- Posts: 5
- Joined: Mon Nov 16, 2020 6:58 am
- Real Name: Qi Zhang
Hello Developers:
The image is misaligned when using DeckLink 8K Pro to capture SDI signal
We used the "DeckLink 8K Pro" capture card, which is based on Blackmagic_DeckLink_SDK_11.5.1, to develop our own application. But we found a serious problem:
SDI Mode: four sub-devices half-duplex
after a long period of signal acquisition, we had to use the "DeckLink 8K Pro" capture card, which is based on Blackmagic_DeckLink_SDK_11.5.1. Captured images will be misaligned (happens with all 4 SDI interfaces)
1. High probability of recurrence, occurring almost 4-5 times a week; (8-12 hours a day, 4 signals collected simultaneously); It's also possible to misplace it after 2 hours of use.
2. can only be restored by rebooting the operating system. Even if you use rmmod to uninstall the driver and then use modprobe to reload the driver for blackmagic, the image will not return to normal.
3. Sometimes there are problems with four SDIs at the same time, and sometimes there are problems with one or two SDIs.
4. See annex for screenshots (some of the rightmost pixels have been moved to the leftmost)
Currently our product is in the near commercial phase, but this problem occurs, looking for your support and provide Debug ideas, thank you!
Let us know as soon as you need any information on commissioning or fit issues.
Input signal format:1080 25p, 1080 50i, 1080 60i
The image is misaligned when using DeckLink 8K Pro to capture SDI signal
We used the "DeckLink 8K Pro" capture card, which is based on Blackmagic_DeckLink_SDK_11.5.1, to develop our own application. But we found a serious problem:
SDI Mode: four sub-devices half-duplex
after a long period of signal acquisition, we had to use the "DeckLink 8K Pro" capture card, which is based on Blackmagic_DeckLink_SDK_11.5.1. Captured images will be misaligned (happens with all 4 SDI interfaces)
1. High probability of recurrence, occurring almost 4-5 times a week; (8-12 hours a day, 4 signals collected simultaneously); It's also possible to misplace it after 2 hours of use.
2. can only be restored by rebooting the operating system. Even if you use rmmod to uninstall the driver and then use modprobe to reload the driver for blackmagic, the image will not return to normal.
3. Sometimes there are problems with four SDIs at the same time, and sometimes there are problems with one or two SDIs.
4. See annex for screenshots (some of the rightmost pixels have been moved to the leftmost)
Currently our product is in the near commercial phase, but this problem occurs, looking for your support and provide Debug ideas, thank you!
Let us know as soon as you need any information on commissioning or fit issues.
- Code: Select all
Ubuntu 18.04.4 LTS (Bionic Beaver)
Kernel: 5.3.0-28-generic
Desktop: Blackmagic_Desktop_Video_Linux_11.5.1
SDK: Blackmagic_DeckLink_SDK_11.5.1
- Code: Select all
Root> lspci -vvv
01:00.0 Multimedia video controller: Blackmagic Design DeckLink 8K Pro
Subsystem: Blackmagic Design DeckLink 8K Pro
Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr+ Stepping- SERR+ FastB2B- DisINTx+
Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 0
Interrupt: pin A routed to IRQ 145
Region 0: Memory at df300000 (64-bit, non-prefetchable) [size=1M]
Capabilities: <access denied>
Kernel driver in use: blackmagic-io
Kernel modules: blackmagic_io
- Code: Select all
Driver ->
blackmagic, 11.5.1a14, 5.3.0-28-generic, x86_64: installed
blackmagic-io, 11.5.1a14, 5.3.0-28-generic, x86_64: installed
Input signal format:1080 25p, 1080 50i, 1080 60i
- Attachments
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- blackmagic_003.jpg (103.29 KiB) Viewed 2729 times
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- blackmagic_002.jpg (653.97 KiB) Viewed 2729 times
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- blackmagic_001.jpg (198.92 KiB) Viewed 2729 times
Blackmagic Design DeckLink 8K Pro
Blackmagic Design DeckLink 4K Pro
Blackmagic Design DeckLink 4K Mini
Blackmagic Design DeckLink 4K Pro
Blackmagic Design DeckLink 4K Mini