tried (and failed) to get a white rectangle placeholder drawing, also streaming btw

project/bin/gdvapi.gdextension

@@ -3,4 +3,5 @@ entry_symbol = "gdvapi_library_init"
 compatibility_minimum = "4.7"
 
 [libraries]
-linux.x86_64 = "res://bin/linux/gdvapi.linux.template_debug.x86_64.so"
+linux.editor.x86_64 = "res://bin/linux/gdvapi.linux.editor.x86_64.so"
+linux.template_debug.x86_64 = "res://bin/linux/gdvapi.linux.template_debug.x86_64.so"

project/example.gd

@@ -2,4 +2,5 @@ extends Node
 
 
 func _ready() -> void:
-	$FileVideoStream.begin("res://badapple.mov")
+	#$GDVAPIVideoStream.begin("udp://0.0.0.0:5000")
+	pass

project/example.tscn

@@ -5,4 +5,6 @@
 [node name="Node" type="Node" unique_id=2080300232]
 script = ExtResource("1_jdh55")
 
-[node name="FileVideoStream" type="FileVideoStream" parent="." unique_id=330752336]
+[node name="GDVAPIVideoStream" type="GDVAPIVideoStream" parent="." unique_id=1053894928]
+offset_right = 40.0
+offset_bottom = 40.0

project/export_presets.cfg

@@ -0,0 +1,49 @@
+[runnable_presets]
+
+Linux="Linux"
+
+[preset.0]
+
+name="Linux"
+platform="Linux"
+dedicated_server=false
+custom_features=""
+export_filter="all_resources"
+include_filter=""
+exclude_filter=""
+export_path="exports/godot cpp template.x86_64"
+patches=PackedStringArray()
+patch_delta_encoding=false
+patch_delta_compression_level_zstd=19
+patch_delta_min_reduction=0.1
+patch_delta_include_filters="*"
+patch_delta_exclude_filters=""
+encryption_include_filters=""
+encryption_exclude_filters=""
+seed=0
+encrypt_pck=false
+encrypt_directory=false
+script_export_mode=2
+
+[preset.0.options]
+
+custom_template/debug=""
+custom_template/release=""
+debug/export_console_wrapper=1
+binary_format/embed_pck=false
+texture_format/s3tc_bptc=true
+texture_format/etc2_astc=false
+shader_baker/enabled=false
+binary_format/architecture="x86_64"
+ssh_remote_deploy/enabled=false
+ssh_remote_deploy/host="user@host_ip"
+ssh_remote_deploy/port="22"
+ssh_remote_deploy/extra_args_ssh=""
+ssh_remote_deploy/extra_args_scp=""
+ssh_remote_deploy/run_script="#!/usr/bin/env bash
+export DISPLAY=:0
+unzip -o -q \"{temp_dir}/{archive_name}\" -d \"{temp_dir}\"
+\"{temp_dir}/{exe_name}\" {cmd_args}"
+ssh_remote_deploy/cleanup_script="#!/usr/bin/env bash
+pkill -x -f \"{temp_dir}/{exe_name} {cmd_args}\"
+rm -rf \"{temp_dir}\""

project/exports/godot cpp template.sh

@@ -0,0 +1,4 @@
+#!/bin/sh
+printf '\033c\033]0;%s\a' godot cpp template
+base_path="$(dirname "$(realpath "$0")")"
+"$base_path/godot cpp template.x86_64" "$@"

project/project.godot

@@ -18,3 +18,8 @@ config/name="godot cpp template"
 run/main_scene="uid://dh0oj81pufivs"
 config/features=PackedStringArray("4.7", "Forward Plus")
 config/icon="res://icon.svg"
+
+[display]
+
+window/size/viewport_width=1920
+window/size/viewport_height=1080