Automatically use virtual display if no active display is detected

src/process.cpp

@@ -223,7 +223,12 @@ namespace proc {
     });
 
 #ifdef _WIN32
-    if (config::video.headless_mode || launch_session->virtual_display || _app.virtual_display) {
+    if (
+      config::video.headless_mode        // Headless mode
+      || launch_session->virtual_display // User requested virtual display
+      || _app.virtual_display            // App is configured to use virtual display
+      || !video::allow_encoder_probing() // No active display presents
+    ) {
       if (vDisplayDriverStatus != VDISPLAY::DRIVER_STATUS::OK) {
         // Try init driver again
         initVDisplayDriver();

src/video.cpp

@@ -41,7 +41,6 @@ using namespace std::literals;
 
 namespace video {
 
-  namespace {
   /**
    * @brief Check if we can allow probing for the encoders.
    * @return True if there should be no issues with the probing, false if we should prevent it.
@@ -70,7 +69,6 @@ namespace video {
     BOOST_LOG(error) << "No display devices are active at the moment! Cannot probe the encoders.";
     return false;
   }
-  }  // namespace
 
   void free_ctx(AVCodecContext *ctx) {
     avcodec_free_context(&ctx);

src/video.h

@@ -349,6 +349,12 @@ namespace video {
 
   bool validate_encoder(encoder_t &encoder, bool expect_failure);
 
+  /**
+   * @brief Check if we can allow probing for the encoders.
+   * @return True if there should be no issues with the probing, false if we should prevent it.
+   */
+  bool allow_encoder_probing();
+
   /**
    * @brief Probe encoders and select the preferred encoder.
    * This is called once at startup and each time a stream is launched to