Hdmi grabber?

  • At least the V4L2 API for Linux is mentioned in the product description. Hyperion uses this api for the "normal" av grabbers. So I think if the device will show up in /dev it will work.
    But if the card will work out of the box (will show up as a device) I can't tell you. Maybe you have to figure out right drivers.


    I think you will have to try it.

  • Ok well got this device sooner then expected, hopefully its plug and play...


    Maybe a dev can chime in to guide me on how to see if we can make it work..


    i got this from HyperCon


    ssh in: hyperion-v4l2:
    ssh in: version : V1.03.4 (brindosch-c750c41/dc6a602-1522918225
    ssh in: build time: Apr 5 2018 01:57:25
    ssh out: VIDIOC_S_STD ERROR 25, Inappropriate ioctl for device
    sftp getFile(./screenshot.png, java.awt.Image)


    and from putty


    pi@raspberrypi:~ $ v4l2-ctl --list-devices
    ezcap U3 capture (usb-20980000.usb-1.3):
    /dev/video0

  • try it this way


    https://hyperion-project.org/w…-V42L-Grabber-USB-Grabber


    it is also a video0...try to make a screenhsot



    this is the output?


    pi@raspberrypi:~ $ sudo hyperion-v4l2 --width 320 --height 180 --screenshot
    hyperion-v4l2:
    version : V1.03.4 (brindosch-c750c41/dc6a602-1522918225
    build time: Apr 5 2018 01:57:25
    V4L2GRABBER INFO: width=640 height=480
    V4L2GRABBER ERROR: Only pixel formats UYVY, YUYV, and RGB32 are supported ERROR


    this is -lshw output


    *-usb:1
    description: Video
    product: ezcap U3 capture
    vendor: VXIS Inc
    physical id: 3
    bus info: usb@1:1.3
    version: 1.00
    capabilities: usb-2.10
    configuration: driver=snd-usb-audio maxpower=500mA speed=480Mbit/s


    This is what -v4l2-ctl --all outputs.


    pi@raspberrypi:~ $ v4l2-ctl --all
    Driver Info (not using libv4l2):
    Driver name : uvcvideo
    Card type : ezcap U3 capture
    Bus info : usb-20980000.usb-1.3
    Driver version: 4.9.35
    Capabilities : 0x84200001
    Video Capture
    Streaming
    Extended Pix Format
    Device Capabilities
    Device Caps : 0x04200001
    Video Capture
    Streaming
    Extended Pix Format
    Priority: 2
    Video input : 0 (Camera 1: ok)
    Format Video Capture:
    Width/Height : 640/480
    Pixel Format : 'MJPG'
    Field : None
    Bytes per Line: 0
    Size Image : 614400
    Colorspace : SRGB
    Flags :
    Crop Capability Video Capture:
    Bounds : Left 0, Top 0, Width 640, Height 480
    Default : Left 0, Top 0, Width 640, Height 480
    Pixel Aspect: 1/1
    Selection: crop_default, Left 0, Top 0, Width 640, Height 480
    Selection: crop_bounds, Left 0, Top 0, Width 640, Height 480
    Streaming Parameters Video Capture:
    Capabilities : timeperframe
    Frames per second: 30.000 (30/1)
    Read buffers : 0
    brightness (int) : min=0 max=255 step=1 default=-8193 value=128
    contrast (int) : min=0 max=255 step=1 default=57343 value=128
    saturation (int) : min=0 max=255 step=1 default=57343 value=128
    hue (int) : min=-32 max=31 step=1 default=-8193 value=0
    brightness (int) : min=0 max=255 step=1 default=-8193 value=128
    contrast (int) : min=0 max=255 step=1 default=57343 value=128
    saturation (int) : min=0 max=255 step=1 default=57343 value=128
    hue (int) : min=-32 max=31 step=1 default=-8193 value=0


  • pi@raspberrypi:~ $ v4l2-ctl -v width=1280,height=720,pixelformat=BGR32
    pi@raspberrypi:~ $ sudo hyperion-v4l2 --width 320 --height 180 --screenshot
    hyperion-v4l2:
    version : V1.03.4 (brindosch-c750c41/dc6a602-1522918225
    build time: Apr 5 2018 01:57:25
    V4L2GRABBER INFO: width=640 height=480
    V4L2GRABBER ERROR: Only pixel formats UYVY, YUYV, and RGB32 are supported ERROR


    pi@raspberrypi:~ $ v4l2-ctl --set-fmt-video=width=1920,height=1080,pixelformat=YUYV
    pi@raspberrypi:~ $ sudo hyperion-v4l2 --width 320 --height 180 --screenshot hyperion-v4l2:
    version : V1.03.4 (brindosch-c750c41/dc6a602-1522918225
    build time: Apr 5 2018 01:57:25
    V4L2GRABBER INFO: width=640 height=480
    V4L2GRABBER ERROR: Only pixel formats UYVY, YUYV, and RGB32 are supported ERROR



    this is the problem for sure, when i do a v4l2-ctl --list-formats 'MJPG' is the only supported pixel format, like I said I guess this means I'am out of luck


    pi@raspberrypi:~ $ v4l2-ctl --list-formats
    ioctl: VIDIOC_ENUM_FMT
    Index : 0
    Type : Video Capture
    Pixel Format: 'MJPG' (compressed)
    Name : Motion-JPEG

  • Hm I don't know exactly how it works but I took a quick look in the sourcecode.
    Perhabs it is possible to implement it for hyperion. But I don't how different & difficult the implementation would be.


    @Paulchen-Panther do you have an idea?


    I'm willing to try anything with some guidance, I have some linux experience but nothing crazy to the standards of a developer..

  • Please excuse me for contacting you so late. I had a look last weekend and i think it is possible to implement the MJPEG encoding. I will come to programming this Sunday.
    I have no V4L2 device what MJPEG outputs, so I will try to use a virtual device.
    I will not forget you, I promise.


    That awesome thanks... let me know and I'm More then willing to test and try what you need

  • Could you test my branch? I added some debug output in case it did not work. So please start Hyperion with the debug switch. (hyperion -d)
    If any questions, please do not be shy. ;)
    Note: Please install the additional dependency libjpeg-dev (sudo apt-get install libjpeg-dev)


    You might need to dumb that down for me sorry. How do I install your branch of hyperion?

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