enable better FPS skipping mechanism. For raspberry , optimal at 10 fps.

Html/html/index.html

@@ -59,20 +59,20 @@
                             <div class="col">
                                 <div class="d-flex align-items-center">
                                     <span class="fa-solid fa-microchip icon-system"></span>
-                                    <p id="cpu_usage" class="padleft">100 %</p>
+                                    <p id="cpu_usage" class="padleft">0 %</p>
                                 </div>
                             </div>
 
                             <div class="col">
                                 <div class="d-flex align-items-center">
                                     <span class="fa-solid fa-temperature-half icon-system"></span>
-                                    <p id="cpu_temperature" class="padleft">55 °C</p>
+                                    <p id="cpu_temperature" class="padleft">0 °C</p>
                                 </div>
                             </div>
                             <div class="col">
                                 <div class="d-flex align-items-center">
                                     <span class="fa-solid fa-memory icon-system"></span>
-                                    <p id="ram_usage" class="padleft">15 %</p>
+                                    <p id="ram_usage" class="padleft">0 %</p>
                                 </div>
                             </div>
 

src/main/java/Camera/GrabbingTask.java

@@ -12,17 +12,26 @@ import org.bytedeco.javacv.FrameGrabber;
 import org.tinylog.Logger;
 
 public class GrabbingTask implements Runnable {
+    // for while loop control
+    private final AtomicBoolean isGrabbing;
+    // for grabbing frames
+    private final FrameGrabber grabber;
+
+    // Consumers
     @Setter private Consumer<String> onMessageUpdate;
     @Setter private Consumer<Frame> onHQFrameUpdate;
     @Setter private Consumer<Frame> onLQFrameUpdate;
     @Setter private Consumer<String> onHQBase64Update;
     @Setter private Consumer<String> onLQBase64Update;
+
+    // status of capture fps
     @Getter private int CaptureFPS = 0;
 
-    private final AtomicBoolean isGrabbing;
+    @Getter @Setter private int lowquality_width = 640;
-    private final FrameGrabber grabber;
+    @Getter @Setter private int lowquality_height = 360;
-    @Getter private final int lowquality_width = 640;
+
-    @Getter private final int lowquality_height = 360;
+    // for FPS calculation
+    private int intendedFps = 10;
 
     private void updateMessage(String message) {
         if (onMessageUpdate != null) {
@@ -62,10 +71,10 @@ public class GrabbingTask implements Runnable {
 
 
 
-    public GrabbingTask(AtomicBoolean isGrabbing, FrameGrabber grabber) {
+    public GrabbingTask(AtomicBoolean isGrabbing, FrameGrabber grabber, int fps) {
         this.isGrabbing = isGrabbing;
         this.grabber = grabber;
-
+        if (fps>0) intendedFps = fps;
     }
 
 
@@ -73,39 +82,51 @@ public class GrabbingTask implements Runnable {
         isGrabbing.set(false);
     }
 
-    private void grabprocess() throws Exception{
+    private void processFrame(Frame fr){
-        grabber.flush();
-        Frame fr =grabber.grab();
-
         if (fr!=null){
             updateHQFrame(fr);
             updateHQBase64(SomeCodes.FrameToBase64(fr));
             Frame resized = SomeCodes.ResizeFrame(fr, lowquality_width, lowquality_height);
             updateLQFrame(resized);
             updateLQBase64(SomeCodes.FrameToBase64(resized));
-        } else updateMessage("Grabber returned null frame");
+        } else updateMessage("processFrame have null frame");
     }
 
+    private void flush_grabber(){
+        try {
+            if (grabber!=null) grabber.flush();
+        } catch (FrameGrabber.Exception e) {
+            Logger.error("Error flushing grabber: "+e.getMessage());
+        }
+    }
 
     @Override
     public void run() {
         isGrabbing.set(true);
         Logger.info("Grabbing Task started");
         double fps = grabber.getFrameRate();
-        Logger.info("Grabber framerate = {}", fps);
+        int skippedframes = (int)(fps / intendedFps);
+        //Logger.info("Grabber framerate = {}, intendedFps = {}, Skipping frames = {}", fps, intendedFps, skippedframes);
+        int framecount = 0;
+        flush_grabber();
         long starttick = System.currentTimeMillis();
         while (isGrabbing.get()) {
-
-            long elapsed = System.currentTimeMillis() - starttick;
-            starttick = System.currentTimeMillis();
-            //Logger.info("Elapsed time = {} ms", elapsed);
-            if (elapsed>0) CaptureFPS = (int) (1000 / elapsed);
             try{
                 Thread.yield();
-                grabprocess();
+                Frame frame = grabber.grab();
+                if (framecount<Integer.MAX_VALUE) framecount++; else framecount = 0;
+                if (framecount % skippedframes == 0) processFrame(frame);
             } catch (Exception e){
                 Logger.error("Error grabbing frame: "+e.getMessage());
             }
+
+            long elapsed = System.currentTimeMillis() - starttick;
+            starttick = System.currentTimeMillis();
+            if (elapsed>0) {
+                int xx = (int) (1000 / elapsed);
+                if (xx<fps) CaptureFPS = xx;
+            }
+            //Logger.info("Elapsed time = {} ms, captureFPS = {}", elapsed, CaptureFPS);
         }
         Logger.info("Grabbing Task stopped");
     }

