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• Getting ffmpeg to work on a nodejs server: Error: ffmpeg exited with code 1: Output #0, wav, to 'output.wav'

  14 May 2023, by Djaenike

  I need to convert an m4a buffer stream to a wav buffer stream. I'm trying to accomplish this through ffmpeg-static and fluent-ffmpeg on a nodejs backend. I'm using multer to process the buffer stream coming from the client, then pass it through a convertM4AToWAV, which

  


  Here is the code I'm using to establish ffmpeg and convert the buffer stream.

  


  const ffmpeg = require('fluent-ffmpeg');
const ffmpegStatic = require('ffmpeg-static');
ffmpeg.setFfmpegPath(ffmpegStatic);

...more code here for the api route...

const convertM4AToWAV = async (m4aBuffer) => {
  console.log(`buffer in: ${m4aBuffer}`);
  try {
    const wavBuffer = await ffmpeg(m4aBuffer)
      .toFormat('wav')
      .on('start', (command) => console.log('FFmpeg command:', command))
      .on('end', () => {
        console.log('Conversion complete.');
      })
      .save('output.wav');
    return wavBuffer;
  } catch (error) {
    console.error('Error converting audio buffer stream to wav:', error);
    throw error;
  }
};


  


  And here is the error message I'm seeing:

  


  //I can see the buffer come in
buffer in: ↑ftyp3gp4isom3gp4☺mdat????????.....
//I can see the command
FFmpeg command: ffmpeg -y -f wav output.wav
//Error message thrown
Error transcribing audio: Error: 13 INTERNAL: Request message serialization failure: invalid encoding
    at callErrorFromStatus
...file directory jibberish...
code: 13,
  details: 'Request message serialization failure: invalid encoding',
  metadata: Metadata { internalRepr: Map(0) {}, options: {} },
  note: 'Exception occurred in retry method that was not classified as transient'
}
error - uncaughtException: Error: ffmpeg exited with code 1: Output #0, wav, to 'output.wav':
Output file #0 does not contain any stream


  


  Any thoughts why this error is thrown? My gut is telling me it's because I haven't configured ffmpeg correctly on the server.

  


• imagemagick pipe to ffmpeg

  16 July 2024, by user26389289

  I'm trying to write a batch file for a friend to make timelapse videos. I'm using avisynth, but she's even more clueless than I, so I tried to do most of the work with ffmpeg.
What I'd like to do is to pipe imagemagick output (a filtered sequence of jpeg images) to ffmpeg and create a video.
I've thrown out everything out of the batch file, and more or less here i am:

  


  magick jpg:- d:\54tldir\src\*.jpg | ffmpeg.exe -f image2pipe -i pipe: -c:v libx264 02video.mp4


  


  I'm sure I've missed 1 or a few or many things.
all help would be appreciated - on my level (very low).

  


• ffmpeg-how to add text to video without encoding [on hold]

  27 December 2013, by user3139491

  I want to add text to video without encoding.how to do this.
  I create this code

  ffmpeg -i file.mov -vf drawtext="fontfile=/usr/share/fonts/truetype/ttf-dejavu/DejaVuSerif.ttf:text='Text to write':fontsize=20:fontcolor=black:x=100:y=100" final.mov

  this code word well but the cpu hit the peak.
  so only want to do this without encoding.
  is -vcodec copy map can be used????