RPi + OpenELEC black screenshot external grabber, kodi ok

Hello,

I am having problems when interacting with an external hdmi source, in kodi, the leds are synchronized perfectly.

I can throw without errors the command to make a screenshot from an external hdmi source:



As you can see the command returns a correct answer, but the result is a totally black screenshot.



The scheme that I followed to assemble the system is as follows:



This is what the lsusb command returns:



The chip of the led stripe is APA102.

My hadrware:





And this is my hyperion config, I have deleted the code of leds and color so that the post is not very long.

{


"device": {
"colorOrder": "bgr",
"rate": 500000,
"type": "apa102",
"name": "MyPi",
"output": "/dev/spidev0.0"
},

"blackborderdetector" :
{
"enable" : true,
"threshold" : 0.14
},

"effects" :
{
"paths" :
[
"/storage/hyperion/effects"
]
},

"bootsequence" :
{
"effect" : "Rainbow swirl fast",
"duration_ms" : 3000
},

"jsonServer" :
{
"port" : 19444
},

"protoServer" :
{
"port" : 19445
},

"grabber-v4l2" :
{
"device" : "/dev/video0",
"input" : 0,
"standard" : "NTSC",
"width" : 1,
"height" : 1,
"frameDecimation" : 1,
"sizeDecimation" : 1,
"priority" : 800,
"mode" : "2D",
"cropLeft" : 1,
"cropRight" : 1,
"cropTop" : 1,
"cropBottom" : 1,
"redSignalThreshold" : 0.4,
"greenSignalThreshold" : 0.2,
"blueSignalThreshold" : 0.3
},

"endOfJson" : "endOfJson"
}

I hope you can help me.
Sorry for my bad english.
Thanks,.

 

the result is the same

 

Hi bought this model from amazon too and i send it back because it didn't work.

Like you i saw Fushicai grabber when i did a lsusb command, black screen when i tried to get a screenshot. I test many Hdmi2av but nothing to do, the grabber was the problem.

We can found a lot of HDMI2av with 1,2 or 3 chip on a similar box. I hope you haven't bought the 1 chip board shit. lol

 

How can I know which is the HDMI2av chip?

This was the one that I bought.

https://www.amazon.es/gp/product/B077GNL1V9/ref=oh_aui_detailpage_o02_s00?ie=UTF8&psc=1

 

You need to open it and see if you have something like this : ( really bad and not working )



or like that : ( much better )

 

This is the one I have, but I dont know if they are valid, what do you think?

 

The Hdmi2av looks good. I have one [email protected] very similar but your chip look smallest than my others hdmi2av ( i have 5 different hdmi2av )

If i were you i'll order a new videograbber ( because i have an issue with this one ) and keep the hdmi2av.

 

The videograbber that I bought is this:

https://www.amazon.es/gp/product/B0013BXFLG/ref=oh_aui_detailpage_o04_s00?ie=UTF8&psc=1

If it is not right, what do you recommend? or ¿what characteristics should have to buy it?

 

When i was hurry i ordered mine on lightberry here https://lightberry.eu/shop/shop/easycap-video-grabber/

But if you are not you can try aliexpress https://fr.aliexpress.com/item/USB-...Audio-Video-PC-CableS-TV-DVD/32789715588.html

And if you want a combinaison of both ( hdmi2av and videograbber ) you can get HDMI Grabber but 24p it's not working, only 50 and 60 https://fr.aliexpress.com/item/Nsen...32828134783.html?spm=a2g0s.9042311.0.0.5GtcYz

 

Oks, I'll buy the Lightberry one, when I arrive I'll try it and I'll tell you if it works.
Thanks.

 

Hello,

The lightberry order has arrived, I bought the grabber recommended by the user @AmbiMod , but the result is exactly the same, I only have a black screenshot, and the LEDs do not respond to the signals sent by the hdmi ... what else can I do? Why does not it work for me?Do I have to configure some other parameter that I do not know?Do I need some different hardware? I am open to any idea.

Thank you very much.

 

Hi,

I'm sorry to hear that but i ordered many video grabber from lightberry and all works as expected so the problem must be elsewhere.

I note in your configuration that you had used NTSC but if we take a look on this website https://www.son-video.com/guide/les-standards-de-la-television we can see that in Spain we need to use PAL like for me in France but you know better than me or anybody else which format to use.

Switch all your configuration to PAL ( HDMI2av and hyperion config file ) and try if you get something.

You also can try to not use your splitter using for exemple Windows duplicate screen function, this is what i do when i waiting for my splitter.

For me the splitter and the videograbber are not the problem. Maybe software with your grabber configuration or Hardware with your HDMI2av.

I hope you'll find a way to resolve your problem.

 

Did you solve the problem @reijo? I'm stocked with the same problem and i'm following the same architecture and config as you

 

Hello,
not for now, I hope that in the future I can solve it, and I have a lot of test, also what @AmbiMod put in the above post that I forgot to answer (switch between NTSC and PAL) if you find another solution, or try something, I'm sure we can help each other and find a answer for make it work

 

I'm facing with connect disconnect problem on grabber when I execute a more specific instruction for the screenshot:

OpenELEC:~/hyperion/bin # /storage/hyperion/bin/hyperion-v4l2.sh --device /dev/video0 --video-standard PAL --input 0 --width -1 --height -1 --crop-left 0 --crop-right 0 --crop-top 0
--crop-bottom 0
hyperion-v4l2:
version : V1.03.4 (brindosch-c750c41/dc6a602-1522918225
build time: Apr 5 2018 01:57:25
V4L2GRABBER INFO: width=720 height=576
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​

 

Hi, do you guys have any update on this one? I am also facing the same issue.

 

I had the setup working perfectly fine last night, had to add extra 5v line to a corner and decided to re arrenge the cables a bit now the video grabber is recognized and all comands work fine with it except i get a black image

 

Hello guys, I have the same problem at the moment. Does anyone has a solution?