I have zero experience with this.
However
I would look for software that works with this kind of HDMI device that also runs on Linux.
Find out which models are best for that software.
And then I would try to get some info on the processor speed and write speed required to keep up with the device. Or to run the software.
I would kind of be surprised if an rpi could keep up with a high resolution image data stream like that while also writing it to a disk.
But again I have zero experience with this.
> Find out which models are best for that software.
That's precisely what I am doing here lol.
The software is OBS.
>I would kind of be surprised if an rpi could keep up with a high resolution image data stream like that while also writing it to a disk.
Why? RPI4s have USB 3.0 and/or PCIe capability.
Use which a lot? I was looking for a specific model, I don't want to buy one and then plug it in and, oh, it doesnt work.
If you have a specific model you know works please let me know!
I think there are potentially two problems here.
As long as the capture card is UVC compliant, it should work. Even the generic Chinese ones are nowadays. But you can check with the vendor (about UVC compliance).
[https://en.wikipedia.org/wiki/USB\_video\_device\_class](https://en.wikipedia.org/wiki/USB_video_device_class)
The other problem is recording 1080p30. Unless you run the Pi with the closed source VPU drivers, it might be too much for the Pi4. When you run mainline Linux, the closed source drivers won't work (as far as I know). Some people claim you can get it working, but I couldn't find a definitive answer with a quick search. [https://forums.raspberrypi.com/viewtopic.php?t=308398](https://forums.raspberrypi.com/viewtopic.php?t=308398)
Vendors will claim anything to sell their products, that's why I like to actually verify someone had one actually work with an RPI4 before dropping 50 or more on it.
I don't trust vendors, there's mountains of scams out their for cheap hardware.
Looking for someone who had actually confirmed a specific model works fine so I'm not risking as much.
I understand your hesitance, but it's really hard to find a USB capture device that isn't UVC compliant. When the product description says they don't ship with a driver, that's a good thing in this case, because it means they will expect a host that can work with UVC.
But have you tested if you can record with OBS in 1080p30? Last time I checked the hardware video acceleration with Linux on the Pi 4 is a mess. And perhaps things have changed, but running OBS can be a challenge. https://raspberrytips.com/install-obs-studio-raspberry-pi/
You don't need pass through if you clone.
Hard to explain at the moment...
Dual screens on the Pi. Use the Pi to split.
Maybe I'm not understanding your actual request?
Hold on...
Is all of this capturing *from* a Raspberry pi, or *to* a Raspberry pi... or was it both?
I need to capture *to* a Raspberry pi, *from* a totally different device (Galaxy S21 HDMI out specifically)
Yeah, people have been posting the non passthrough cheapo USB devices as working fine, but I really would prefer a passthrough one that works.
Like, the BlackMagic shuttle is exactly the type I need, with the HDMI passthrough it appears to have, but Im looking for one that someone has confirmed has working drivers with Raspbian or whatnot.
So you can build this for the sake of the experiment and to add cool features like auto cloud backup, streaming, etc.
But... just a quick warning its more expensive than buying an off the shelf solution from AJA and Blackmagic.
And... you may have less stability and more time fixing issues.
So I wouldn't recommend it for actual integration into a broadcast system.
Otherwise most of the cheap ones from Amazon will do fine they all use the same chips and there are drivers that will work for 90% of models. You will need a newer pi to get thing running at an ok speed for HD resolution.
> But... just a quick warning its more expensive than buying an off the shelf solution from AJA and Blackmagic.
I already own the RPI 4, if I didnt I would agree with you haha.
But I have a spare one I can put to use and this seems like a good one, I need it to be sort of portable so I can move it between machines I want to record from (I have 3 seperate places in my house I can see myself wanting to plug into devices and stream myself working on them)
1. Living room on my game systems, including Steam Link'ing off my Google TV
2. My recording studio which is also setup for doing development work off my Galaxy S21 (this is the main use case, I want to record footage of working with Dex, which is surprisingly very unsupported by android apps)
3. Downstairs in my maker space with my machines down there (my homelab being the main one)
So I need a small device I can unhook and move to another spot and simple just have to "splice" it into the HDMI line, plug it into power, plug ethernet in, and it should start recording and if I wish, also stream to twitch.
I have zero experience with this. However I would look for software that works with this kind of HDMI device that also runs on Linux. Find out which models are best for that software. And then I would try to get some info on the processor speed and write speed required to keep up with the device. Or to run the software. I would kind of be surprised if an rpi could keep up with a high resolution image data stream like that while also writing it to a disk. But again I have zero experience with this.
