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• FFMPEG is not working in AWS lambda function

  13 novembre 2022, par Arun

  I am trying to convert a video file into an audio file using AWS lambda function whenever a file is uploaded into an S3 bucket. So I am using FFMPEG for converting a video file into audio. But I keep getting this error while converting a video file. I have seen similar questions but none of the solutions is not working for me. So If anyone knows please share your solutions.

  



  Error message

  



      TypeError: Cannot create property 'stack' on string 
'Could not find ffmpeg executable, tried "/var/task/node_modules/@ffmpeg-installer/linux-x64/ffmpeg" and "/var/task/node_modules/@ffmpeg-installer/ffmpeg/node_modules/@ffmpeg-installer/linux-x64/ffmpeg"'


  



  Code

  



      const
    ffmpegPath = require("@ffmpeg-installer/ffmpeg").path,
    ffmpeg = require("fluent-ffmpeg");

    // set ffmpeg package path
    ffmpeg.setFfmpegPath(ffmpegPath);
    function convert(input, output, callback) {
        ffmpeg(input)
            .output(output)
            .on('end', function() {                    
                console.log('conversion ended');
                callback(null);
            }).on('error', function(err){
                console.log('error: ', err.code, err.msg);
                callback(err);
            }).run();
    }

    exports.handler = function (event, context, callback) {
        const key = decodeURIComponent(event.Records[0].s3.object.key.replace(/\+/g, ' '));
        console.log("key ", key);
        console.log("event ", event.Records[0].s3);
        convert(key, `/tmp/${key}.mp3`, function(err){
            if(!err) {
                console.log('conversion complete');
            } else {
                console.log('Error');
            }
        });
    }


    const
        ffmpegPath = require("@ffmpeg-installer/ffmpeg").path,
        ffmpeg = require("fluent-ffmpeg");

    // set ffmpeg package path
    ffmpeg.setFfmpegPath(ffmpegPath);
    function convert(input, output, callback) {
        ffmpeg(input)
            .output(output)
            .on('end', function() {                    
                console.log('conversion ended');
                callback(null);
            }).on('error', function(err){
                console.log('error: ', err.code, err.msg);
                callback(err);
            }).run();
    }

    exports.handler = function (event, context, callback) {
        const key = decodeURIComponent(event.Records[0].s3.object.key.replace(/\+/g, ' '));
        console.log("key ", key);
        console.log("event ", event.Records[0].s3);
        convert(key, `/tmp/${key}.mp3`, function(err){
            if(!err) {
                console.log('conversion complete');
            } else {
                console.log('Error');
            }
        });
    }


  



  package.json

  



      "dependencies": {
    "@ffmpeg-installer/ffmpeg": "^1.0.17",
    "fluent-ffmpeg": "^2.1.2",
    "fs": "0.0.1-security"
  }


  


• HTML5 live streaming with alpha channel

  5 mars 2021, par air5

  We are trying to live stream a video file with alpha channel. Adaptive streaming would be great, but it's not a must. Streaming is pretty new territory for us.

  


  We found out that WebM (VP9) seems to be the only format in the web that supports alpha channel. We tried using the nginx-rtmp-module as streaming server (MPEG-DASH) and broadcast the file with ffmpeg. But the alpha channel was lost. Probably because RTMP required us to broadcast the video as a FLV which doesn't support alpha.

  


  Is anyone having experience in streaming rgba videos on the web ? Getting to know compatible commercial solutions would be interesting tee. My next approaches would be trying to use Icecast. There is not much information online but this article where streaming a webm directly seems to be possible.

  


• FFmpeg merge image with video looses quality

  19 août 2016, par John Doe 2

  I am merging an image with a video, my command looks like this :

  ffmpeg -i background.mpg -i Menu.png -filter_complex "[0:v][1:v] overlay=25:25:enable='between(t,0,30)'" -pix_fmt yuv420p -c:a copy merge1.mpg

  That works, but something strange happens.

  If I run that merged video it continuously looses quality at each second, at the first few seconds the quality is ok but later on it looses quality(the resolution becomes worse).

  Any ideas of how this is happening and maybe solutions ?

  Edit

  I get this strange message in my console :

  [mpeg @04ee9960] VBV buffer size not set, using default size of 130KB
  If you want the mpeg file to be compliant to some specification Like
  DVD, VCD or others, make sure you set the correct buffer size