我不能用javafx播放视频
我无法使用MediaPlayer在JavaFX中播放mp4视频。 它抛出以下异常:我不能用javafx播放视频,javafx,media-player,Javafx,Media Player,我无法使用MediaPlayer在JavaFX中播放mp4视频。 它抛出以下异常: MediaException: UNKNOWN : [com.sun.media.jfxmediaimpl.platform.gstreamer.GSTMediaPlayer@1ae76b31] ERROR_MEDIA_INVALID: ERROR_MEDIA_INVALID 而且,当我使用从oracle网站下载的flv文件时,没有播放任何内容,也没有抛出任何内容 为什么以及如何解决这个问题 另一个信息是: j
MediaException: UNKNOWN : [com.sun.media.jfxmediaimpl.platform.gstreamer.GSTMediaPlayer@1ae76b31] ERROR_MEDIA_INVALID: ERROR_MEDIA_INVALID
而且,当我使用从oracle网站下载的flv文件时,没有播放任何内容,也没有抛出任何内容
为什么以及如何解决这个问题
另一个信息是:
java版本“1.8.0_251”
Java(TM)SE运行时环境(build1.8.0_251-b08)
Java HotSpot(TM)64位服务器虚拟机(构建25.251-b08,混合模式)
5.4.0-45-generic#49 Ubuntu SMP周三8月26日13:38:52 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
打包高级媒体;
导入java.io.File;
导入javafx.application.application;
导入javafx.application.Platform;
导入javafx.beans.InvalizationListener;
导入javafx.beans.Observable;
导入javafx.beans.value.ChangeListener;
导入javafx.beans.value.observeValue;
导入javafx.event.ActionEvent;
导入javafx.event.EventHandler;
导入javafx.geometry.Insets;
导入javafx.geometry.Pos;
导入javafx.scene.Group;
导入javafx.scene.scene;
导入javafx.scene.control.Button;
导入javafx.scene.control.ButtonBuilder;
导入javafx.scene.control.control;
导入javafx.scene.control.Label;
导入javafx.scene.control.LabelBuilder;
导入javafx.scene.control.Slider;
导入javafx.scene.control.SliderBuilder;
导入javafx.scene.image.image;
导入javafx.scene.image.ImageView;
导入javafx.scene.layout.BorderPane;
导入javafx.scene.layout.HBox;
导入javafx.scene.layout.Pane;
导入javafx.scene.layout.Priority;
导入javafx.scene.layout.Region;
导入javafx.scene.media.media;
导入javafx.scene.media.MediaPlayer;
导入javafx.scene.media.MediaPlayer.Status;
导入javafx.scene.media.MediaView;
导入javafx.stage.stage;
导入javafx.util.Duration;
/**
*高级媒体播放器,具有播放/暂停、搜索和音量控制。
*
*@see javafx.scene.media.MediaPlayer
*@see javafx.scene.media.media
*/
公共类AdvancedMedia扩展应用程序{
私有静态最终字符串MEDIA_URL=新文件(“/Path/to/video/File.flv”).toURI().toASCIIString();
私人媒体播放器;
私有void init(阶段primaryStage){
组根=新组();
primaryStage.setScene(新场景(根));
mediaPlayer=新mediaPlayer(新媒体(媒体URL));
mediaPlayer.setAutoPlay(true);
MediaControl=新的MediaControl(mediaPlayer);
mediaControl.setMinSize(480280);
mediaControl.setPrefSize(480280);
mediaControl.setMaxSize(480280);
root.getChildren().add(mediaControl);
mediaPlayer.setOnError(新的Runnable(){
@凌驾
公开募捐{
System.out.println(mediaPlayer.getError());
}
});
}
公共游戏{
Status Status=mediaPlayer.getStatus();
if(status==status.UNKNOWN
||状态==状态。已暂停){
//System.out.println(“玩家状态不好或未知,无法播放”);
返回;
}
if(status==status.PAUSED
||status==status.STOPPED
