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• How to debug ffmpeg-static in a AWS Lambda layer

  31 mars 2021, par boblapointe

  I have an AWS Lambda layer containing nodejs ffmpeg-static. Calling "ffmpeg.path" will return the correct location of the ffmpeg executable in the layer.

  



  But any call to ffmpeg will stop silently, making it impossible for me to know what caused the error. Here is my test function :

  



  const exec = require( "child_process" ).exec
const ffmpeg = require( "ffmpeg-static" )
exports.handler = async (event, context, callback ) => {
    console.log( ffmpeg.path ) // Outputs: "/opt/nodejs/node_modules/ffmpeg-static/bin/linux/x64/ffmpeg"
    exec( ffmpeg.path + " -version",
        function( error, stdout, stderr ) {
            console.log( stdout ) // Nothing
            console.log( stderr ) // Nothing
            if ( error ) {
                console.log( error ) // Nothing
            }
        }
    )


  



  The exec() callback is never triggered. How can I identify the problem ?

  


• Unable to parse option value xxx.srt as image size Error applying option 'original_size' to filter 'subtitles' : Invalid argument

  6 décembre 2023, par gabri yañez vallverdu

  const strFile = `http://localhost:8080/public/srtFiles/nombreArchivo.srt`
    
const localSubtitleFilePath = path.join(__dirname, 'nombreArchivo.srt');

 axios.get(strFile, { responseType: 'arraybuffer' })
    .then(response => {
        fs.writeFileSync(localSubtitleFilePath, Buffer.from(response.data));

        const outputFilePath = path.join(__dirname, '../../../public/videosSubtitled', `${videoName}`);
        console.log('Subtitle File Path:', localSubtitleFilePath);
        console.log('Output File Path:', outputFilePath);

        exec(`ffmpeg -i ${tempFilePath} -vf subtitles=${localSubtitleFilePath} ${outputFilePath}`, function(error, stdout, stderr) {
            if (error) {
                console.log(error);
                console.log(stdout);
                console.log(stderr);
                console.log("❌  Something went wrong!");
                res.status(500).json({ success: false, message: 'Error al crear el video subtitulado' });
            } else {
                fs.unlinkSync(tempFilePath);
                fs.unlinkSync(localSubtitleFilePath);
                console.log("Done! 🍿 😎");
            }
        });
    })
    .catch(error => {
        console.log("Error downloading subtitle file:", error);
        res.status(500).json({ success: false, message: 'Error al descargar el archivo de subtítulos' });
    });


  


  Hi, I'm trying to add subtitles to a video with ffmpeg in a NodeJS app, but I have this error :
[Parsed_subtitles_0 @ 0000024140111580] Unable to parse option value xxx.srt as image size Error applying option 'original_size' to filter 'subtitles' : Invalid argument

  


  I have tried to send the srt file by a public url and by a local file, but I have also a mistake.

  


• Ffmpeg returning error code 1 in AWS Lamda function

  14 avril 2018, par Tometoyou

  I’m running a lambda function which takes an mp4 video, and adds a watermark of a png image over the top of it in the bottom right hand corner (with a 10px margin). It then outputs that image to a temporary location. It keeps failing with Error code 1, but that isn’t very helpful. I’m using a binary version of ffmpeg that is specified in the main directory of the code. I know that ffmpeg is set up correctly due to using it in another lambda function in this way, which works. But adding an overlay fails. Here is the relevant part of my code :

  function addWatermark(next) {
  
      var ffmpeg = child_process.spawn("ffmpeg", [
  
        "-i", target, // url to stream from
  
        "-i", watermarkPath,
  
        "-filter_complex" ,"overlay=x=W-w-10:y=H-h-10:format=rgb,format=yuv420p",
  
        "-c:a", "copy",
  
        "pipe:1"
  
      ]);
  
      ffmpeg.on("error", function(err) {
  
        console.log(err);
  
      })
  
      ffmpeg.on("close", function(code) {
  
        if (code != 0 ) {
  
          console.log("child process exited with code " + code); // Always exits here.
  
        } else {
  
          console.log("Processing finished !");
  
        }
  
        tmpFile.end(); 
  
        next(code);
  
      });
  
      tmpFile.on("error", function(err) {
  
        console.log("stream err: ", err);
  
      });
  
      ffmpeg.on("end", function() {
  
        tmpFile.end();  
  
      })
  
      ffmpeg.stdout.pipe(tmpFile)
  
      .on("error", function(err){
  
        console.log("error while writing: ",err);
  
      });
  
  }

  Can anyone spot what may be wrong ?

  UPDATE

  I’ve managed to print out some more logs, I’m getting the error :

  [NULL @ 0x42923e0] Unable to find a suitable output format for 'pipe:1'