Beiträge von David Hequet

Are the color redish in video preview or just the leds?

Maybe youre leds are not well calibrated.

You can do it by applying a color via web ui and calibrate through image processing

Need some paint

Improvement!

I replaced the big white box with a custom wooden box

with backdoor

the large wooden plank is wedged between the parquet and the wall (almost) preventing everything from moving

before playing with led layoutAnd like any super villain i have my secret button

yes, some yellow or green. In my case with leds far from the wall it's ok.

webcam as grabber

Zitat von Goose1451

Will I lose any arc or cec capabilities?

Probably, if your AVR has two simultanate output i recommand you to use it to avoid lose of HDMI capabilities.

are you using a good power supply with your pi4? Maybe there is a power loss that fail the capture card.

You can test your capture card on your computer with (exemple with OBS Studio https://obsproject.com/download )

Here is my setup

- pi zero

- logitech c270 camera

- apa102 (only 80 leds)

- 4 meters cable between leds and pi zero

- woodeen frame

All made of spare part, on my older TV i had an hyperion setup with pi zero, usb grabber + splitter.

I changed because of two reasons

1. new TV, PS5, HDMI 2.1 : i didn't want compromise on HDMI flux and cheap 2.1 splitters doesn't exist
2. Always add problems. sometimes grabber or splitter stop working for a second or mire. I restarded Hyperion instance 3 times a day. Sometime image stopped from beeing on TV

A wooden frame, pi zero in the old box containing all grabbers/splitters, hdmi cables.. He has planty of room now

Why the frame? Because ma TV is far from the wall (my room looks like a slice of pizza)

With the frame the lefty led strip can light up the left wall

Say hello to the camera

The green button switch on/off the system

The cable from pi to leds is hiddent between the floor and the wall. But it works with ESP8266 too.

Honestly, I thought the result would be "blah" and I am pleasantly surprised :

Next step :

• Replace the big white box with a small wood box to fit pi zero + webcam
• Bring the button closer to the couch avoid moving the camera by error when swichting off

More infos here (camera tweaks, long cable):

Thema

Adjust Camera in Hyperion - Color - Help required

Dear Friends,
I try to setup Hyperion with my Pi Cam, but I have issues calibrating. I took a picture to show the problem on a white screen.
Due to capturing the screen image via camera and the viewing angle the camera detects a certain "gradient" where it should be white.
I mean I can related why this happens but I dont know if I can compensate it.

Is there any option in hyperion how to correct for this or any other suggestions? Is the Camera the problem?

Any help would be appreciated.

piperion

12. März 2021

Not cutting the led strip, good idea i like it

i added saturation to my changes:

saturation = 40

gain = 40

exposure_auto = 1 (1 mean manual)

exposure_auto_priority = 0

exposure_absolute = 160

Beitrag

Restart Hyperion.NG on plug in the USB grabber

Maybe will be useful for someone:

System: Hyperion.NG running on Raspberry Pi 3 b+, Raspbian OS, USB capture device
Problem: if USB graber is plugged off and then again plugged in, then the hyperion does not get video signal and ambilight does not work.
Solution Idea: restart aitomatically hyperion service if USB graber plugged in. Use udev for that...
Solution implementation:
1) Make new udev rule:
1.1) Execute command:
(Quelltext, 1 Zeile)


1.2) In the nano editor insert the rule line like this…

wladi

22. Dezember 2020

Hi, i didn't tried the solution mentionned above because i switched from a disconneting grabber to webcam as input device.

Video from last night, switching to camera was a good idea

luchow3cu setting saturation was a good idea, my C270 settings from v4l2-ctl -L command:

                     brightness 0x00980900 (int)    : min=0 max=255 step=1 default=128 value=128
                       contrast 0x00980901 (int)    : min=0 max=255 step=1 default=32 value=32
                     saturation 0x00980902 (int)    : min=0 max=255 step=1 default=32 value=40
 white_balance_temperature_auto 0x0098090c (bool)   : default=1 value=1
                           gain 0x00980913 (int)    : min=0 max=255 step=1 default=64 value=40
           power_line_frequency 0x00980918 (menu)   : min=0 max=2 default=2 value=2
                                0: Disabled
                                1: 50 Hz
                                2: 60 Hz
      white_balance_temperature 0x0098091a (int)    : min=0 max=10000 step=10 default=4000 value=6760 flags=inactive
                      sharpness 0x0098091b (int)    : min=0 max=255 step=1 default=24 value=24
         backlight_compensation 0x0098091c (int)    : min=0 max=1 step=1 default=0 value=0
                  exposure_auto 0x009a0901 (menu)   : min=0 max=3 default=3 value=1
                                1: Manual Mode
                                3: Aperture Priority Mode
              exposure_absolute 0x009a0902 (int)    : min=1 max=10000 step=1 default=166 value=165
         exposure_auto_priority 0x009a0903 (bool)   : default=0 value=0

i will make a new video of the result tonight

L'autre solution possible, moins précise niveaux couleurs, mais ne dégradant pas le signal HDMI est d'utiliser une webcam connectée au pi zéro pour filmer l'écran.