||状态==状态。就绪){
mediaPlayer.play();
}
}
@凌驾
公共停车场(){
mediaPlayer.stop();
}
公共类MediaControl扩展了BorderPane{
私人媒体播放器;
私有媒体视图;
私有最终布尔重复=false;
私有布尔stopRequested=false;
私有布尔值atEndOfMedia=false;
私人期限;
专用滑条时间滑块;
自有品牌游戏时间;
私人滑杆滑杆;
私人HBox mediaBar;
私有最终图像PlayButtonImage=新图像(AdvancedMedia.class.getResourceAsStream(“playbutton.png”);
私有最终图像PauseButtonImage=新图像(AdvancedMedia.class.getResourceAsStream(“pausebutton.png”);
ImageView imageViewPlay=新的ImageView(播放按钮图像);
ImageView imageViewPause=新图像视图(PauseButtonImage);
专用窗格;
私人舞台新闻舞台;
私有布尔全屏=假;
@凌驾
受保护的void layoutChildren(){
if(mediaView!=null&&getBottom()!=null){
setFitWidth(getWidth());
setFitHeight(getHeight()-getBottom().prefHeight(-1));
}
super.layoutChildren();
if(mediaView!=null&&getCenter()!=null){
setTranslateX(((窗格)getCenter()).getWidth()-mediaView.prefWidth(-1))/2);
mediaView.setTranslateY(((窗格)getCenter()).getHeight()-mediaView.prefHeight(-1))/2);
}
}
@凌驾
受保护的双计算最小宽度(双高度){
返回mediaBar.prefWidth(-1);
}
@凌驾
受保护的双计算重量(双倍宽度){
返回200;
}
@凌驾
受保护的双computePrefWidth(双高){
返回Math.max(mp.getMedia().getWidth(),mediaBar.prefWidth(height));
}
@凌驾
受保护的双计算参考高度(双宽度){
返回mp.getMedia().getHeight()+mediaBar.prefHeight(宽度);
}
@凌驾
受保护的双computeMaxWidth(双高){
返回Double.MAX_值;
}
@凌驾
受保护的双computeMaxHeight(双倍宽度){
返回Double.MAX_值;
}
公共媒体控制(最终MediaPlayer mp){
this.mp=mp;
setStyle(“-fx背景色:#bfc2c7;”;//TODO:使用css文件
mediaView=新mediaView(mp);
mvPane=新窗格();
mvPane.getChildren().add(mediaView);
mvPane.setStyle(“-fx背景色:黑色;”;//TODO:使用css文件
国家经贸委
package advancedmedia;
import java.io.File;
import javafx.application.Application;
import javafx.application.Platform;
import javafx.beans.InvalidationListener;
import javafx.beans.Observable;
import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.geometry.Insets;
import javafx.geometry.Pos;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.ButtonBuilder;
import javafx.scene.control.Control;
import javafx.scene.control.Label;
import javafx.scene.control.LabelBuilder;
import javafx.scene.control.Slider;
import javafx.scene.control.SliderBuilder;
import javafx.scene.image.Image;
import javafx.scene.image.ImageView;
import javafx.scene.layout.BorderPane;
import javafx.scene.layout.HBox;
import javafx.scene.layout.Pane;
import javafx.scene.layout.Priority;
import javafx.scene.layout.Region;
import javafx.scene.media.Media;
import javafx.scene.media.MediaPlayer;
import javafx.scene.media.MediaPlayer.Status;
import javafx.scene.media.MediaView;
import javafx.stage.Stage;
import javafx.util.Duration;
/**
* An advanced media player with controls for play/pause, seek, and volume.
