1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

RPi + OpenELEC Frame Grabber only grabs a blackish screen

Discussion in 'Hardware Support' started by rugbert, 25 March 2018.

  1. rugbert

    rugbert New Member

    Messages:
    10
    Hardware:
    RPi3
    I'm configuring Hyperion (with the HyperCon app) and when I try to grab an image from the frame grabber I just get a black screen with some random seeming colors.

    My hardware is the typical setup: HDMI splitter -> HDMI2AV mini (upscales to 1080p) -> EasyCap USBTV007 -> RPI3

    In the attached screenshot I have both the video settings and the preview image I'm getting from the grabber.

    Note - I have since changed the Height and Width to: 720width 480height and it still only produces a black screen

    Also - here are the logs when I take a screenshot:

    ssh: $ killall hyperiond 2>/dev/null ; /storage/hyperion/bin/hyperion-v4l2.sh --device /dev/video0 --video-standard NTSC --input 0 --width 720 --height 480 --crop-left 0 --crop-right 0 --crop-top 0 --crop-bottom 0 --size-decimator 1 --frame-decimator 2 --red-threshold 0.0 --green-threshold 0.0 --blue-threshold 0.0 --screenshot
    ssh: hyperion-v4l2:
    ssh: version : V1.03.3 (brindosch-2fbbcff/2f01dfa-1495880388
    ssh: build time: Jun 3 2017 02:06:37
    ssh: V4L2GRABBER INFO: width=720 height=480
    ssh: V4L2GRABBER INFO: pixel format=YUYV
    ssh: V4L2GRABBER INFO: signal threshold set to: {0,0,0}
    ssh: V4L2GRABBER INFO: started
    ssh: V4L2GRABBER INFO: stopped
    sftp getFile(./screenshot.png, image)​
     

    Attached Files:

    Last edited: 25 March 2018
  2. LunarBlue

    LunarBlue Member

    Messages:
    85
    Hardware:
    RPi1/Zero
    You sure you bought the right HDMI2AV? You wrote "HDMI2AV mini (upscales to 1080p)", looks more like a AV2HDMI. Can you send a picture ?
     
  3. rugbert

    rugbert New Member

    Messages:
    10
    Hardware:
    RPi3
  4. LunarBlue

    LunarBlue Member

    Messages:
    85
    Hardware:
    RPi1/Zero
    There are two versions, what stands on top of your converter?

    [​IMG]
    [​IMG]
    [​IMG]
     
  5. rugbert

    rugbert New Member

    Messages:
    10
    Hardware:
    RPi3
    I definitely have the HDMI2AV model, the HDMI is labeled as input.
     

    Attached Files:

  6. LunarBlue

    LunarBlue Member

    Messages:
    85
    Hardware:
    RPi1/Zero
    alright, then that seems fine. Can you do
    Code:
    v4l2-ctl --all
    and post the results in here.
     
  7. rugbert

    rugbert New Member

    Messages:
    10
    Hardware:
    RPi3
    Code:
    OpenELEC:~ # v4l2-ctl
    -sh: v4l2-ctl: not found
    
     
  8. LunarBlue

    LunarBlue Member

    Messages:
    85
    Hardware:
    RPi1/Zero
    thats not good :D please install v4l2 then :)

    Code:
    sudo apt-get install v4l-utils
     
  9. rugbert

    rugbert New Member

    Messages:
    10
    Hardware:
    RPi3
    OpenElec has removed apt from the OS so I can't install it. But for whatever reason, this thing has magically started working. I did jiggle some cords so maybe that had something to do with it?
     
  10. ErucLstar

    ErucLstar New Member

    Messages:
    3
    Hardware:
    RPi3
    I've the same problem. I found another .sh that could throw up the output that you need:

    OpenELEC:~/hyperion/bin # ./hyperion-v4l2.sh
    hyperion-v4l2:
    version : V1.03.4 (brindosch-c750c41/dc6a602-1522918225
    build time: Apr 5 2018 01:57:25
    V4L2GRABBER INFO: width=720 height=480
    V4L2GRABBER INFO: pixel format=YUYV
    V4L2GRABBER INFO: signal threshold set to: {0,0,0}
    PROTOCONNECTION INFO: Connecting to Hyperion: 127.0.0.1:19445
    V4L2GRABBER INFO: started
    V4L2GRABBER INFO: Signal lost
    V4L2GRABBER INFO: Signal detected
    PROTOCONNECTION INFO: No connection to Hyperion: 127.0.0.1:19445
    V4L2GRABBER INFO: Signal lost
    V4L2GRABBER INFO: Signal detected

    As you can see... grabber enters in a loop connection :_(
    PLZ!! could you help me?¿?

    Thanks