

  Can anyone help me with this problem ? Thanks in advance !