*
* @see javafx.scene.media.MediaPlayer
* @see javafx.scene.media.Media
*/
public class AdvancedMedia extends Application {
private static final String MEDIA_URL = new File("/Path/to/video/file.flv").toURI().toASCIIString();
private MediaPlayer mediaPlayer;
private void init(Stage primaryStage) {
Group root = new Group();
primaryStage.setScene(new Scene(root));
mediaPlayer = new MediaPlayer(new Media(MEDIA_URL));
mediaPlayer.setAutoPlay(true);
MediaControl mediaControl = new MediaControl(mediaPlayer);
mediaControl.setMinSize(480, 280);
mediaControl.setPrefSize(480, 280);
mediaControl.setMaxSize(480, 280);
root.getChildren().add(mediaControl);
mediaPlayer.setOnError(new Runnable() {
@Override
public void run() {
System.out.println(mediaPlayer.getError());
}
});
}
public void play() {
Status status = mediaPlayer.getStatus();
if (status == Status.UNKNOWN
|| status == Status.HALTED) {
//System.out.println("Player is in a bad or unknown state, can't play.");
return;
}
if (status == Status.PAUSED
|| status == Status.STOPPED
|| status == Status.READY) {
mediaPlayer.play();
}
}
@Override
public void stop() {
mediaPlayer.stop();
}
public class MediaControl extends BorderPane {
private MediaPlayer mp;
private MediaView mediaView;
private final boolean repeat = false;
private boolean stopRequested = false;
private boolean atEndOfMedia = false;
private Duration duration;
private Slider timeSlider;
private Label playTime;
private Slider volumeSlider;
private HBox mediaBar;
private final Image PlayButtonImage = new Image(AdvancedMedia.class.getResourceAsStream("playbutton.png"));
private final Image PauseButtonImage = new Image(AdvancedMedia.class.getResourceAsStream("pausebutton.png"));
ImageView imageViewPlay = new ImageView(PlayButtonImage);
ImageView imageViewPause = new ImageView(PauseButtonImage);
private Pane mvPane;
private Stage newStage;
private boolean fullScreen = false;
@Override
protected void layoutChildren() {
if (mediaView != null && getBottom() != null) {
mediaView.setFitWidth(getWidth());
mediaView.setFitHeight(getHeight() - getBottom().prefHeight(-1));
}
super.layoutChildren();
if (mediaView != null && getCenter() != null) {
mediaView.setTranslateX((((Pane) getCenter()).getWidth() - mediaView.prefWidth(-1)) / 2);
mediaView.setTranslateY((((Pane) getCenter()).getHeight() - mediaView.prefHeight(-1)) / 2);
}
}
@Override
protected double computeMinWidth(double height) {
return mediaBar.prefWidth(-1);
}
@Override
protected double computeMinHeight(double width) {
return 200;
}
@Override
protected double computePrefWidth(double height) {
return Math.max(mp.getMedia().getWidth(), mediaBar.prefWidth(height));
}
@Override
protected double computePrefHeight(double width) {
return mp.getMedia().getHeight() + mediaBar.prefHeight(width);
}
@Override
protected double computeMaxWidth(double height) {
return Double.MAX_VALUE;
}
@Override
protected double computeMaxHeight(double width) {
return Double.MAX_VALUE;
}
public MediaControl(final MediaPlayer mp) {
this.mp = mp;
setStyle("-fx-background-color: #bfc2c7;"); // TODO: Use css file
mediaView = new MediaView(mp);
mvPane = new Pane();
mvPane.getChildren().add(mediaView);
mvPane.setStyle("-fx-background-color: black;"); // TODO: Use css file
setCenter(mvPane);
mediaBar = new HBox(5.0);
mediaBar.setPadding(new Insets(5, 10, 5, 10));
mediaBar.setAlignment(Pos.CENTER_LEFT);
BorderPane.setAlignment(mediaBar, Pos.CENTER);
final Button playButton = ButtonBuilder.create()
.minWidth(Control.USE_PREF_SIZE)
.build();