src/main/java/Camera/RtspGrabber.java

@@ -3,12 +3,14 @@ import lombok.Getter;
 import org.bytedeco.ffmpeg.global.avutil;
 import org.bytedeco.javacv.FFmpegFrameGrabber;
 import org.bytedeco.javacv.Frame;
+import org.jetbrains.annotations.NotNull;
 import org.tinylog.Logger;
 
 import java.util.concurrent.atomic.AtomicBoolean;
 
 import static Other.SomeCodes.gson;
 
+@SuppressWarnings("unused")
 public class RtspGrabber {
     private final String rtspUrl;
     private FFmpegFrameGrabber grabber;
@@ -69,40 +71,17 @@ public class RtspGrabber {
         try{
             grabber = FFmpegFrameGrabber.createDefault(rtspUrl);
             if (useTcp) grabber.setOption("rtsp_transport", "tcp");
-            grabber.setTimeout(2000);
+            // automatic by RTSP
-            grabber.setImageWidth(width);
+            //grabber.setImageWidth(width);
-            grabber.setImageHeight(height);
+            //grabber.setImageHeight(height);
+            //grabber.setTimeout(2000);
             grabber.setPixelFormat(avutil.AV_PIX_FMT_BGR24);
             grabber.start();
 
             avutil.av_log_set_level(avutil.AV_LOG_ERROR);
 
-
-
             Logger.info("Grabber started");
-            GrabbingTask tt = new GrabbingTask(isGrabbing, grabber);
+            GrabbingTask tt = getGrabbingTask();
-            tt.setOnMessageUpdate(Logger::info);
-            tt.setOnHQFrameUpdate(value -> {
-                if (value!=null){
-                    if (value.imageWidth>0 && value.imageHeight>0){
-                        setLastHQFrame(value);
-                        HQWidth = value.imageWidth;
-                        HQHeight = value.imageHeight;
-                    }
-
-                }
-            });
-            tt.setOnLQFrameUpdate(value -> {
-                if (value!=null){
-                    if (value.imageWidth>0 && value.imageHeight>0){
-                        setLastLQFrame(value);
-                        LQWidth = value.imageWidth;
-                        LQHeight = value.imageHeight;
-                    }
-                }
-            });
-            tt.setOnHQBase64Update(this::setLastHQBase64);
-            tt.setOnLQBase64Update(this::setLastLQBase64);
             grabbingTask = tt;
             new Thread(tt).start();
 
@@ -111,6 +90,8 @@ public class RtspGrabber {
         }
     }
 
+
+
     /**
      * Stop grabbing frames
      */
@@ -139,4 +120,32 @@ public class RtspGrabber {
     public String HQStreamingStatus(){
         return gson.toJson(new String[]{String.valueOf(HQWidth), String.valueOf(HQHeight) , String.valueOf(grabbingTask.getCaptureFPS())});
     }
+
+    @NotNull
+    private GrabbingTask getGrabbingTask() {
+        GrabbingTask tt = new GrabbingTask(isGrabbing, grabber,10);
+        tt.setOnMessageUpdate(Logger::info);
+        tt.setOnHQFrameUpdate(value -> {
+            if (value!=null){
+                if (value.imageWidth>0 && value.imageHeight>0){
+                    setLastHQFrame(value);
+                    HQWidth = value.imageWidth;
+                    HQHeight = value.imageHeight;
+                }
+
+            }
+        });
+        tt.setOnLQFrameUpdate(value -> {
+            if (value!=null){
+                if (value.imageWidth>0 && value.imageHeight>0){
+                    setLastLQFrame(value);
+                    LQWidth = value.imageWidth;
+                    LQHeight = value.imageHeight;
+                }
+            }
+        });
+        tt.setOnHQBase64Update(this::setLastHQBase64);
+        tt.setOnLQBase64Update(this::setLastLQBase64);
+        return tt;
+    }
 }

src/main/java/id/co/gtc/Main.java

@@ -51,11 +51,11 @@ public class Main {
         init_properties();
         init_audiofiles();
 
+        init_Vapix();
         init_audio();
+        init_pantiltcontroller();
         init_webserver();
         init_rtspgrabber();
-        init_pantiltcontroller();
-        init_Vapix();
     }
 
     private static void init_system_monitoring(){