Add option to ignore encoder probe failure

src/process.cpp

@@ -353,7 +353,11 @@ namespace proc {
     // due to hotplugging, driver crash, primary monitor change,
     // or any number of other factors).
     if (rtsp_stream::session_count() == 0 && video::probe_encoders()) {
-      return 503;
+      if (config::video.ignore_encoder_probe_failure) {
+        BOOST_LOG(warning) << "Encoder probe failed, but continuing due to user configuration.";
+      } else {
+        return 503;
+      }
     }
 
     std::string fps_str;