Chime SDK concatenation pipeline

[Boanerges1996]

I have been using chime sdk for a while now specifically meetings and pipeline api. My question is how do I get both video and audio to be mixed into a single stream when I call createMediaConcatenationPipeline. The output I get is concatenated video in a separate folder and audio also in a separate folder. I want to be able to get a stream which is a mix of both audio and video. Currently I am using ffmpeg to handle the mixing of audio and video and afterwards uploading it to s3.
Currently this is how my createMediaPipeline config looks like

{
  SinkType: 'S3Bucket',
  SinkArn: prepareSinkArn(),
  SourceType: 'ChimeSdkMeeting',
  SourceArn: prepareSourceArn(mediaSessionId),
  ChimeSdkMeetingConfiguration: {
    ArtifactsConfiguration: {
      Video: {
        State: 'Enabled',
        MuxType: 'VideoOnly',
      },
      Audio: {
        MuxType: 'AudioWithCompositedVideo',
      },
      Content: {
        State: 'Enabled',
        MuxType: 'ContentOnly',
      },
    },
  },
}

And my concat pipeline config looks like this

{
  Sources: [
    {
      Type: 'MediaCapturePipeline',

      MediaCapturePipelineSourceConfiguration: {
        MediaPipelineArn: mediaPipelineArn,
        ChimeSdkMeetingConfiguration: {
          ArtifactsConfiguration: {
            Audio: {
              State: 'Enabled',
            },
            Video: {
              State: 'Enabled',
            },
            Content: {
              State: 'Enabled',
            },
            DataChannel: {
              State: 'Enabled',
            },
            TranscriptionMessages: {
              State: 'Enabled',
            },
            MeetingEvents: {
              State: 'Enabled',
            },
            CompositedVideo: {
              State: 'Enabled',
            },
          },
        },
      },
    },
  ],
  Sinks: [
    {
      Type: 'S3Bucket',
      S3BucketSinkConfiguration: {
        Destination: `arn:aws:s3:::${process.env.S3_BUCKET_CHIME_RECORDINGS}`,
      },
    },
  ],
}