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--- products:sbc:vim4:applications:hdmi-input-5.15 [2023/09/01 04:04]
nick created
+++ products:sbc:vim4:applications:hdmi-input-5.15 [2024/11/25 08:50] (current)
nick
@@ Line 1: / Line 1: @@
-====== VIM4 HDMI Input ======
+====== VIM4 HDMI Input for 5.15 Kernel ======
-===== Introduction =====
+<WRAP important >
+This documentation is only for Linux system.
+</WRAP>
-This documentation will introduce the usage of HDMI Input.
+===== Hardware Connection =====
-===== Preparation =====
+  * Connect your VIM4 HDMI Out to an HDMI Display
+  * Connect your HDMI OUT cable to VIM4 HDMI IN port
-**HDMI input preview can only work under framebuffer console**, so you need to use the server image, you can install via OOWOW.
+<WRAP important >
+You must connect your VIM4 to a workablbe HDMI screen or the HDMI IN will not working.
+</WRAP>
-If you use the desktop image, you need to switch to the framebuffer console.
+===== Capture the HDMI IN Frames =====
+You can use gstreamer to capture the HDMI IN frames. Here is en example to capture the HDMI IN frames
+and encoding them to ''H264'' format and mux to ''MP4'' format store in file ''/tmp/test71.mp4''.
 ```shell
-sudo chvt 3
+gst-launch-1.0 v4l2src device=/dev/video71 io-mode=dmabuf num-buffers=300 ! video/x-raw,format=NV12,width=1920,height=1080,framerate=30/1,interlace-mode=interleaved ! amlvenc ! h264parse ! qtmux ! filesink location=/tmp/test71.mp4
-echo 1 | sudo tee /sys/class/graphics/fb0/blank
-echo 0 | sudo tee /sys/class/graphics/fb0/blank
 ```
-<WRAP tip >
+/*
-If you want to go back to the desktop ''sudo chvt 2''
-</WRAP>
+===== Preview the HDMI IN Frames on Gnome Desktop =====
-===== Install HDMI Input Demo =====
+You can use gstreamer plugin ''clutterautovideosink'' to preview the HDMI IN frames on the Gnome desktop.
 ```shell
-sudo apt update
+gst-launch-1.0 v4l2src device=/dev/video71 io-mode=dmabuf ! video/x-raw,format=NV12,width=1920,height=1080,framerate=30/1,interlace-mode=interleaved ! clutterautovideosink
-sudo apt install hdmiin-demo
 ```
+<WRAP tip >
+  * You can use ''Alt+F7'' to select the window and move mouse to move the window.
+  * It doesn't support fullscreen mode.
+</WRAP>
-===== Test =====
+*/
-  * Connect your VIM4 HDMI Out to an HDMI Display
+===== Preview the HDMI IN Frames on Framebuffer Console =====
-  * Connect your HDMI OUT cable to VIM4 HDMI IN port
-  * Execute the HDMI Input demo command ''sudo hdmiin-demo''
+**HDMI input preview can only work under framebuffer console**, so you need to use the server image, you can install via OOWOW.
+If you use the desktop image, you need to switch to the framebuffer console.
+Press ''Ctrl + Alt + F3'' to switch to the framebuffer console and **use ''root'' to login**.
+<WRAP important >
+You must use ''root'' to login or the audio may not working on Ubuntu 24.04.
+</WRAP>
+<WRAP tip >
+If you want to go back to the desktop press ''Ctrl + Alt + F1''.
+</WRAP>
+==== Test ====
+Execute the HDMI Input demo command ''sudo hdmiin-demo''
 If everything is OK you will see the HDMI Input source on your display.
-===== Known Issues =====
+==== Troubleshooting ====
+** No audio for ''sudo hdmiin-demo'': **
+If you use the Ubuntu 24.04 desktop image, when you login with the normal user ''khadas'', the audio may not work, there are two solutions to
+fix this issue:
+. Use the server image and use ''root'' to login
+. If you use the desktop image, you need to press ''Ctrl + Alt + F3'' to switch to framebuffer console and **use ''root'' to login**
+<WRAP tip >
+If you want to go back to the desktop press ''Ctrl + Alt + F1''.
+</WRAP>

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