Add Spatial Audio to a Video For YouTube

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Spatial audio is supported by YouTube on multiple platforms (see link for details). The Facebook 360 Encoder is able to export videos in a YouTube supported format. Note: in some cases YouTube can take time to enable spatial audio after upload.

Installation (macOS)

  1. Download the Spatial Workstation installer from here.
  2. Once downloaded, unzip FB360_SpatialWorkstation_OSX.zip and run SpatialWorkstation_x.x.x_OSX.mpkg, where x.x.x would be the current version number. Ensure you are using v1.3 or greater
  3. Follow the prompts on your screen to complete the installation

Installation (Windows)

  1. The Encoder requires Mp4Box and Python 2.7 installed on your Windows computer
    1. The Python 2.7 installer can be downloaded from here. Follow the instructions with the installer.
    2. Mp4Box can be installed using the GPAC installer from here. The GPAC installer includes Mp4Box and other components. Installing the additional components is optional
  2. Download the Spatial Workstation installer for Windows from here (choose Spatial Workstation - Windows from the dropdown menu)
  3. Unzip FB360_SpatialWorkstation_WIN_x.x.x.zip and run SpatialWorkstation-x.x.x-Win64
  4. Follow the prompts on your screen to complete the installation

Encoding For YouTube

  1. Once installed, the Encoder application can be found in
    1. Mac HD/Applications/FB360 Spatial Workstation/Encoder on macOS
    2. By default: C:\Program Files\FB360 Spatial Workstation\Encoder on Windows
  2. Open FB360 Encoder. The screenshots below are applicable to both macOS and Windows. 
  3. For uploads to YouTube, ensure that OUTPUT FORMAT is set to YouTube Video (with 1st order ambiX)
  4. Drop or load the multichannel spatial audio wav file. This is the audio that will rotate and respond when looking around a 360 video. The wav file can be of any sample rate, but is ultimately converted to 48000 samples per second.
  5. Ensure you specify the spatial audio format. It can be one of these two:
    1. Spatial Workstation 8 Channel: If you have used the Spatial Workstation to design your audio mix, this would be the output of the 3D master from your audio session. This will be converted to first order ambiX, at a loss of quality.
    2. B-format ambiX: First order ambisonics with ACN ordering and SN3D normalization
  6. Ensure the From Pro Tools checkbox is ticked if the 8 channel spatial audio file is from Pro Tools
  7. Drop or load the video file. Ensure that the video is encoded as H.264 within an mp4 container
  8. Set the layout for the video file:
    1. Monoscopic: A monoscopic video, where the same frame will be displayed to both eyes when viewing in 3D
    2. Left-Right Stereoscopic: A stereoscopic video, where the left half of the video will be displayed to the left eye and the right half of the video will be displayed to the right eye when viewing in 3D
    3. Top-Bottom Stereoscopic: A stereoscopic video, where the top half of the video will be displayed to the left eye and the bottom half of the video will be displayed to the right eye when viewing in 3D
  9. Click the Encode button and save your file
  10. Upload the encoded file to YouTube. It may take some time for YouTube to process the spatial audio.

 

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