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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.

  


• Missing audio stream which is required by this ffm at Raspberry PI using ffmpeg

  17 mai 2014, par batuman

  I am trying to stream video from my Raspberry PI using ffserver, raspivid and ffmpeg. My command is as follow

  ffserver -f /etc/ffserver.conf & raspivid -vf -t 0 -w 450 -h 200 -fps 25 -b 2000000 -o - | ffmpeg -f h264 -r 25 -c:v h264 -i - -c:v libx264 -c:a libmp3lame http://localhost:8090/feed1.ffm

  It looks working, I see the video displayed on the monitor and got the error as

  Missing audio stream which is required by this ffm

  The whole output at console is as follow.

  ffmpeg version 2.2.git Copyright (c) 2000-2014 the FFmpeg developers
  
    built on May 10 2014 17:04:06 with gcc 4.6 (Debian 4.6.3-14+rpi1)
  
    configuration: --prefix=/home/pi/ffmpeg_build --extra-cflags=-I/home/pi/ffmpeg_build/include --extra-ldflags=-L/home/pi/ffmpeg_build/lib --bindir=/home/pi/bin --extra-libs=-ldl --enable-gpl --enable-libass --enable-libfdk-aac --enable-libfreetype --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-nonfree --enable-x11grab
  
    libavutil      52. 82.100 / 52. 82.100
  
    libavcodec     55. 60.103 / 55. 60.103
  
    libavformat    55. 37.102 / 55. 37.102
  
    libavdevice    55. 13.101 / 55. 13.101
  
    libavfilter     4.  5.100 /  4.  5.100
  
    libswscale      2.  6.100 /  2.  6.100
  
    libswresample   0. 18.100 /  0. 18.100
  
    libpostproc    52.  3.100 / 52.  3.100
  
  Input #0, h264, from 'pipe:':
  
    Duration: N/A, bitrate: N/A
  
      Stream #0:0: Video: h264 (High), yuv420p, 450x200, 25 fps, 25 tbr, 1200k tbn, 50 tbc
  
  Sat May 17 07:10:56 2014 127.0.0.1 - - [GET] "/feed1.ffm HTTP/1.1" 200 4175
  
  Missing audio stream which is required by this ffm

  I searched and found that I have to use blank audio using libmp3lame. Is it the only way to do ?And can’t find installer for linux for libmp3lame.

• ImportError : FFmpeg libraries are not found. Please install FFmpeg in ubuntu 22.04 LTS

  8 juin 2023, par Schrödinger's Cat

  Here i am using diart library for audio transcription using whisper open ai model model for one dependency is throwing error that i mention in the question here is my

  


  Traceback (most recent call last):&#xA;File "/home/vkyc/Desktop/projectRasa/audio/lib/python3.10/site- &#xA;packages/torchaudio/_extension.py", line 71, in _init_ffmpeg&#xA;_load_lib("libtorchaudio_ffmpeg")&#xA;File "/home/vkyc/Desktop/projectRasa/audio/lib/python3.10/site- &#xA;packages/torchaudio/_extension.py", line 52, in _load_lib&#xA;torch.ops.load_library(path)&#xA;File "/home/vkyc/Desktop/projectRasa/audio/lib/python3.10/site- &#xA;packages/torch/_ops.py", &#xA;line 573, in load_library&#xA;ctypes.CDLL(path)&#xA;File "/usr/lib/python3.10/ctypes/__init__.py", line 374, in __init__&#xA;self._handle = _dlopen(self._name, mode)&#xA;OSError: libavdevice.so.58: cannot open shared object file: No such file or directory&#xA;&#xA;The above exception was the direct cause of the following exception:&#xA;&#xA;Traceback (most recent call last):&#xA;File "/home/vkyc/Desktop/audio_streaming/LiveStream.py", line 13, in <module>&#xA;from diart.sources import MicrophoneAudioSource&#xA;File "/home/vkyc/Desktop/projectRasa/audio/lib/python3.10/site- &#xA;packages/diart/sources.py", line 11, in <module>&#xA;from torchaudio.io import StreamReader&#xA;File "/home/vkyc/Desktop/projectRasa/audio/lib/python3.10/site- &#xA;packages/torchaudio/io/__init__.py", line 21, in __getattr__&#xA;torchaudio._extension._init_ffmpeg()&#xA;File "/home/vkyc/Desktop/projectRasa/audio/lib/python3.10/site- &#xA;packages/torchaudio/_extension.py", line 73, in _init_ffmpeg&#xA;raise ImportError("FFmpeg libraries are not found. Please install FFmpeg.") from err&#xA;ImportError: FFmpeg libraries are not found. Please install FFmpeg.&#xA;</module></module>

  


  i tried pip install python-ffmpeg
also install from system using the command sudo apt install ffmpeg
although all ffmpeg install on system using pip and also from terminal using sudo apt command but still throwing same error

  


  ImportError: FFmpeg libraries are not found. Please install 
FFmpeg


  


  if any one know about please resove this error