import org.schabi.newpipe.extractor.stream.StreamExtractor; //导入依赖的package包/类
public static void main(String argv[]) {
    if(argv.length == 0) {
        System.err.println("please provide a youtube url as first parameter.");
        return;
    }

    String url = argv[0];

    //first we need to set the Downloader, so NewPipe knows how to get the files
    NewPipe.init(initDownloader());
    try {
        StreamingService youtube = NewPipe.getService("Youtube");
        StreamExtractor extractor = youtube.getStreamExtractorInstance(url);

        // actual extraction
        StreamInfo streamInfo = StreamInfo.getVideoInfo(extractor);

        // if non critical exceptions happened during extraction they will be printed now
        for(Throwable error : streamInfo.errors) {
            System.err.println("----------------");
            error.printStackTrace();
        }

        // now print the stream url and we are done
        for(VideoStream stream : streamInfo.video_streams) {
            if(stream.resolution.contains("320p") ||
                    stream.resolution.contains("720p") ||
                    stream.resolution.contains("360p")) {
                System.out.print(stream.url);
                return;
            }
        }

    } catch (Exception e) {
        e.printStackTrace();
    }
}
 

import org.schabi.newpipe.extractor.stream.StreamExtractor; //导入依赖的package包/类
public static List<InfoItem> getRelatedVideosOrLogError(StreamInfo info, StreamExtractor extractor) {
    StreamInfoItemCollector collector;
    try {
        collector = extractor.getRelatedVideos();
    } catch (Exception e) {
        info.addError(e);
        return Collections.emptyList();
    }
    // Get from collector
    return getInfoItems(info, collector);
}
 

import org.schabi.newpipe.extractor.stream.StreamExtractor; //导入依赖的package包/类
@Override
public StreamExtractor getStreamExtractor(String url) throws IOException, ExtractionException {
    return new SoundcloudStreamExtractor(this, url);
}
 

import org.schabi.newpipe.extractor.stream.StreamExtractor; //导入依赖的package包/类
@Override
public StreamExtractor getStreamExtractor(String url) throws IOException, ExtractionException {
    return new YoutubeStreamExtractor(this, url);
}
 

import org.schabi.newpipe.extractor.stream.StreamExtractor; //导入依赖的package包/类
@Test
public void testGetValidTimeStamp() throws IOException, ExtractionException {
    StreamExtractor extractor = SoundCloud.getService().getStreamExtractor("https://soundcloud.com/liluzivert/do-what-i-want-produced-by-maaly-raw-don-cannon#t=69");
    assertEquals(extractor.getTimeStamp() + "", "69");
}
 

import org.schabi.newpipe.extractor.stream.StreamExtractor; //导入依赖的package包/类
@Test
public void testGetValidTimeStamp() throws IOException, ExtractionException {
    StreamExtractor extractor = YouTube.getService().getStreamExtractor("https://youtu.be/FmG385_uUys?t=174");
    assertEquals(extractor.getTimeStamp() + "", "174");
}
 

import org.schabi.newpipe.extractor.stream.StreamExtractor; //导入依赖的package包/类
public abstract StreamExtractor getStreamExtractor(String url) throws IOException, ExtractionException;