C'est la solution que j'ai mis en place depuis une semaine, j'ajuste encore un peu les paramètres de la caméra mais j'en suis super content!

Quelques photos et vidéo (j'ai une calibration de mieux en mieux la)

Beitrag

RE: Adjust Camera in Hyperion - Color - Help required

I finished my installation!

I'm trying to find the best camera settings for movies at night, and yes, there is color wash between bright/dark scene.

I think the camera can't be configured for both scene.

In my case it will be enough since my priority is on screen image. And my TV stand far from (an "elephant grey") wall leds lights will be mixed when they hit the wall. Acurate colors is very difficult in my case. Plus i add 25% backlight in my config. Leds never stop



you can see results on dark…

David Hequet

19. April 2021

Si je n'avais pas la possibilité de cacher le câble entre le pi et les leds j'aurai utilisé un esp32. Enfin peuit-être que je modifierai ca quand j'aurai envi de bricoler de nouveau

dave c'est compliqué l'ESP32 ? Tu aurais un tuto quelquepart? Merci

Yyes, no issue with refresh rate too.

Oh, I didn't see that saturation can go over 32 (my mind read the default value as max

I think my camera is C270 too, we can share our good idea :p

Tonight i will try your settings

luchow3cu very nice result too! Did you keep the camera default setting (auto exposure..) ?

i can see no lag from the esp8266! Luckily i have a place to hide the cable from pi to led so i don't need it

Zitat von Obaldius

Do you believe it could work witha 4-5 meters distance?

thanks guys

I think it can work, but the camera will capture a large zone and more light arround the TV.

So switching between bright/dark scene will take more time.

And i think you will need higher camera resolution (used 320*240 in my case)

If you have a raspberry pi and a spare webcam you can give it a try without led :

• install hyperion
• plug the camera
• virtually add led to hyperion config / configure the layout to match your tv place
  • like this : msg from page 1
• Use the video preview from hyperion to see what happen and how leds react to image
  • Play with camera parameters from ssh command interface
  • V4l2-ctl -L list your camera adjustable parameters
  • Example to adjust camera brightness : v4l2-ctl --set-ctrl=brightness=150
  • Default parameters are loaded on systeme startup
  • Follow this to set your parameters on startup/camera plug : https://askubuntu.com/a/958927/1215945
• If you think that the camera see your TV good enough, buy the leds

Hyperion.ng made testing much more useable than the older hyperion+hypercon. you can try lots of config

I think you can even try just with hyperion on windows if you don't have a pi.

I finished my installation!

I'm trying to find the best camera settings for movies at night, and yes, there is color wash between bright/dark scene.

I think the camera can't be configured for both scene.

In my case it will be enough since my priority is on screen image. And my TV stand far from (an "elephant grey") wall leds lights will be mixed when they hit the wall. Acurate colors is very difficult in my case. Plus i add 25% backlight in my config. Leds never stop

you can see results on dark scene here :

https://youtu.be/1NhSNdxoXkQ

https://youtu.be/jyh6tAEyC6M

Colors are betters in real life than the footages from my phone, i filmed what the camera preview from hyperion is seeing too.

Basic idea :

• Spare webcam with pi zero at approx 2 meters from the TV
• Long cable from pi zero to leds
• Leds not glued to tv but on a wood frame put on the TV stand (my TV has a 15° angle with the wall)

Why camera:

• Bad experience with grabber disconnecting, bad hdmi connexion..
• Don't want to compromise on HDR/SDR, 2.1 HDMI with ps5..

what i tested:

• webcam with pi 3 at approx 2 meters from my old TV with glued leds from previous grabber Hyperion installation using the long webcam's usb cable
  • Worked like a charme but was not very WAF
  • Didn't notice lag (but just tried one night)
  • Colors were not as accurate as grabber solution
• tested a long 3 meters cable between pi3 and leds controlling led via web app
  • Works great too
  • source: RE: Distance between Pi and LED-Strip

Need to

• Build the frame
• unglue leds and make rebuild bigger "rectangle" (switched from 50" TV to 55")
• Test another spare webcam with pi zero
• put webcam and pi zero together in a box
• hide the long cable
• some color calibration (but i don't need super accuracy)
• enjoy

Ambivision seems good, but i have a lot of spare part to use

Yes, i tested with an old webcam on a movie night, seem better than pi camera for that too. Didn't notice the delay.

I used chinese splitter/grabber and worked like a charm too, but with time splitter and/or grabber randomly stop.

Now i have an HDR TV + PS5 and i think i will build my setup with the webcam (wich need some calibrating too) instead of degrading the TV signal.

Thank you

piperion did you manage the calibrating process? If so, how did you do? v4l2-ctrl script at startup?

Just tried with au webcam. It is not as bad as expected ! I Will try with the pi cam to compare. I think i can live with not so acurate colorand use it as daily driver. I had too much problems with grabber stop working, bad wire connections between splitter, micro usb power lose, etc..