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• Download,modify and upload video with S3

  9 février 2017, par Gold Fish

  I’m trying to write a Lambda function in nodejs that will download a file from S3 bucket, modify it, and then upload it back to another S3 bucket. For some reason, the algorithm prints the ’Modify Video’ log and then finishes and exit without error. What am I doing wrong ?

  var AWS = require('aws-sdk');
  
  var util = require('util');
  
  var ffmpeg = require('fluent-ffmpeg');
  
  var s3 = require('s3');
  
  
  
  // get reference to S3 client
  
  
  
  var awsS3Client = new AWS.S3();
  
  var options = {
  
    s3Client: awsS3Client,
  
  };
  
  var client = s3.createClient(options);
  
  
  
  exports.handler = function(event, context, callback) {
  
      // Read options from the event.
  
      console.log("Reading options from event:\n", util.inspect(event, {depth: 5}));
  
      var srcBucket = event.Records[0].s3.bucket.name;
  
      // Object key may have spaces or unicode non-ASCII characters.
  
      var srcKey    =
  
      decodeURIComponent(event.Records[0].s3.object.key.replace(/\+/g, " "));
  
      var dstBucket = srcBucket + "-dst";
  
      var dstKey    = "mod_" + srcKey;
  
  
  
      var dwnld_file_name = '/tmp/vid.mp4';
  
      var mdfy_file_name = '/tmp/mod_vid.mp4';
  
  
  
      // Sanity check: validate that source and destination are different buckets.
  
      if (srcBucket == dstBucket) {
  
          callback("Source and destination buckets are the same.");
  
          return;
  
      }
  
  
  
      // Infer the video type.
  
      var typeMatch = srcKey.match(/\.([^.]*)$/);
  
      if (!typeMatch) {
  
          callback("Could not determine the video type.");
  
          return;
  
      }
  
      var videoType = typeMatch[1];
  
      if (videoType != "mp4") {
  
          callback('Unsupported video type: ${videoType}');
  
          return;
  
      }
  
      console.log("Source bucket: ", srcBucket);
  
      console.log("srcKey: ", srcKey);
  
      console.log("Dest bucket: ", dstBucket);
  
      console.log("dstKey: ", dstKey);
  
  
  
      var params = {
  
        localFile: dwnld_file_name,
  
  
  
        s3Params: {
  
          Bucket: srcBucket,
  
          Key: srcKey,
  
        },
  
      };
  
      console.log("params for download: ", params);
  
      var downloader = client.downloadFile(params);
  
      downloader.on('error', function(err) {
  
        console.error("unable to download:", err.stack);
  
        callback("unable to download");
  
      });
  
      downloader.on('end', function() {
  
        console.log("done downloading");
  
        console.log("modify video");
  
        ffmpeg(dwnld_file_name)
  
            .setStartTime('00:00:01')
  
            .setDuration('1').output(mdfy_file_name).on('end', function() {
  
              console.log('Finished processing');
  
              params = {
  
                localFile: mdfy_file_name,
  
                //localFile: dwnld_file_name,
  
                s3Params: {
  
                  Bucket: dstBucket,
  
                  Key: dstKey,
  
                },
  
              };
  
              console.log("params for upload: ", params);
  
              var uploader = client.uploadFile(params);
  
              uploader.on('error', function(err) {
  
                console.error("unable to upload:", err.stack);
  
                callback("unable to upload");
  
              });
  
              uploader.on('end', function() {
  
                console.log("done uploading");
  
                callback('done');
  
                return;
  
              });
  
          });  //
  
      });
  
  };

• I want to save a video with effects applied on it

  10 novembre 2016, par shriya

  java.lang.NullPointerException: Attempt to invoke virtual method 'void com.github.hiteshsondhi88.libffmpeg.FFmpeg.execute(java.lang.String[], com.github.hiteshsondhi88.libffmpeg.FFmpegExecuteResponseHandler)' on a null object reference

  This is command string which i want to process.

  commandStr = "ffmpeg -y -i " + old_video_path +" -strict experimental -vf curves=vintage -s 240x320 -r 30 -aspect " +"4:3 -ab 48000 -ac 2 -ar 22050 -b 2097k -vcodec mpeg4 -preset ultrafast "+ path + "/WeRgold_" + "NAME" + ".mp4";

• I want to make a box completely unrecognizable in a video without any way of reconstructing its content

  26 janvier 2023, par Jenson vivish

  saw many videos but couldn't find how to create

  


  I want to make a box completely unrecognizable in a video without any way of reconstructing its content. Is

  


  ffmpeg -y -i input_video -vf "drawbox=x=10:y=10:w=100:h=100:color=black@1.0:t=fill" ouput_video
sufficient for that ?

  


  The command creates a black box at the desired location. I am just not sure if this cannot be undone.