Extracting DD+/E-AC3 + Atmos from TrueHD + Atmos

[clidx]

Is this possible without expensive Dolby software? I have read reports of some receivers outputting DD+ Atmos when given a TrueHD Atmos track. The eac3to wiki also has an example of DD+ extraction but when I tried it, it started to transcode which suggests to me that TrueHD either doesn't always have a DD+ core or the Atmos metadata is tripping it up.

[SeeMoreDigital]

Hi and welcome to the forum

Is this possible without expensive Dolby software? I have read reports of some receivers outputting DD+ Atmos when given a TrueHD Atmos track. Really... Which AVR's can do this?

The eac3to wiki also has an example of DD+ extraction but when I tried it, it started to transcode which suggests to me that TrueHD either doesn't always have a DD+ core or the Atmos metadata is tripping it up.Dolby TrueHD audio streams do not include a DD+ (eac3) core. They have an ac3 core ;)

[clidx]

Hi and welcome to the forum

Really... Which AVR's can do this?

Dolby TrueHD audio streams do not include a DD+ (eac3) core. They have an ac3 core ;)

I didn't keep links but found this report again. https://emby.media/community/index.php?/topic/82812-transcode-truehd-atmos-to-dd-atmos/&do=findComment&comment=947524

Guess I will just have to put up with 5Mb audio tracks for now!

[tormento]

Is this possible without expensive Dolby software?
ffmpeg.exe -i [eng].thd -acodec eac3 -ab 640k [eng].eac3

[clidx]

ffmpeg.exe -i [eng].thd -acodec eac3 -ab 640k [eng].eac3

Surely ffmpeg's encoder discards Atmos?

[tormento]

Surely ffmpeg's encoder discards Atmos?


There is no way to keep it without expensive software AFAIK.