Replies: 10 comments 26 replies
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@Xeue I tried using a DeckLink Micro SDI in my Rock 5B as well. The DeckLink kernel module hangs when trying to capture from or output to the device via the DeckLink SDK sample apps. I was running the DeckLink SDI capture, signal generator and test pattern sample apps, rather than OBS. I don't necessarily think this is an issue with the ubuntu-rockchip distro, and more likely an issue with the driver. It should probably be reported to Blackmagic, although I'm not sure how likely it is that they will investigate it, let alone address it. |
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Hey, I completely agree, I have raised it with blackmagic support, they have not responded to any emails and over the I didn't get much further than "We have a driver for ARM?" from them. So I'm not hopeful. I am going to try some other capture cards via an m2 to PCIe breakout and see what I get. I have tested in ffmpeg, gstreamer and some other bits of software and all have the same result. I also build the driver package from the files they provide in the download and have different but similar results. |
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Have you raised the issue on the Blackmagic Design forums, or only through customer support? Might be worth posting on their forum. I haven't gotten around to creating an account and doing that yet. |
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I've tried all sorts, from 625i50 all the way up 1080p60, both input and output. From rec709 to rec2020. I've tried playing looping videos via gstreamer and FFMPEG, taking screen records, recoding to files, playing out to video windows. I tried in and out via OBS. I've got the unit still set up and easy to test with, so if you have any other thoughts of things I could change or try (video or software), or any other diagnostics I can take to help narrow it down I'll do what I can! |
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Just to check the basics - you are using the Decklink Micro in the bottom M.2 slot of the 5B, correct? This slot is M.2 connector M key (bottom) for NVMe with PCIe 3.0 x4 lanes, the Decklink Micro is PCIe 3.0 1 lane, so that should work OK. Would you try some BMD examples which do NOT actually push any video, like the VANC Capture? Feed something standard, like 1080p30, it does not need to have any VANC data, so it will not display anything, but I am curious if it crashes or not. The VancOutput example feeds video out (with the VANC data), so that one will most likely crash, but the VancCapture only gets the VANC data from the SDI, not any video or audio. This applicaation is in the Examples directory of the SDK. How about the CaptureStills (this one is in Linux/Samples) - this reads the video but does not feed it anywhere. Does this crash as well? The root problem might be more likely in the driver for the PCIe specific to the SoC than in the BMD driver, at least with other similar ARM64 boards, people have tried to use things like 10 GBit Ethernet cards and they had issues that the PCIe drivers were really only ever tested with NVMe drives and did not fully work with other types of PCIe boards. I have different BMD boards here, but not the DeckLink Micro and I do not have the 5B, so I cannot really help by running any tests myself at the moment. |
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That is all correct in terms of hardware! I will start doing some deeper testing, but I have just run the VANC Capture test and it froze the board completely meaning I had to hard power it... So not looking like a good start! When reading about the 5B I saw similar reports from people which did have me worried. |
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Perhaps I have misread what these 2 messages mean... [ 232.215038] BlackmagicIO: WARNING: Ran out of free frames perhaps this does not refer to normal kernel memory, but the memory window mapped via PCIe into the address space. If the PCIe driver would have some limits on the size of the PCIe memory mapped from the M.2 board or the mapping would be done to some addresses which are not accessible by the SoC, you may be getting this kind of errors. The ffff at the start of the address seem to suggest this is not a normal RAM. Do you have access to another system (like Intel based) where this card works OK? (you mentioned you have a M.2 adapter which should allow to use the board on a standard x64 system). It would be interesting to compare the lspci verbose output between a system where it works OK and the 5B where it does not. |
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I'm at my home setup at the moment, so don't have any linux setups I can test in. The m2 adaptor hasn't arrived yet, but when it does i'll pop into base and find a system to test it on. I have managed to get a VancCapture to run and it crashed in the same way instantly. lspci: 0000:01:00.0 Multimedia video controller: Blackmagic Design DeckLink SDI Micro Kernel Logs (ignore the time, it's wrong): Oct 24 00:42:27 sygnal001 kernel: [ 399.603079] Unable to handle kernel paging request at virtual address ffff800009afa7a0 |
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@petrn I am experiencing the exact same issue as @Xeue, with the exact same card in my Rock5B (DeckLink SDI Micro M.2). I am seeing the same It doesn't seem to matter if the card is trying to do capture or output. I've reproduced it with a handful of the Blackmagic DeskLink SDK sample apps, such as The HDMI input on the Rock5B is not currently in use and I am not using the USB ports for anything other than my keyboard, so bandwidth should not be an issue. For what it is worth I have been able to successfully capture and output video at 1080p60 YCbCr using an AJA Kona 3G card connected to a PCIe x4 -> M.2 converter board. The Rock5B is theoretically capable of the bandwidth requirements for at least a single 1080p stream. I made the following posts about the issue on the Radxa and BMD forums as well
NOTE that the BMD forum post is currently pending administrator approval due to an edit I made. Check back tomorrow. |
