USB HDMI Capture devices

[mvallevand]

There is a new type of USB HDMI capture device on the online sites that are really cheap so I thought I'd get one from Amazon and I was pleasantly surprised.  Mine https://www.amazon.ca/gp/product/B0888R8...UTF8&psc=1 was $30 CDN delivered (ok yes I have Prime) which is around $22 US and so it wasn't much risk plus free returns.   For testing running my FireTV 4k into it.

The main issue with these devices in general is they don't have h/w conversion build it so although the raw mjpg video and  pcm audio which can play directly with some devices, but it needs transcoding to work properly with NextPVR.  Since I am using this as an Extra it was actually not a big deal to set ffmpeg up for direct show transcoding.    It worked right away for me with Quick Sync video for h/w transcoding with the CPU under just 2% and about 17% GPU during the capture, Windows saying that the power usage is low so basically.

Sadly for this device only 2 channel PCM and only 1080p30 capture but for broadcast 1080i60 that should be the ok.  I will probably use 720p60 anyway.

The only gotcha has been the audio capture name changes depending on USB device it is plugged into.  Also because it is like a web cam Windows and your a/v program may try and restrict access to the device.

I will try and setup it up on linux later, hopefully that work ootb as a v4l device.

Any questions let me know

Martin

[shspvr]

There is a new type of USB HDMI capture device on the online sites that are really cheap so I thought I'd get one from Amazon and I was pleasantly surprised.  Mine https://www.amazon.ca/gp/product/B0888R8...UTF8&psc=1 was $30 CDN delivered (ok yes I have Prime) which is around $22 US and so it wasn't much risk plus free returns.   For testing running my FireTV 4k into it.

The main issue with these devices in general is they don't have h/w conversion build it so although the raw mjpg video and  pcm audio which can play directly with some devices, but it needs transcoding to work properly with NextPVR.  Since I am using this as an Extra it was actually not a big deal to set ffmpeg up for direct show transcoding.    It worked right away for me with Quick Sync video for h/w transcoding with the CPU under just 2% and about 17% GPU during the capture, Windows saying that the power usage is low so basically.

Sadly for this device only 2 channel PCM and only 1080p30 capture but for broadcast 1080i60 that should be the ok.  I will probably use 720p60 anyway.

The only gotcha has been the audio capture name changes depending on USB device it is plugged into.  Also because it is like a web cam Windows and your a/v program may try and restrict access to the device.

I will try and setup it up on linux later, hopefully that work ootb as a v4l device.

Any questions let me know

Martin

It not possible to capture 1080p from USB 2.0 that error it has to be USB 3.0 device for raw capture more common know as UVC Capture Device so it to rely on software encoding
It should work with Linux

[mvallevand]

Yes some devices have USB 3 though and some of the cheap devices even have blue USB 2 ports to confuse things. It doesn't have to be software encoded I use ffmpeg on Windows and linux to h/w encode them to NextPVR

Regarding linux yes it works, but my NextPVR backend is low-end and I can't get 720P@60 without errors with the setting I have tried so far. There is still CPU available so there might be more I can do.

Martin

[mvallevand]

I use an tuner type called an "Extra" in combination with an ffmpeg to capture and format the input. To use NextPVR to stream online games would not be practical and in addition it would violate the NextPVR license which is personal use only.

OBS would make more sense for this.

Martin