Hi all,
I'm Benjamin from Octopuce, Paris, and we use (a lot) BlackMagicDesign Decklink SDI & HDMI/Analog cards to acquire video and audio for FocusGroups.
We were using Linux Kernel 3.2 with DesktopVideo 9.5.3 and bmdcapture from a 2013 version of bmdtools ( https://github.com/lu-zero/bmdtools ) without any problem.
We recently upgraded to Linux Kernel 3.16 with DesktopVideo 10.5 a17 and bmdcapture's latest commit. (Everything shall be upgraded since they depend on each other).
As a result we had to upgrade our BlackMagicDesign Decklink HDMI from firmware 0x1e to 0x25.
Since then, and with perfectly random results, we have an inversion of the left and right audio channels when recording. Sometime they are inverted, sometime they are not. Having left and right stable is particularly important to us since one channel have the original language and the other have the real-time translated one...
The randomness of it is quite perfect: half the time, and without a need to reboot or poweroff the hardware: each time we stop / start a bmdcapture process, the left and right are randomly inverted or not...
So the question is
- does anybody here from BMD or others know about such problem already?
- If not, does any of you have an idea about how we could fix this?
- In any case, what can we do (as of now we just downgraded everything back to 9.5.3 and 3.2, but that's not a viable solution...)
We are willing to help BMD debugging this if needed, eg by testing other version of desktopvideo between 9.5.3 and 10.5 if needed, or future versions in our lab.
Thanks for any help you may bring us!
regards,
Benjamin Sonntag
I'm Benjamin from Octopuce, Paris, and we use (a lot) BlackMagicDesign Decklink SDI & HDMI/Analog cards to acquire video and audio for FocusGroups.
We were using Linux Kernel 3.2 with DesktopVideo 9.5.3 and bmdcapture from a 2013 version of bmdtools ( https://github.com/lu-zero/bmdtools ) without any problem.
We recently upgraded to Linux Kernel 3.16 with DesktopVideo 10.5 a17 and bmdcapture's latest commit. (Everything shall be upgraded since they depend on each other).
As a result we had to upgrade our BlackMagicDesign Decklink HDMI from firmware 0x1e to 0x25.
Since then, and with perfectly random results, we have an inversion of the left and right audio channels when recording. Sometime they are inverted, sometime they are not. Having left and right stable is particularly important to us since one channel have the original language and the other have the real-time translated one...
The randomness of it is quite perfect: half the time, and without a need to reboot or poweroff the hardware: each time we stop / start a bmdcapture process, the left and right are randomly inverted or not...
So the question is
- does anybody here from BMD or others know about such problem already?
- If not, does any of you have an idea about how we could fix this?
- In any case, what can we do (as of now we just downgraded everything back to 9.5.3 and 3.2, but that's not a viable solution...)
We are willing to help BMD debugging this if needed, eg by testing other version of desktopvideo between 9.5.3 and 10.5 if needed, or future versions in our lab.
Thanks for any help you may bring us!
regards,
Benjamin Sonntag