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@handledexception Thanks for all the details. I had a look yesterday evening into the driver (BTW there is a new 12.7.1 version about 2 days old, but I doubt it will make any difference). Unfortunately when you look at the backtrace in that crash log, most of the backtrace is in the closed source part of the driver delivered as opaque blob. The AJA and Dektec drivers are fully open source, but the BMD driver is mostly closed source (and written in C++ rather than C, only the open source parts are in C). Based on the backtrace, it seems that the crash happens during the attaching to the device, and is related to interrupt handling. As mentioned, I suspect the PCIe driver for Rockchip, rather than the BMD driver as the root cause of the problem. I have checked the new RPi5 and while their PCIe external port is officially PCIe 2.0 x1, it can be set to PCIe 3.0 and as the BMD Decklink SDI Micro is a x1 card, it should work on the RPi5 (which I have preordered but not received yet). However, the adapter from the proprietary RPi PCIe connector to M.2 will only be available in early 2024. I might then give it a try, as we should get better support from the RPi team than from Rockchip/Radxa. I do not have the M.2 BMD board at the moment, but it is available in stock locally. What is good is that you have the AJA board working on the 5B, so we know that in principle the 5B should be able to handle the bandwidth of the SDI 3G adapter. Regarding your forum posts, this is how I came here - from the BMD forum. |
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Hi . I have the same problem with BMD decklink Sdi micro . Do you now know how to do it? |
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@vtv3000 Good catch. From what I've read the vmalloc size is normally set in the bootloader (i.e. Grub). But because Rock5B doesn't use Grub, I'm not sure yet how to alter the value of vmalloc. Still learning as I go along. I'll ask over in the thread about this issue on the Radxa forums: https://forum.radxa.com/t/blackmagic-decklink-sdi-micro-in-rock5b/18872 |
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Given this is a 64 bit system, the vmalloc will huge, way bigger than the available RAM. So I don't think this is relevant. If it was 32bit then yes vmalloc being too low would make sense. |
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Hi. I have x86 pc an dou2 I look on vmalloc and I see 384mb
. Yes I was try change on u-boot and no effect .
Kernel not reaction on this parameter may be need compile kernel with
malloc512 ….
пн, 30 жовт. 2023 р. о 03:38 Sam Chilton ***@***.***> пише:
… Given this is a 64 bit system, the vmalloc will huge, way bigger than the
available RAM. So I don't think this is relevant. If it was 32bit then yes
vmalloc being too low would make sense.
You can add a setting for vmalloc in /boot/firmware/ubuntuEnv.txt using
"vmalloc=512M"
I have tried that and it makes no difference.
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I have some progress with kernel 6.6 |
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So you're getting video from the input to the output? Do you still have the kernel crash when used to capture the video? |
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Yes I getting video from input to output
No kernel crash
But capture file is 0 bites !
ср, 1 лист. 2023 р. о 21:20 Sam Chilton ***@***.***> пише:
… So you're getting video from the input to the output?
Do you still have the kernel crash when used to capture the video?
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Ubuntu 22.04 kernel 6.6, which device tree overlays that you use? any kernel option added? |
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hi on new kernel i can capture video and audio BUT only low half size of image .... i think its problem pci-e driver or hardware orange pi 5 plus not suported decklink picture on this topic the same as my |
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Interesting... the Jetson Nano development kit mentioned in the older BMD forum article has PCIe Gen2 x1 (on the M.2 E-key port) - so it does not match the Decklink SDI Micro specifications of PCIe Gen3 x1 - the available bandwidth is only 1/2 of the required one (500 MB/s on PCIe 2.0 vs 1GB/s on PCIe 3.0) So if you are seeing similar artefacts on the Orange Pi 5 as on the Jetson Nano, it would suggest that the actual connection is on PCIe 2.0 speeds or there is some other problem preventing the device to work at the full speed. |
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But the BMD SDI Micro is only a x1 device, so it rather seems that the PCIe on the Orange Pi behaves as Gen 2.0 instead of Gen 3.0. If your Orange Pi has 1, 2 or 4 lanes should not make any difference, as the card only has a single PCIe (Gen 3.0) Lane and thus any of the other lanes would not be used by the card. |
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I by orange pi 5 + for work with BMD I mech pci-e on orange and Bmd All mast be ok . Bun in real world it's not work . Orange write not true information about m.2 . On another forum I read about speed m.2 ssd - about 500 mbit . For decklink need 1.5G minimum |
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I get 3GB/s read spead as benchmarked by Disks on a ssd mounted in the bottom m.2 slot. Would that be possible without pcie-3-4-lane? |
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What kernel you are use ? 5.10 or 6.. ? |
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3 GB/s is not possible with PCIe 2.0 - with 4 lanes you would get only 4x500 MB, so 2 GB/s. Also with x1 PCIe 3.0 you would not get 3 GB/s - only 1GB/s. So at least for your NVME drive, the M.2 seems to be used as Gen 3 x4 unless some caching is happening elsewhere. |
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Has anyone looked at this recently? On the new build with kernel 6.1, after installing driver, the board won't boot at all when the card is installed... |
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Confirm this issure |
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Hi, great work with this build!
I've got a blackmagic DeckLink SDI Micro in the m2 slot on a Rock 5B, it seems video input is working with the DeckLink ARM driver. But video output using OBS DeckLink Output causes OBS to freeze and go into defunct state. Lots of errors I can't even begin to understand in the kernel log...
Has anyone else had any luck with DeckLink?
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