我想实现诸如“跳过简介”之类的功能，并在我的视频播放器中跳过功劳。我正在使用Exoplayer，假设我有一个长度为00:15:21（hh：mm：ss）的视频，我知道该视频的实际内容始于00:00:18且内容始于00:14 ：12。我想像在NetFlix中一样显示“跳过简介”和“下一集”按钮。我该如何实现？
Exoplayer页面Github上的问题： https://github.com/google/ExoPlayer/issues/5515
答案 0 :(得分：1)
在Developer Guide中，您可以使用ClippingMediaSource API来完成任务。
ClippingMediaSource可用于剪辑MediaSource，以便仅播放其中的一部分
要从00:00:18开始播放视频，直到结束（跳过简介）。
MediaSource videoSource =
new ExtractorMediaSource.Factory(...).createMediaSource(videoUri);
// Clip to start at from 00:00:18 to the end.
ClippingMediaSource clippingSource =
new ClippingMediaSource(
videoSource,
/* startPositionUs= */ 18_000_000,
/* endPositionUs= */ C.TIME_END_OF_SOURCE);
要从00:14:12到结尾播放视频（下一集）
MediaSource videoSource =
new ExtractorMediaSource.Factory(...).createMediaSource(videoUri);
// Clip to start at from 00:14:12 to the end.
ClippingMediaSource clippingSource =
new ClippingMediaSource(
videoSource,
/* startPositionUs= */ 852_000_000,
/* endPositionUs= */ C.TIME_END_OF_SOURCE);
或者从00:00:18到00:14:12播放视频
MediaSource videoSource =
new ExtractorMediaSource.Factory(...).createMediaSource(videoUri);
// Clip to start at from 00:00:18 to 00:14:12.
ClippingMediaSource clippingSource =
new ClippingMediaSource(
videoSource,
/* startPositionUs= */ 18_000_000,
/* endPositionUs= */ 852_000_000);
您可以找到有关API here的更多信息。
答案 1 :(得分：0)
好的，在ExoPlayer开发人员自己的帮助下，我找到了解决方案。详细信息在我在问题中添加的参考链接中。这是摘要：
只要我们知道跳过的持续时间，我们就可以创建消息并将其发送到Exoplayer，并在回调中，我们可以实现我们的业务逻辑，例如使按钮可见，按钮的onClickListners等。
private class PlayerEventListener extends Player.DefaultEventListener {
@Override
public void onPositionDiscontinuity(@Player.DiscontinuityReason int reason) {
prepareSkipToNextEpisode();
if(reason == DISCONTINUITY_REASON_PERIOD_TRANSITION){ //when a video naturally ends it course and starts playing next video.
prepareSkipIntro();
}
}
}
@Override
public void onTracksChanged(TrackGroupArray trackGroups, TrackSelectionArray trackSelections) {
super.onTracksChanged(trackGroups, trackSelections);
}
@Override
public void onPlayerStateChanged(boolean playWhenReady, int playbackState) {
String stateString;
switch (playbackState) {
case Player.STATE_IDLE: // The player does not have any media to play.
stateString = "Player.STATE_IDLE";
mProgressBar.setVisibility(View.VISIBLE);
playerView.setKeepScreenOn(false);
//mPlayerView.hideController();
mediaControlsLayout.setVisibility(View.GONE);
break;
case Player.STATE_BUFFERING: // The player needs to load media before playing.
stateString = "Player.STATE_BUFFERING";
mProgressBar.setVisibility(View.VISIBLE);
mediaControlsLayout.setVisibility(View.GONE);
playerView.setKeepScreenOn(true);
break;
case Player.STATE_READY: // The player is able to immediately play from its current position.
stateString = "Player.STATE_READY";
mProgressBar.setVisibility(View.GONE);
mediaControlsLayout.setVisibility(View.VISIBLE);
playerView.setKeepScreenOn(true);
prepareSkipToNextEpisode();
if((player.getContentPosition() < 5000)) {
prepareSkipIntro();
}
//prepareSkipToNextEpisode();
break;
case Player.STATE_ENDED: // The player has finished playing the media.
stateString = "Player.STATE_ENDED";
playerView.setKeepScreenOn(false);
break;
default:
stateString = "UNKNOWN_STATE";
break;
}
}
}
private void prepareSkipIntro(){
if(episodeStartTimes[player.getCurrentWindowIndex()] > 0) {
inttoBeginsHandler = new Handler();
long introDurationMs = 3 * 1000;
player.createMessage((messageType, payload) -> hideSkipIntro())
.setPosition(introDurationMs).setHandler(inttoBeginsHandler).send();
}
}
private void hideSkipIntro(){
if(player.getCurrentPosition()>2500) {
skipIntroBtn.setVisibility(View.VISIBLE);
skipIntroBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (player != null) {
player.seekTo(episodeStartTimes[player.getCurrentWindowIndex()]);
prepareSkipToNextEpisode();
skipIntroBtn.setVisibility(View.GONE);
}
}
});
final Handler handler = new Handler();
handler.postDelayed(new Runnable() {
@Override
public void run() {
skipIntroBtn.setVisibility(View.GONE);
}
}, 5000);
}
}
private void prepareSkipToNextEpisode(){
if(episodeEndTimes[player.getCurrentWindowIndex()] > 0) {
if (player.getCurrentPosition() < 1000) {
remainingTime = episodeDummyEndtimes[player.getCurrentWindowIndex()];
} else {
remainingTime = episodeDummyEndtimes[player.getCurrentWindowIndex()] - player.getCurrentPosition();
}
creditsBeginssHandler = null;
creditsBeginssHandler = new Handler();
player.createMessage((messageType, payload) -> endEpisode())
.setPosition(remainingTime).setHandler(creditsBeginssHandler).send();
}
}
private void endEpisode(){
if(player.getCurrentPosition()>= episodeDummyEndtimes[player.getCurrentWindowIndex()]) {
if (player.getCurrentWindowIndex() < (episodeEndTimes.length-1)) { // no need of skip credits for the final episode
skipCreditsBtn.setVisibility(View.VISIBLE);
skipCreditsBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
player.seekTo(player.getNextWindowIndex(), 0);
skipCreditsBtn.setVisibility(View.GONE);
}
});
final Handler handler = new Handler();
handler.postDelayed(new Runnable() {
@Override
public void run() {
skipCreditsBtn.setVisibility(View.GONE);
}
}, 5000);
}else{
skipCreditsBtn.setVisibility(View.GONE);
}
}
}
在这里，我通常以00:15:00作为视频内容的结尾，请注意，如果用户使用搜索栏手动移动了该持续时间，则不会触发该消息。
答案 2 :(得分：0)
这里简短而甜美的方法就在这里。
下面的代码会在最多13秒的开始时间剪辑视频，以跳过介绍。
视频源为HlsMediaSource，但您可以对VideoSource进行类似的操作。
DefaultHttpDataSourceFactory dataSourceFactory = getSettedHeadersDataFactory();
HlsMediaSource hlsMediaSource =
new HlsMediaSource.Factory(dataSourceFactory).createMediaSource(Uri.parse(qualities.get(currentQuality).getQualityUrl()));
ClippingMediaSource clippingSource =
new ClippingMediaSource(
hlsMediaSource,
/* startPositionUs= */ 13_000_000,
/* endPositionUs= */ C.TIME_END_OF_SOURCE);
player.prepare(clippingSource);