Not with the Mastering Suite mp4 export function.   


There are a few ways to go about this.   Dolby has provided open source command line tools on Github that will let you demux the mp4, extract the .3c3 file and remux with your own video file.   Links to these tools and a guide are below.  


Alternatively AWS MediaConvert and AWS S3 storage can be utilized to create an MP4 or package and publish the content as HLS which can be streamed directly from S3 storage or other platforms to various playback devices include the Apple TV 4k via Airplay.   The MP4 from the Renderer can be used as the audio source with AWS MediaConvert.  Media Convert can also encode the video directly from QT or MXF without an intermediate step with an NLE as described below.

 

The mp4 demuxer can be found:

https://github.com/DolbyLaboratories/dlb_mp4demux

 

The mp4 muxer can be found:

https://github.com/DolbyLaboratories/dlb_mp4base


Guide:


1. To download,  click on Clone or Download and download the .zip file as pictured below for both the muxer and demuxer





2. Unzip the files to reveal a folder structure as pictured below.   The "bin" folder contains the compiled tools.   These are run from the cmd prompt in windows or terminal in mac or linux.   The windows executable have a .exe extension and the mac versions have _mac in the file name.


3. Whether using terminal or cmd prompt the correct paths to the muxer and demuxer and media are required.  


If you are unfamiliar with using the command line it is suggested to open terminal from the bin folder (mac) or navigate to this folder with cmd prompt.   It is also easier to copy or move the media to the bin folders directly with finder or windows explorer to avoid complex paths.   On a mac start by first enabling  "new terminal at folder" from system preferences/keyboard as pictured below.


4. Control click on the dlb_mp4demux-master bin folder to open a new terminal at folder as pictured below.



5. Once you have copied or moved the mp4 file exported from the Renderer to the dlb_mp4demux-master/bin folder, run the following command in terminal to demux the encoded .ec3 file as pictured below.  

 

./mp4demuxer_mac --input-file NaturesFury.mp4 --output-folder tmp



6. You will see the .ec3 file in the tmp directory as "out_2.ec3".   To avoid any confusion delete the .h264 file and rename the .ec3  file and move to the dlb_mp4base-master/bin folder as pictured in the two images below.






7. The mp4muxer requires a video elementary stream encoded as h264 or h265.   These can be encoded from a Pro Res Quicktime or MXF using various software packages.   Most often this is done from an NLE such as Adobe Premier, Apple Final Cut Pro, Avid Media Composer or Black Magic Design Resolve. Resolve is free to use.   


Once the source video is imported into one of these applications and dragged to a timeline, it can be exported as an mp4 and then demuxed as in steps 4 and 5 above to provide access to the .h264 elementary video file.   


The "delivery" export window from Resolve is pictured below.   Note that only video is required.   If audio from the video source is included it can be discarded after the mp4 demux.   In this example the mp4 is exported directly to the mp4demux-master/bin folder.




8. Once the mp4 exported from your NLE is demuxed as pictured in step 4, you will see the .h264 file in the tmp directly as out_1.h264.   To avoid any confusion rename this file and move to the dlb_mp4base_master/bin folder as pictured in step 6.


9. With the .ec3 and .h264 now in the dlb_mp4base_master/bin folder, control click the dlb_mp4base-master/bin folder to open a new terminal at folder as pictured below.



10. Run the following command in terminal as pictured below to mux the Atmos .ec3  compressed video elementary stream and output as an appropriately named  .mp4 file.


./mp4muxer_mac -i NaturesFury.ec3 -i NaturesFury.h264 -o NaturesFurywithAtmosandVideo.mp4


Note that mp4 from some applications do not write the framerate to the elementary stream.  If this happens the mp4muxer will default to 30fps.   You can check that the video frame is in the .h264 elementary stream with MediaInfo.   If this is not present or the duration is not as expected insert  --input-video-frame-rate <framerate> into the command string above.



11.  You can verify the .mp4 file with the MediaInfo application as pictured below.   Quicktime Player will also play the file.  However, the Inspector window of the Quicktime Player will only indicate Dolby Digital Plus 5.1 and not give an indication that file is Atmos.





12.  The .mp4 file with Atmos encoded as Dolby Digital Plus and h264 encoded video can be loaded onto a USB drive and played back through a Blu-Ray player (audio must be set to bitstream out) to an Atmos enabled AVR, Soundbar or Atmos enabled TV.   On some TVs the  USB drive can be attached directly and HDMI ARC (audio return channel) used to connect to the Atmos enabled AVR or soundbar.    


Note that not all Blu-Ray players with USB inputs can read NTFS or Ex Fat which is required to for files larger than 4GB.    Check the specs on your player.


MP4 with Atmos content can also be played from an AppleTV 4k using a Plex Media Server (local or remote using shared folders) and the Plex app on the Apple TV 4k.   Playback from a remote Plex Media Server is dependent on the datarate of encoded video and upload speeds.   Content packaged as HLS with AWS MediaConvert and hosted on AWS S3 storage can be played from an iphone/pad/Mac browser and "sent" to an Apple TV 4k using Airplay.