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• Running ffmpeg silently on NodeJS (Windows)

  5 janvier 2021, par Paulo Bertotti

  I'm trying to run FFMPEG as a child process on NodeJS to extract a snapshot of an mp4 video on Windows. But even spawning the process with the "silent" option, it stills opening the command prompt for a short period. Any idea of what might be happening ?

  


  The code looks something like this :

  


  const snapshot = spawn(
              "ffmpeg",
              [
                "-ss",
                "00:00:07",
                "-i",
                `${this.directory}\\${file.name}`,
                "-vframes",
                "1",
                "-q:v",
                "2",
                `${this.directory}\\channel${this.channelNum}_snapshot.png`,
              ],
              { silent: true }
            );


  


• Unable To Add Comment Metadata to MP3 File Using Windows FFMPEG

  4 avril 2019, par Muldesia

  I’ve previously used FFMPEG to successfully add various ID3 tags to MP3 files. However, I’m having trouble adding a ’comment’ tag.

  ffmpeg -i "InputFile.wav" -metadata comment="comment text" "OutputFile.mp3"

  ffprobe.exe, when examing the output file, shows the comment tag with the expected value. If I then go into the file properties in Windows, and view the Details tab, I see an empty comments field. Also appears empty in iTunes.

  If I give a value to the ’comments’ field using the Window’s file properties window, and then run ffprobe on the file again, I can see the comment tag with the updated value. So Windows can write to it successfully. The tag name appears identical as to when I use FFMPEG to set the comment.

  Does FFMPEG support writing the comment ID3 tag to MP3 files ? If so, how can I do this ?

  Many thanks !

• Using && in Windows FileAssociation Action Commandline

  31 août 2017, par GavinBrelstaff

  I can use the && conjunction from within a standard Windows CMD shell to run two commands on the same line as such :

  "C:\Program Files (x86)\ffmpeg\ffmpeg.exe" -i "%1" -write_xing 0 -ac 2 -ar 24000 -ab 48k -id3v2_version 3 -write_id3v1 1 "%1".mp3 && DEL /Q "%1"

  • by which I delete the input file after having successfully converted it into mp3 output file using ffmpeg

  But the same line of code crashes when I insert it in to the appropriate RegEdit location e.g. :

  Windows Registry Editor Version 5.00
  
  
  
  [HKEY_CLASSES_ROOT\Applications\foobar2000.exe\shell\mp3\command]
  
  @="\"C:\\Program Files (x86)\\ffmpeg\\ffmpeg.exe\" -i \"%1\" -write_xing 0 -ac 2 -ar 24000 -ab 48k -id3v2_version 3 -write_id3v1 1 \"%1\".mp3 && DEL /Q \"%1\" "

  while it worked fine before I added the trailing && clause. You run it by a right click context menu item.

  Is there any way to achieve this preferably without creating additional BAT/CMD files. I tried placing ( ) brackets around the entire line but then it seemed to change scope and no longer find the input file.