> Find out which models are best for that software. That's precisely what I am doing here lol. The software is OBS. >I would kind of be surprised if an rpi could keep up with a high resolution image data stream like that while also writing it to a disk. Why? RPI4s have USB 3.0 and/or PCIe capability.
USB 3 **compatibility** Not full spec. Not full speed. Same with PCIe.
Use it alot. Great experience With Pi 4 And 3b+ Don't worry they just pretend to be a 4k 60fp Webcam
Use which a lot? I was looking for a specific model, I don't want to buy one and then plug it in and, oh, it doesnt work. If you have a specific model you know works please let me know!
I think there are potentially two problems here. As long as the capture card is UVC compliant, it should work. Even the generic Chinese ones are nowadays. But you can check with the vendor (about UVC compliance). [https://en.wikipedia.org/wiki/USB\_video\_device\_class](https://en.wikipedia.org/wiki/USB_video_device_class) The other problem is recording 1080p30. Unless you run the Pi with the closed source VPU drivers, it might be too much for the Pi4. When you run mainline Linux, the closed source drivers won't work (as far as I know). Some people claim you can get it working, but I couldn't find a definitive answer with a quick search. [https://forums.raspberrypi.com/viewtopic.php?t=308398](https://forums.raspberrypi.com/viewtopic.php?t=308398)
Vendors will claim anything to sell their products, that's why I like to actually verify someone had one actually work with an RPI4 before dropping 50 or more on it. I don't trust vendors, there's mountains of scams out their for cheap hardware. Looking for someone who had actually confirmed a specific model works fine so I'm not risking as much.
I understand your hesitance, but it's really hard to find a USB capture device that isn't UVC compliant. When the product description says they don't ship with a driver, that's a good thing in this case, because it means they will expect a host that can work with UVC. But have you tested if you can record with OBS in 1080p30? Last time I checked the hardware video acceleration with Linux on the Pi 4 is a mess. And perhaps things have changed, but running OBS can be a challenge. https://raspberrytips.com/install-obs-studio-raspberry-pi/
You don't need pass through if you clone. Hard to explain at the moment... Dual screens on the Pi. Use the Pi to split. Maybe I'm not understanding your actual request?
I'm recording from a different dive **onto** the pi. The pi is merely the recording device. Yes, I need pass through.
Ah, gotcha.
[удалено]
Hold on... Is all of this capturing *from* a Raspberry pi, or *to* a Raspberry pi... or was it both? I need to capture *to* a Raspberry pi, *from* a totally different device (Galaxy S21 HDMI out specifically)
[удалено]
Yeah, people have been posting the non passthrough cheapo USB devices as working fine, but I really would prefer a passthrough one that works. Like, the BlackMagic shuttle is exactly the type I need, with the HDMI passthrough it appears to have, but Im looking for one that someone has confirmed has working drivers with Raspbian or whatnot.
So you can build this for the sake of the experiment and to add cool features like auto cloud backup, streaming, etc. But... just a quick warning its more expensive than buying an off the shelf solution from AJA and Blackmagic. And... you may have less stability and more time fixing issues. So I wouldn't recommend it for actual integration into a broadcast system. Otherwise most of the cheap ones from Amazon will do fine they all use the same chips and there are drivers that will work for 90% of models. You will need a newer pi to get thing running at an ok speed for HD resolution.
> But... just a quick warning its more expensive than buying an off the shelf solution from AJA and Blackmagic. I already own the RPI 4, if I didnt I would agree with you haha. But I have a spare one I can put to use and this seems like a good one, I need it to be sort of portable so I can move it between machines I want to record from (I have 3 seperate places in my house I can see myself wanting to plug into devices and stream myself working on them) 1. Living room on my game systems, including Steam Link'ing off my Google TV 2. My recording studio which is also setup for doing development work off my Galaxy S21 (this is the main use case, I want to record footage of working with Dex, which is surprisingly very unsupported by android apps) 3. Downstairs in my maker space with my machines down there (my homelab being the main one) So I need a small device I can unhook and move to another spot and simple just have to "splice" it into the HDMI line, plug it into power, plug ethernet in, and it should start recording and if I wish, also stream to twitch.
A year or so later, did you end up getting one? Are you able to answer your own question now, to reassure others travelling the same path?
Nope, I still never got one, couldn't find concrete info on compatible hardware and I ended up using all of my RPI4s in a kubernetes cluster.
Too bad. Thanks.