Arch Linux User Repository

I finally had time to investigate the issue. It looks like that as of 11.5, the DesktopVideoHelper.service has to be running for the capture card to work properly.

Just tested a little bit and it seems to work well with the update on 5.9.1

I just pushed an update with patches for kernels 5.9.1. As usual, I'm not a kernel module developer so I hope my patches do not introduce bugs. Otherwise I recommend you to use the kernel-lts and let blackmagic that their modules to be patched for newer kernels.

Thank you, ToadKing.

Setting mode to 1080p59.94 and pixel format to 8-bit BGRA on my DeckLink Mini Recorder 4k did it.

Same, new version builds and works on my Intensity Pro 4K. Thanks for the quick fix!

Also for people that are running into an issue with the Intensity Pro 4K in OBS, there's currently a bug where you have to set the mode and pixel format manually for it to work: https://github.com/obsproject/obs-studio/issues/3277

Works for me on kernel 5.8.1 with my Blackmagic Intensity Pro.

I just pushed a new revision with fixes for kernel 5.8.1. On top of the Makefile error I had to patch blackmagic_lib.c to reflect changes in kernel 5.8. Modules build and load correctly however I cannot test them on my card right now so let me know if my second fix is not working.

Just to add evidence: I am experiencing exactly the same issue as ToadKing, same kernel 5.8.1-arch1-1, and latest decklink 11.6-1.

It looks like the user nettings over at the blackmagic forums figured out a fix:

https://forum.blackmagicdesign.com/viewtopic.php?f=18&t=118975&p=657957&hilit=decklink#p657493

Looks like the new 5.8 kernel broke the DKMS install.

KMS make.log for blackmagic-io-11.6a26 for kernel 5.8.1-arch1-1 (x86_64)
Fri 14 Aug 2020 11:41:37 PM CDT
make -C /lib/modules/5.8.1-arch1-1/build M=/var/lib/dkms/blackmagic-io/11.6a26/build
make[1]: Entering directory '/usr/lib/modules/5.8.1-arch1-1/build'
AR      /var/lib/dkms/blackmagic-io/11.6a26/build/built-in.a
CC [M]  /var/lib/dkms/blackmagic-io/11.6a26/build/bmio_client.o
CC [M]  /var/lib/dkms/blackmagic-io/11.6a26/build/bmio_dev.o
CC [M]  /var/lib/dkms/blackmagic-io/11.6a26/build/bmio_device.o
CC [M]  /var/lib/dkms/blackmagic-io/11.6a26/build/bmio_driver.o
CC [M]  /var/lib/dkms/blackmagic-io/11.6a26/build/bmio_export.o
CC [M]  /var/lib/dkms/blackmagic-io/11.6a26/build/bmio_serial.o
SHIPPED /var/lib/dkms/blackmagic-io/11.6a26/build/blackmagic.o
CC [M]  /var/lib/dkms/blackmagic-io/11.6a26/build/bmio_pci_ids.o
CC [M]  /var/lib/dkms/blackmagic-io/11.6a26/build/bm_locks.o
CC [M]  /var/lib/dkms/blackmagic-io/11.6a26/build/bm_mm.o
CC [M]  /var/lib/dkms/blackmagic-io/11.6a26/build/bm_pci.o
CC [M]  /var/lib/dkms/blackmagic-io/11.6a26/build/bm_util.o
CC [M]  /var/lib/dkms/blackmagic-io/11.6a26/build/bmio_audio.o
/var/lib/dkms/blackmagic-io/11.6a26/build/bmio_serial.c: In function ‘bmio_serial_remove’:
/var/lib/dkms/blackmagic-io/11.6a26/build/bmio_serial.c:267:2: warning: ISO C90 forbids mixed declarations and code [-Wdeclaration-after-statement]
267 |  struct tty_struct *tty = tty_port_tty_get(&serial->port);
    |  ^~~~~~
LD [M]  /var/lib/dkms/blackmagic-io/11.6a26/build/blackmagic-io.o
LD [M]  /var/lib/dkms/blackmagic-io/11.6a26/build/snd_blackmagic-io.o
MODPOST /var/lib/dkms/blackmagic-io/11.6a26/build/Module.symvers
/var/lib/dkms/blackmagic-io/11.6a26/build/.blackmagic.o.cmd: No such file or directory
make[2]: *** [scripts/Makefile.modpost:111: /var/lib/dkms/blackmagic-io/11.6a26/build/Module.symvers] Error 1
make[1]: *** [Makefile:1669: modules] Error 2
make[1]: Leaving directory '/usr/lib/modules/5.8.1-arch1-1/build'
make: *** [Makefile:46: all] Error 2

I get the same error on my intensity pro. However obs and MediaExpress are both working fine on my machine. So I suppose this is a bug in gstreamer.