Problem with --led-chain

[grthor]

Hi,
my goal is to stream videos via VLC to an LED matrix, but I have encountered a problem that I can't get fixed.

If I run

root@raspberrypi:~/home/pi/flaschen-taschen/server $ ./ft-server --led-rows=32 --led-cols=64 
--led-chain=8 --led-parallel=2 --led-pixel-mapper "U-mapper"

the led matrix stays black. If I run [changed --led-chain=8 to --led-chain=4]

root@raspberrypi:~/home/pi/flaschen-taschen/server $ ./ft-server --led-rows=32 --led-cols=64 
--led-chain=4 --led-parallel=2 --led-pixel-mapper "U-mapper"

the led panels light up and show the video. I changed --led-chain=4 to --led-chain=6 and the led-panels turn black again.
Depending on the led chain length something is displayed or not.

Here are some facts about my setup

• I use 16 32x64 pixel LED modules with the following mapping:

   [<][<][<][<]  }--- Pi connector #1
   [>][>][>][>]
   [<][<][<][<]  }--- Pi connector #2
   [>][>][>][>]

• For wiring I use an Active-3 breakout board.
• The setup works. I can run examples from rpi-rgb-led-matrix/examples-api-use. All panels show the correct content.
• I use an RPi 4 with Raspbian lite.

I hope this helps solving the problem. If you need any further information i try to answer asap.

Best regards
Thorben

[meikel-k]

I have the same problem, same setup and starting the server

The server starts with resolution 256x128
If I setup VLC -Video Flaschen , with width 256 and height 128 the Display keeps black,
Trying to setup VLC Flaschen with width 256 and height 64 it works but only shows on channel 1 the first two display rows.
Other apps like video-viewer or image viewer uses the whole display.

How can I get VLC stream with height above 64 pixel

[hzeller]

This sounds similar to #61 - essentially the default VLC has a limit in size of the image, but in the issue mentioned there is a link to a modified fork of VLC which allows larger images.