Dolby TrueHD cause transcode?

[nodiaque 62]

Hello,

I'm unsure if it's only since latest version but I notice while diagnosing another problem that when I play Dolby TrueHD, regardless if it's 2.0, 5.1 or 7.1, it cause transcoding directly. I'm pretty sure it wasn't always the case.

I tried multiple file with different truehd and they all start an audio transcoding.

 

Thank you

embyserver (1).txt

[SamES 1056]

Yes, TrueHD will always cause audio conversion as it is not supported by the TV. Do you have the ffmpeg logs?

[nodiaque 62]

I have another one

ffmpeg-remux-49630d20-b7a6-4071-8417-89e49dcada8e_1.txt

[SamES 1056]

34 minutes ago, nodiaque said:

I have another one

ffmpeg-remux-49630d20-b7a6-4071-8417-89e49dcada8e_1.txt 22.21 kB · 0 downloads

Yep, same problem.  It's only converting the audio, so it should be a quick/lightweight conversion, but it's again TrueHD not being supported:

22:03:47.677   Stream #0:0 -> #0:0 (copy)
22:03:47.677   Stream #0:1 -> #0:1 (truehd (native) -> aac (native))

 

[nodiaque 62]

weird, I'm sure I played dolby truehd in the past. Oh well

[nodiaque 62]

I just saw one of my external user playing dolby truehd 7.1 without transcoding

 

I asked her how she's playing cause it's 4k DV with TrueHD 7.1 without any transcoding. She told me it's an LG

embyserver.txt

 

Edit: OK, nevermind. She just told me she use a Google Chromecast to play it. I'll have to try because if a google chromecast (or the new, google tv I think?) can play DTS-HD MA 7.1 Atmos, TrueHD 7.1 Atmos, HDR and Dolby Vision, this would be the greatest addition.

edit 2: so a little more digging found out that Google Chromecast and Google TV doesn't support truehd and not even DTS. What happen is they accept it, decode it and send it in PCM to the speaker. Wow.... I'm reading maybe firestick 4k Max could

Edited August 6, 2025 by nodiaque

[yocker 1247]

5 hours ago, nodiaque said:

I just saw one of my external user playing dolby truehd 7.1 without transcoding

 

I asked her how she's playing cause it's 4k DV with TrueHD 7.1 without any transcoding. She told me it's an LG

embyserver.txt 5.03 MB · 0 downloads

 

Edit: OK, nevermind. She just told me she use a Google Chromecast to play it. I'll have to try because if a google chromecast (or the new, google tv I think?) can play DTS-HD MA 7.1 Atmos, TrueHD 7.1 Atmos, HDR and Dolby Vision, this would be the greatest addition.

edit 2: so a little more digging found out that Google Chromecast and Google TV doesn't support truehd and not even DTS. What happen is they accept it, decode it and send it in PCM to the speaker. Wow.... I'm reading maybe firestick 4k Max could

Getting DTS-MA and TrueHD without transcoding can be a bit tricky and expensive. You need a player that can passthrough the signal to a receiver that can decode the signal.
I don't know of any TV that can decode the signal or even pass it through.

I use a Nvidia shield and a surround receiver to be able to listen to DTS-MA and TrueHD.

[nodiaque 62]

Yeah dts HD ma work on my tv but not true hd. I though it was the case from my friend tv but I learned with that post why it's not the case. 

 

I'll probably just run my pc and use it since it can run anything. Still have to test properly my setup but I know I can get it to work. 

[yocker 1247]

10 hours ago, nodiaque said:

Yeah dts HD ma work on my tv but not true hd. I though it was the case from my friend tv but I learned with that post why it's not the case. 

 

I'll probably just run my pc and use it since it can run anything. Still have to test properly my setup but I know I can get it to work. 

Just remember that if you want Dolby Vision on a PC (running Windows) that it might be a pain also.
Should be durable somehow though.

[nodiaque 62]

What do you mean?