CD-ROM + MakeMKV

General
1

tldr; why can Kodi communicate with the CD-ROM but makemkvcon/eject can’t?

I’m using a Homatics Box R 4K Plus with the CD-ROM in the USB 2.0 port and CoreELEC running in the USB 3.0 port. Using CoreELEC ng.arm-21.1.1

Is the CD-ROM somehow locked down for exclusivity for Kodi? Kodi can eject the CD-ROM and detect the type of disc in the drive (blu-ray in this case). However, I get a bus error via SSH when running “./makemkvcon info”. If I try “eject /dev/sr0” there’s a I/O error. I installed a 64-bit Docker version and the webui states that it can’t find any optical drives. If I use eject /dev/sr0 inside that container it states it’s busy.

2

Try stopping Kodi systemctl stop kodi then see if you can access the drive, this should tell you if Kodi is taking exclusive control of the drive.

3

I tried. If the drive is empty I can eject it and I use systemctl stop kodi. As soon as I put a disc in, I can no longer do either.

CoreELEC:~ # eject /dev/sr0 # Success here
CoreELEC:~ # eject /dev/sr0 # Error
eject: /dev/sr0: Input/output error
CoreELEC:~ # systemctl stop kodi
-sh: /usr/bin/systemctl: Input/output error

If I manually eject the disc, remove it and close the tray everything works again, even after the errors! So, only when a disc is in the drive do these errors occur. The disc I’m testing with is a 4K UHD of Real Genius which rips fine in the same drive on my x64 systems.

4

I don’t know anything about the CD-ROM but seems your installation is broken because of this output.
Can you post url after

dmesg | paste
5

https://github.com/CoreELEC/CoreELEC/releases/download/21.1.1-Omega/CoreELEC-Amlogic-ng.arm-21.1.1-Omega-Generic.img.gz

Again, if I remove the disc, the errors go away and I can use “systemctl” and “eject” again. So the errors only seem to happen when a disc is in the CD-ROM and/or mounted. But, Kodi can eject the disc and browse the filesystem, although it can’t play the disc or a file in BDMV/STREAM/*.m2ts. I can’t do anything outside of Kodi,“eject /dev/sr0” does nothing, makemkvcon gives a bus error… everything is broken.

I see in 21.2 there is “Fixed seek of BluRay ISO”, could this relate to seeking of physical discs in a CD-ROM? It’s still UDF 2.5 right?

I’ve also tried with “dtech’s” makemkv addon from here [SOLVED] MakeMKV v1.17.8 - "This application version is too old. Please download the latest..." - Page 2 - www.makemkv.com which doesn’t seem to work either.

From the end of /storage/.kodi/temp/kodi.log

2025-02-08 15:10:10.674 T:4090     info <general>: JSONRPC v13.5.0: Successfully initialized
2025-02-08 15:10:10.674 T:4090     info <general>: [Media Detection] starting service for optical media detection
2025-02-08 15:10:10.683 T:4326     info <general>: Detecting DVD-ROM media filesystem...
2025-02-08 15:10:10.694 T:4090     info <general>: AddOnLog: peripheral.joystick: Enabling joystick interface "linux"
2025-02-08 15:10:10.700 T:4326  warning <general>: dll_ioctl - 21392 request failed with error [5] Input/output error
2025-02-08 15:10:10.705 T:4090     info <general>: Register - new keyboard device registered on application->keyboard: Keyboard (0000:0000)
2025-02-08 15:10:10.705 T:4090     info <general>: Register - new mouse device registered on application->mouse: Mouse (0000:0000)
2025-02-08 15:10:10.707 T:4090     info <general>: Loading player core factory settings from special://xbmc/system/playercorefactory.xml.
2025-02-08 15:10:10.709 T:4090     info <general>: Loaded playercorefactory configuration
2025-02-08 15:10:10.709 T:4090     info <general>: Loading player core factory settings from special://masterprofile/playercorefactory.xml.
2025-02-08 15:10:10.709 T:4090     info <general>: special://masterprofile/playercorefactory.xml does not exist. Skipping.
2025-02-08 15:10:10.709 T:4090     info <general>: removing tempfiles
2025-02-08 15:10:10.722 T:4090     info <general>: initialize done
2025-02-08 15:10:10.722 T:4090     info <general>: Running the application...
2025-02-08 15:10:10.729 T:4090     info <general>: starting zeroconf publishing
2025-02-08 15:10:10.735 T:4337     info <general>: ES: Starting UDP Event server on port 9777
2025-02-08 15:10:10.735 T:4337     info <general>: UDP: Listening on port 9777 (ipv6 : false)
2025-02-08 15:10:10.736 T:4090     info <general>: JSONRPC Server: Successfully initialized
2025-02-08 15:10:10.741 T:4090     info <general>: CWSDiscoveryListenerUDP::Start - Started
2025-02-08 15:10:11.016 T:4326    error <general>: Libdvd: DVDOpenFileUDF:UDFFindFile /VIDEO_TS/VIDEO_TS.IFO failed
2025-02-08 15:10:11.016 T:4326  warning <general>: Libdvd: Can't open file VIDEO_TS.IFO.
2025-02-08 15:10:11.017 T:4326    error <general>: Libdvd: vm: vm: failed to read VIDEO_TS.IFO
2025-02-08 15:10:11.017 T:4326    error <general>: Error on dvdnav_open
2025-02-08 15:10:11.017 T:4326    error <general>: GetDirectory - Error getting /dev/cdrom/BDMV/PLAYLIST
2025-02-08 15:10:11.018 T:4326    error <general>: CBlurayDirectory::InitializeBluray - failed to open /dev/cdrom
2025-02-08 15:10:11.024 T:4326     info <general>: CD Analysis Report
2025-02-08 15:10:11.024 T:4326     info <general>: __________________________________
                                                   
2025-02-08 15:10:11.029 T:4326     info <general>: CD-ROM with unknown filesystem
2025-02-08 15:10:11.029 T:4326     info <general>: Tracks overall:1; Audio tracks:0; Data tracks:1
2025-02-08 15:10:11.029 T:4326     info <general>: Using protocol /dev/cdrom
2025-02-08 15:10:11.029 T:4326  warning <general>: Filesystem is not supported
2025-02-08 15:10:11.040 T:4329     info <general>: Register - new cec device registered on cec->AOCEC: CEC Adapter (0000:0000)
2025-02-08 15:10:11.114 T:4090     info <general>: GLES: Enabling VSYNC
2025-02-08 15:10:12.305 T:4334     info <general>: ## CoreELEC Addon ## system::set_hostname ## CoreELEC
2025-02-08 15:10:12.307 T:4334     info <general>: ## CoreELEC Addon ## system::set_keyboard_layout ## us
2025-02-08 15:10:13.001 T:4334     info <general>: ## CoreELEC Addon ## updates::updateThread ## Started
2025-02-08 15:10:13.003 T:4334     info <general>: ## CoreELEC Addon ## updates::set_auto_update ## auto
2025-02-08 15:10:13.189 T:4398     info <general>: ## CoreELEC Addon ## _service_::run ## WAITING:
2025-02-08 15:10:13.199 T:4397     info <general>: ## CoreELEC Addon ## xdbus Monitor started. ## 
2025-02-08 15:10:17.936 T:4090     info <general>: Loading controller layout: /usr/share/kodi/addons/game.controller.keyboard/resources/layout.xml

edit: I can use ls -al on the CD-ROM’s mounted directory, sorry I was using the device /dev/sr0 out of frustration.