RBox Pro unable to passthrough Dolby True HD 7.1 audio streams

[King Kong]

I'm new and the search function doesn't seem to work for me--or i just do not know how to use it properly.

I have an RBox Pro that was gifted to me and I was trying to see if it would passthrough a few audio streams with ATMOS and I couldn't get it to work. I'm running Kodi Kryton 17.6.
I tested some ATMOS test files from Dolby and my Denon AVR S920W recognizes the ATMOS stream on those files except for my movie files.

audio is set as pass through on Kodi along with AC3, DTS, etc. What is the issue? is it a firmware issue with this box? What can I do to make HD passthrough work properly?

I check the media info for the dolby atmos test file and the movie rips attached below.

My AVR does not recognize the first audio stream
and the second audio stream is the received to the AVR as PCM 2 channel.



Audio
ID : 2
Format : E-AC-3
Format/Info : Enhanced Audio Coding 3
Format profile : E-AC-3+Atmos / E-AC-3
Codec ID : ec-3
Duration : 1 min 3 s
Bit rate mode : Constant
Bit rate : 448 kb/s
Channel(s) : 15 objects / 6 channels
Channel positions : 15 objects / Front: L C R, Side: L R, LFE
Sampling rate : 48.0 kHz
Frame rate : 187.500 FPS (256 SPF)
Bit depth : 16 bits
Compression mode : Lossy
Stream size : 3.39 MiB (5%)
Service kind : Complete Main
Default : Yes
Alternate group : 2
Encoded date : UTC 2018-05-03 17:08:46
Tagged date : UTC 2018-05-03 17:08:46


The Movie rips I was testing:

Audio #1
ID : 2
Format : DTS
Format/Info : Digital Theater Systems
Format profile : MA / Core
Codec ID : A_DTS
Duration : 1 h 47 min
Bit rate mode : Variable / Constant
Bit rate : Unknown / 1 509 kb/s
Channel(s) : 8 channels / 6 channels
Channel positions : Front: L C R, Side: L R, Back: L R, LFE / Front: L C R, Side: L R, LFE
Sampling rate : 48.0 kHz
Frame rate : 93.750 FPS (512 SPF)
Bit depth : 24 bits
Compression mode : Lossless / Lossy
Language : English
Default : Yes
Forced : No

Audio #2
ID : 3
Format : TrueHD
Format profile : TrueHD+Atmos / TrueHD
Codec ID : A_TRUEHD
Bit rate mode : Variable
Maximum bit rate : 6 759 kb/s
Channel(s) : Object Based / 8 channels
Channel positions : Object Based / Front: L C R, Side: L R, Back: L R, LFE
Sampling rate : / 48.0 kHz
Frame rate : 1 200.000 FPS (40 SPF)
Compression mode : Lossless
Language : English
Default : No
Forced : No

[clarkss12]

Give this version of LibreELEC a try on your box and see how that works. You install it on a microSD card, so you can dual boot between it and Android.

https://forum.libreelec.tv/thread/12325-8-2-4-1-libreelec-kodi-krypton-s905-s912-devices/

[King Kong]

I can't tell if my SD card is corrupt since I do not see anything on the card after I loaded. When I go try to get to reload the file, it says there's less than 512 mb on the drive? This is a 32gb card.

[clarkss12]

I can't tell if my SD card is corrupt since I do not see anything on the card after I loaded. When I go try to get to reload the file, it says there's less than 512 mb on the drive? This is a 32gb card.

That is a common problem with the cards if you have already run different OS's on it. Anyway, if you are using Windows, go into the "Computer Management" app and go to "Disk Management". You should "see" your SD card. Delete all the partitions and create a new "simple volume". Just make sure you do it to your SD card and NOT one of your hard drives. That will give you back your 32gb and then you can format it.

What app did you burn you firmware to the microSD card?? Rufus or Etcher. Best to use Rufus.

Also, after you "burn" the OS onto the SD card, you HAVE to remove it from the computer then re-insert it, or your computer will NOT see the files on the card. So, you MUST remove and re-insert the card after you create your now OS.

[King Kong]

What app did you burn you firmware to the microSD card?? Rufus or Etcher. Best to use Rufus.

Also, after you "burn" the OS onto the SD card, you HAVE to remove it from the computer then re-insert it, or your computer will NOT see the files on the card. So, you MUST remove and re-insert the card after you create your now OS.

I used the Libre USB-SD creator for windows.

edit: So I found and downloaded Rufus. In goes and takes off loading the file but then stops and creeps once it hits like 99.6%. Then goes to 100%. Complete and I get a prompt saying write failed. Any ideas?

[King Kong]

Had Rufus do a check on the SD card and comes out to have 256 bad blocks... new card too.

[clarkss12]

Had Rufus do a check on the SD card and comes out to have 256 bad blocks... new card too.

I have never had that problem.. If you have a 4 gig or more USB pen drive, give that a try, although I don't recall doing it myself.

Edit: there are a ton of counterfeit microSD cards out there. Not sure where you can purchase a card that is guaranteed to NOT be a counterfeit.

[King Kong]

Managed to reformat it again and I'm having Rufus do a bad blocks check again. It's just taking a loooong time to check.

Once all is well, how do I go about getting Libre to run off the micro SD?

I'm assuming this:
power down box,
insert micro sd card in slot on box
hold reset button down with toothpick
reinsert power to box
and then what? what's suppose to happen?

[King Kong]

I got the Android recovery screen to come up. No Libre yet.

[clarkss12]

I got the Android recovery screen to come up. No Libre yet.

You need to find the correct device tree for your box. Name it to dtb.img and copy that to the root of your micro SD card.

You are missing the correct device tree, that is why it's booting into the recovery menu.

[King Kong]

I could have sworn seeing that on the new release it says that the dbt did not need updating. I'll give it a try and see which dbt works.

[clarkss12]

I could have sworn seeing that on the new release it says that the dbt did not need updating. I'll give it a try and see which dbt works.

Ok

[King Kong]

Okay I managed to get it working.
I used the gxm_kvim2.dtb
Libre is loaded and I'm at the Kodi setup but unfortunately with no remote control or usb input to go through the menu.

[clarkss12]

Okay I managed to get it working.
I used the gxm_kvim2.dtb
Libre is loaded and I'm at the Kodi setup but unfortunately with no remote control or usb input to go through the menu.

Keep trying other device trees, if you mean the one that you have your remote does not work with. Or get a wireless remote that usually dongle and those are usually better anyway.

[King Kong]

Got the remote to work.

Copy and replaced the Remote.conf file with this one:

https://forum.libreelec.tv/thread/4264-remote-conf-repository/?postID=91488#post91488

It matches the remote that came with my R-BOX Pro so I figured I give a try and Viola. works enough to get through the setup menu.

I'll try and get some free time to play with LibreELEC later on and update.




The micro SD card I am using if it matters is a UNIREX 32gb. supposedly with a 50mb max speed. Hopefully it doesn't cause me problems with playback.