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• Unable to find a suitable output format for x. x invalid argument

  16 août 2018, par Tahtakafa

  I want to concat 2 videos with their audio. If i try the code below it gives an error. In each syntax error it gives invalid argument error. I couldn’t figure out what is proper syntax. Is concating with ffmpeg has to be so problematic ?

  code :

  ffmpeg -i /var/www/html/GetVideo/reklam/muzikli1.mp4 -i /var/www/html/GetVideo/reklam/muzikli2.mp4 -filter complex "[0:v:0] [0:a:0] [1:v:0] [1:a:0] concat=n=2:v=1:a=1 [v] [a]" -map "[v]" -map "[a]" /var/www/html/GetVideo/reklam/out.mp4

  error :

  Unable to find a suitable output format for '[0:v:0] [0:a:0] [1:v:0] [1:a:0] concat=n=2:v=1:a=1 [v] [a]'
  
  [0:v:0] [0:a:0] [1:v:0] [1:a:0] concat=n=2:v=1:a=1 [v] [a]: Invalid argument

• awkward behaviour in bash find-loop with ffmpeg

  25 avril 2018, par Alexander

  There is something weird going on when running following script with Docker.

  The dockerfile for this is :

  FROM debian:9
  
  WORKDIR /app
  
  RUN apt-get -y update && \
  
      apt-get -y install ffmpeg curl
  
  COPY . /app

  The script run.sh :

  #!/bin/bash
  
  find /pfs/in -maxdepth 1 -name "*.flac" -print0 | while IFS= read -r -d $'\0' inFile; do
  
      echo "\n##### Process '${inFile}' #####"
  
      ffmpeg -y -i ${inFile} -ar 16000 tmp.wav # use 16kHz - default for EML
  
  done

  Starting this, when mounting 3 files into the container :

  $ ls pfs/in/
  
  Testaudio16k_2.flac  Testaudio16k.flac  Testaudio16k.wav  TestSprache_Saetze.flac
  
  $ docker run --rm -t -v $(pwd)/pfs/in:/pfs/in test-img:latest /bin/bash run.sh

  I get an error on processing the second file : pfs/in/Testaudio16k_2.flac: No such file or directory. The leading / is missing. It is also missing in the preceeding echo. Indeed this happens every second file (if I put more than 3 files in that folder).

  Now coming to the counter example :
  If I comment out the ffmpeg line in the script, rebuild and run, The echo prints for every file the correct path.

  Does anybody have an idea about this ?
  Is it about the find or is the ffmpegdoing something weird ? Something completely different ?

• ProcessBuilder Can't Find a File for Conversion ?

  19 avril 2018, par Sarah Szabo

  I’m running a simple script (On a Kubuntu 17.10 OS) to convert from a .mp4 file to .opus, not that this really matters though. I’ve verified that the command works as intended by making the program print out the command, then navigating to the directory and executing it there. It works and converts the file to .opus.

  The problem is that when it is run via process builder, it no longer works. I can’t understand why, as the process should be localized by calling the .directory(temporary-folder-path) method. Yet, in the output of ffmpeg when it runs via the program, seems to indicate that it can’t find the file, which is in the the temp folder.

  private void processOP(String... commands) throws InterruptedException, IOException {
  
      System.out.println("About to Initiate (Temp Folder Path): " + this.diskManager.getTempDirectory());
  
      //Print out FFMPEG Command
  
      String s = "";
  
      for (String st : new ProcessBuilder(commands)
  
              .directory(this.diskManager.getTempDirectory().toFile()).inheritIO().command()) {
  
          s += " " + st;
  
      }
  
      System.out.println("COMMAND: " + s);
  
      //Actually do it
  
      Process proc = new ProcessBuilder(commands)
  
              .directory(this.diskManager.getTempDirectory().toFile()).inheritIO().start();
  
      proc.waitFor();
  
  }

  The output yields the temporary folder directory and the command :

  About to Initiate (Temp Folder Path): /tmp/OPUS Converter Temporary Directory5521626892860463135
  
  COMMAND:  ffmpeg -i "Sarah Szabo -- The Fourtyth Divide.mp4" -y -b:a 320k -metadata title="The Fourtyth Divide" -metadata artist="Sarah Szabo" "Sarah Szabo -- The Fourtyth Divide.opus"

  And Execution Reveals that the conversion attempt fails due to not being able to find the file :

  ffmpeg version 3.3.4-2 Copyright (c) 2000-2017 the FFmpeg developers
  
  built with gcc 7 (Ubuntu 7.2.0-8ubuntu2)

  (Lots of FFMPEG Stuff)

  Then :

  "Sarah Szabo -- The Fourtyth Divide.mp4": No such file or directory

  This is mysterious because I’ve executed the very same code in a localized terminal at the temporary directory. It converts successfully. This leads me to believe that somehow this is a localization issue. I should add that I’ve checked the file path to the temp directory as well, this is the folder that I’ve intended and isn’t some other one. It contains the file as well. There are no spelling mistakes that I can detect in the filenames, and i have checked them, as well as copy-pasting them to ensure that there are no misspellings.

  Picture of the temp directory :