Forum Post

Marteau (Ground Zero Pro Audio) asked a question.

Atmos .mp4 export / higher resolution video
Hello. Happy New Year! Of course the Dolby Atmos Renderer allows us to export an MP4 file with video at a 720p resolution. Once this file is exported ... is it possible to replace the video with a higher resolution format? ex: 3840 x 2160 WITHOUT losing the encoded Atmos Audio data. Any tool to do this? Many Thanks!

    • TiKkO (Deadly Mix Studios)

      I had some time and decided to make this little studio promo video in Premier Pro and thought it would be neat to use it as the video for this client's Dolby Atmos music master QC check MP4 file. When video clients send me their stuff, it works. Me making this h264 MP4 file though, no such luck.

      I matched the time... It says they don't match but that it'll just crop or whatever to make it fit. I say "Okay" and then I get a Runtime error when its done rendering. I made sure the video was 24fps, like the audio project. I even rendered it to 448kbps 48kHz to match everything as well as I could and nothing is working. The video was filmed in 8K. That's all I can think of that could be the cause. Then again there are so many options to rendering that I might have something wrong I don't know about. Dolby's FAQ is always awful. They say it just has to be H264 with the fps matched basically but there's obviously more to it that I just don't know because I'm an audio engineer, not a video guy
      Expand Post
      • BennettS (Dolby Labs)

        Can you please send over the log files from the Renderer (Help > Open logs folder) as a zip file? There may be something else going on here, and looking at the logs will help.

        -B
      • TiKkO (Deadly Mix Studios)

        I was able to get it on ny next attempt. I had to choose a lower video quality in the render. It seems 8K was too high for DAR. 720p did the trick.
  • Marteau (Ground Zero Pro Audio)

    Thanks again Bennet! I did not understand clearly that the "Custom" video could include higher resolutions than 720p ... Doohhh. Obviously creating such an MP4 file with the video elementary stream encoded as h.264 is easy as pie :-) .... Tested today / works a charm! All the best mate! Joe