playButton.setGraphic(imageViewPlay);
playButton.setOnAction(new EventHandler<ActionEvent>() {
public void handle(ActionEvent e) {
updateValues();
Status status = mp.getStatus();
if (status == Status.UNKNOWN
|| status == Status.HALTED) {
// don't do anything in these states
return;
}
if (status == Status.PAUSED
|| status == Status.READY
|| status == Status.STOPPED) {
// rewind the movie if we're sitting at the end
if (atEndOfMedia) {
mp.seek(mp.getStartTime());
atEndOfMedia = false;
playButton.setGraphic(imageViewPlay);
//playButton.setText(">");
updateValues();
}
mp.play();
playButton.setGraphic(imageViewPause);
//playButton.setText("||");
} else {
mp.pause();
}
}
});
mp.currentTimeProperty().addListener(new ChangeListener<Duration>() {
@Override
public void changed(ObservableValue<? extends Duration> observable, Duration oldValue, Duration newValue) {
updateValues();
}
});
mp.setOnPlaying(new Runnable() {
public void run() {
if (stopRequested) {
mp.pause();
stopRequested = false;
} else {
playButton.setGraphic(imageViewPause);
//playButton.setText("||");
}
}
});
mp.setOnPaused(new Runnable() {
public void run() {
playButton.setGraphic(imageViewPlay);
//playButton.setText("||");
}
});
mp.setOnReady(new Runnable() {
public void run() {
duration = mp.getMedia().getDuration();
updateValues();
}
});
mp.setCycleCount(repeat ? MediaPlayer.INDEFINITE : 1);
mp.setOnEndOfMedia(new Runnable() {
public void run() {
if (!repeat) {
playButton.setGraphic(imageViewPlay);
//playButton.setText(">");
stopRequested = true;
atEndOfMedia = true;
}
}
});
mediaBar.getChildren().add(playButton);
// Time label
Label timeLabel = new Label("Time");
timeLabel.setMinWidth(Control.USE_PREF_SIZE);
mediaBar.getChildren().add(timeLabel);
// Time slider
timeSlider = SliderBuilder.create()
.minWidth(30)
.maxWidth(Double.MAX_VALUE)
.build();
HBox.setHgrow(timeSlider, Priority.ALWAYS);
timeSlider.valueProperty().addListener(new InvalidationListener() {
public void invalidated(Observable ov) {
if (timeSlider.isValueChanging()) {
// multiply duration by percentage calculated by slider position
if (duration != null) {
mp.seek(duration.multiply(timeSlider.getValue() / 100.0));
}
updateValues();
}
}
});
mediaBar.getChildren().add(timeSlider);
// Play label
playTime = LabelBuilder.create()
//.prefWidth(130)
.minWidth(Control.USE_PREF_SIZE)
.build();
mediaBar.getChildren().add(playTime);
//Fullscreen button
Button buttonFullScreen = ButtonBuilder.create()
.text("Full Screen")
.minWidth(Control.USE_PREF_SIZE)
.build();
buttonFullScreen.setOnAction(new EventHandler<ActionEvent>() {
@Override
public void handle(ActionEvent event) {
if (!fullScreen) {
newStage = new Stage();
newStage.fullScreenProperty().addListener(new ChangeListener<Boolean>() {
@Override
public void changed(ObservableValue<? extends Boolean> ov, Boolean t, Boolean t1) {
onFullScreen();
}
});
final BorderPane borderPane = new BorderPane() {
@Override
protected void layoutChildren() {
if (mediaView != null && getBottom() != null) {
mediaView.setFitWidth(getWidth());
mediaView.setFitHeight(getHeight() - getBottom().prefHeight(-1));
}
super.layoutChildren();
if (mediaView != null) {
mediaView.setTranslateX((((Pane) getCenter()).getWidth() - mediaView.prefWidth(-1)) / 2);
mediaView.setTranslateY((((Pane) getCenter()).getHeight() - mediaView.prefHeight(-1)) / 2);
}
}
;
};
setCenter(null);
setBottom(null);
borderPane.setCenter(mvPane);
borderPane.setBottom(mediaBar);
Scene newScene = new Scene(borderPane);
newStage.setScene(newScene);
