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2018年8月31日 更新,经过了一段时间的使用,我决定把这个下载类再升级一下。升级为一个工具类。我贴在了另一篇帖子中。
M3U8下载,直播源下载,FLASH下载(四)-直播源下载-工具类
在工作或者生活中,我们往往会在网页中碰见一些不错的视频,想下载下来存到本地,但是无奈视频是flash播放的,不能在开发者工具中找到视频的绝对地址进行下载,反而是找到了个直播源,譬如:http://video.newsapp.cnr.cn/data/video/2018/7358/index.m3u8
这样的链接是直播源地址,很多电视台的流媒体或者网络直播就是采用这样的方式,优点我就不说了,请自己baidu。
JDK安装
ffmpeg安装:https://blog.csdn.net/u_ascend/article/details/80418402
package cn.edu.zua.common.util.audio;
import cn.edu.zua.common.util.UtilTools;
import org.apache.commons.io.FileUtils;
import org.apache.commons.io.IOUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.*;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;
/**
* AudioM3U8Downloader
*
* @author ascend
* @date 2018/06/08 11:07.
*/
public class AudioM3U8Downloader {
private static final Logger LOG = LoggerFactory.getLogger(AudioM3U8Downloader.class);
private static final String basePath = "/tmp/";
private static final int downloaderMaxSecond = 120;
private AudioM3U8Downloader() {
}
/**
* 测试方法
*/
public static void main(String[] args) throws Exception {
byte[] bytes = downloadBytes("http://recordcdn.quklive.com/upload/vod/user1462960877450854/1527512379701708/3/video.m3u8");
System.out.println(bytes.length);
LOG.debug("等待2s");
TimeUnit.SECONDS.sleep(2);
// File file = downloadFile("http://recordcdn.quklive.com/upload/vod/user1462960877450854/1524531065801767/3/video.m3u8");
// System.out.println("file.getAbsolutePath() = " + file.getAbsolutePath());
}
/**
* 把m3u8短视频下载后提取File
* @param m3u8Url 直播源地址
* @return 直播源文件,File
* @throws InterruptedException 中断异常
* @throws IOException IO异常
*/
public static File downloadFile(String m3u8Url) throws InterruptedException, IOException {
String fileName = UtilTools.getUUIDyyyyMMddHHmmss();
File f = new File("/tmp/");
if (!f.exists()) {
f.mkdirs();
}
String fullFileName = "/tmp/" + fileName + ".mp4";
String command = "ffmpeg -i " + m3u8Url + " -vcodec copy " + fullFileName + " -y";
LOG.debug("执行命令:{}", command);
Process process = Runtime.getRuntime().exec(command);
ExecutorService executorService = Executors.newFixedThreadPool(3);
getStream(executorService, process.getErrorStream(), true);
getStream(executorService, process.getInputStream(), false);
TimeUnit.SECONDS.sleep(10);
File file = new File(fullFileName);
// 最长再等待24秒
for (int i = 0; i < 8; i++) {
if (!file.exists()) {
LOG.debug("文件不存在,重新创建...");
TimeUnit.SECONDS.sleep(3);
file = new File(fullFileName);
}
}
long size = 0;
final boolean[] checkFlag = {true};
executorService.execute(() -> {
try {
TimeUnit.SECONDS.sleep(150);
checkFlag[0] = false;
} catch (InterruptedException e) {
LOG.error("最长等待线程被中断,正常错误", e);
}
});
int maxCount = 10;
while (checkFlag[0]) {
TimeUnit.SECONDS.sleep(5);
long fileLength = file.length();
LOG.debug("上一次监测的大小:{}, 本次监测的大小:{}", size, fileLength);
if (file.length() != size) {
size = file.length();
TimeUnit.SECONDS.sleep(5);
} else {
if (fileLength == 0 && maxCount-- > 0) {
continue;
} else {
LOG.debug("退出循环...");
checkFlag[0] = false;
}
}
}
process.destroy();
executorService.shutdownNow();
LOG.info("文件下载成功:{}", file.getAbsolutePath());
return file;
}
/**
* 把m3u8短视频下载后提取byte数组,并且删除临时文件
* @param m3u8Url 直播源地址
* @return byte[],从文件中提取的字节数组
* @throws InterruptedException 中断异常
* @throws IOException IO异常
*/
public static byte[] downloadBytes(String m3u8Url) throws InterruptedException, IOException {
File file = downloadFile(m3u8Url);
LOG.debug("字节数组方法下载调用成功:{}, 文件大小:{}", file.getAbsolutePath(), file.length());
LOG.debug("睡眠2秒钟,把文件转换为字节数组");
TimeUnit.SECONDS.sleep(2);
FileInputStream input = FileUtils.openInputStream(file);
byte[] bytes = IOUtils.toByteArray(input);
input.close();
LOG.info("返回文件数组!!文件长度:{}", bytes.length);
// 删除下载后的文件
if (file.exists()) {
LOG.debug("文件存在,删除文件!");
if (Files.deleteIfExists(Paths.get(file.toURI()))) {
LOG.debug("删除成功");
}else {
LOG.debug("删除失败");
}
}
return bytes;
}
private static void getStream(ExecutorService executorService, final InputStream inputStream, final boolean printFlag) {
executorService.execute(() -> {
BufferedInputStream in = new BufferedInputStream(inputStream);
byte[] bytes = new byte[1024];
try {
while (in.read(bytes) != -1) {
String s = new String(bytes, 0, bytes.length);
if (printFlag) {
// LOG.error("ffmpeg:error when downloading!\ninfo:"+s);
}
// LOG.debug("read from inputstream:{}", s);
}
} catch (IOException e) {
LOG.error("读取下载流失败", e);
} finally {
try {
in.close();
} catch (IOException e) {
LOG.error("关闭读取流失败:", e);
}
}
});
}
}
看这里,看这里
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