fix tests

internal/core/rtsp_source_test.go

@@ -269,7 +269,7 @@ func TestRTSPSourceDynamicH264Params(t *testing.T) {
 	require.NoError(t, err)
 	stream.WritePacketRTP(0, pkts[0], true)
 
-	time.Sleep(1 * time.Second)
+	time.Sleep(500 * time.Millisecond)
 
 	func() {
 		c := gortsplib.Client{}
@@ -298,6 +298,8 @@ func TestRTSPSourceDynamicH264Params(t *testing.T) {
 	require.NoError(t, err)
 	stream.WritePacketRTP(0, pkts[0], true)
 
+	time.Sleep(500 * time.Millisecond)
+
 	func() {
 		c := gortsplib.Client{}