//Workaround for disposing stage when exit fullscreen
newStage.setX(-100000);
newStage.setY(-100000);
newStage.setFullScreen(true);
fullScreen = true;
newStage.show();
} else {
//toggle FullScreen
fullScreen = false;
newStage.setFullScreen(false);
}
}
});
mediaBar.getChildren().add(buttonFullScreen);
// Volume label
Label volumeLabel = new Label("Vol");
volumeLabel.setMinWidth(Control.USE_PREF_SIZE);
mediaBar.getChildren().add(volumeLabel);
// Volume slider
volumeSlider = SliderBuilder.create()
.prefWidth(70)
.minWidth(30)
.maxWidth(Region.USE_PREF_SIZE)
.build();
volumeSlider.valueProperty().addListener(new InvalidationListener() {
public void invalidated(Observable ov) {
}
});
volumeSlider.valueProperty().addListener(new ChangeListener<Number>() {
@Override
public void changed(ObservableValue<? extends Number> observable, Number oldValue, Number newValue) {
if (volumeSlider.isValueChanging()) {
mp.setVolume(volumeSlider.getValue() / 100.0);
}
}
});
mediaBar.getChildren().add(volumeSlider);
setBottom(mediaBar);
}
protected void onFullScreen() {
if (!newStage.isFullScreen()) {
fullScreen = false;
setCenter(mvPane);
setBottom(mediaBar);
Platform.runLater(new Runnable() {
@Override
public void run() {
newStage.close();
}
});
}
}
protected void updateValues() {
if (playTime != null && timeSlider != null && volumeSlider != null && duration != null) {
Platform.runLater(new Runnable() {
public void run() {
Duration currentTime = mp.getCurrentTime();
playTime.setText(formatTime(currentTime, duration));
timeSlider.setDisable(duration.isUnknown());
if (!timeSlider.isDisabled() && duration.greaterThan(Duration.ZERO) && !timeSlider.isValueChanging()) {
timeSlider.setValue(currentTime.divide(duration).toMillis() * 100.0);
}
if (!volumeSlider.isValueChanging()) {
volumeSlider.setValue((int) Math.round(mp.getVolume() * 100));
}
}
});
}
}
private String formatTime(Duration elapsed, Duration duration) {
int intElapsed = (int) Math.floor(elapsed.toSeconds());
int elapsedHours = intElapsed / (60 * 60);
if (elapsedHours > 0) {
intElapsed -= elapsedHours * 60 * 60;
}
int elapsedMinutes = intElapsed / 60;
int elapsedSeconds = intElapsed - elapsedHours * 60 * 60 - elapsedMinutes * 60;
if (duration.greaterThan(Duration.ZERO)) {
int intDuration = (int) Math.floor(duration.toSeconds());
int durationHours = intDuration / (60 * 60);
if (durationHours > 0) {
intDuration -= durationHours * 60 * 60;
}
int durationMinutes = intDuration / 60;
int durationSeconds = intDuration - durationHours * 60 * 60 - durationMinutes * 60;
if (durationHours > 0) {
return String.format("%d:%02d:%02d/%d:%02d:%02d",
elapsedHours, elapsedMinutes, elapsedSeconds,
durationHours, durationMinutes, durationSeconds);
} else {
return String.format("%02d:%02d/%02d:%02d",
elapsedMinutes, elapsedSeconds,
durationMinutes, durationSeconds);
}
} else {
if (elapsedHours > 0) {
return String.format("%d:%02d:%02d",
elapsedHours, elapsedMinutes, elapsedSeconds);
} else {
return String.format("%02d:%02d",
elapsedMinutes, elapsedSeconds);
}
}
}
}
@Override
public void start(Stage primaryStage) throws Exception {
init(primaryStage);
primaryStage.show();
play();
}
/**
* The main() method is ignored in correctly deployed JavaFX application.
* main() serves only as fallback in case the application can not be
* launched through deployment artifacts, e.g., in IDEs with limited FX
* support. NetBeans ignores main().
*
* @param args the command line arguments
*/
public static void main(String[] args) {
launch(args);
}
}