use "re" option add global real time grab

like ffmpeg
wangxi761 · Jun 4, 2021 · 6838c85 · 6838c85
1 parent 9b6e4ce
commit 6838c85
Showing 1 changed file with 9 additions and 6 deletions.
diff --git a/src/main/java/org/bytedeco/javacv/FFmpegFrameGrabber.java b/src/main/java/org/bytedeco/javacv/FFmpegFrameGrabber.java
@@ -56,10 +56,7 @@
 import java.io.InputStream;
 import java.nio.Buffer;
 import java.nio.ByteBuffer;
-import java.util.Collections;
-import java.util.EnumSet;
-import java.util.HashMap;
-import java.util.Map;
+import java.util.*;
 import java.util.Map.Entry;
 import org.bytedeco.javacpp.BytePointer;
 import org.bytedeco.javacpp.DoublePointer;
@@ -389,6 +386,7 @@ static class SeekCallback extends Seek_Pointer_long_int {
     private boolean         frameGrabbed;
     private Frame           frame;
 	private long            startTime;
+	private boolean         globalAtFrameRate;
     private volatile boolean started = false;
 
     public boolean isCloseInputStream() {
@@ -850,6 +848,11 @@ public void startUnsafe() throws Exception {
         startUnsafe(true);
     }
     public synchronized void startUnsafe(boolean findStreamInfo) throws Exception {
+	    String reValue = this.getOption("re");
+	    if (Objects.equals(reValue,"true")) {
+		    this.globalAtFrameRate = true;
+	    }
+
         try (PointerScope scope = new PointerScope()) {
 
         if (oc != null && !oc.isNull()) {
@@ -1052,7 +1055,7 @@ public synchronized void startUnsafe(boolean findStreamInfo) throws Exception {
             samples_buf = new Buffer[] { null };
         }
         started = true;
-
+        
         }
     }
 
@@ -1454,7 +1457,7 @@ private synchronized Frame _grabFrame(boolean doAudio, boolean doVideo, boolean
 		    }
 
 		    //  Simulate the "-re" parameter in ffmpeg
-		    if (atFrameRate) {
+		    if (atFrameRate||globalAtFrameRate) {
 			    if (startTime == 0) {
 				    startTime = System.currentTimeMillis();
 			    } else {