很多朋友都想知道java怎么获取视频时长？下面就一起来了解一下吧~
可以通过视频的url地址或者是上传视频 文件有类型为（MultipartFile）的来获取视频的时长。
通过MultipartFile 的文件类型获取视频时长：
这个方式的获取比较好办；直接上码：类名=》VideoUtil.java
/**
* 通过MultipartFile 的文件类型获取视频时长
* @param file
* @return
*/
public Integer ReadVideoTimeMs(MultipartFile file) {
Encoder encoder = new Encoder();
long ms = 0;
try {
// 获取文件类型
String fileName = file.getContentType();
// 获取文件后缀
String pref = fileName.indexOf("/") != -1 ? fileName.substring(fileName.lastIndexOf("/") + 1, fileName.length()) : null;
String prefix = "." + pref;
// 用uuid作为文件名，防止生成的临时文件重复
final File excelFile = File.createTempFile(UUID.randomUUID().toString().replace("-", ""), prefix);
// MultipartFile to File
file.transferTo(excelFile);
MultimediaInfo m = encoder.getInfo(excelFile);
ms = m.getDuration();
//程序结束时，删除临时文件
VideoUtil.deleteFile(excelFile);
} catch (Exception e) {
e.printStackTrace();
}
int ss = 1000;
int mi = ss * 60;
int hh = mi * 60;
int dd = hh * 24;
long day = ms / dd;
long hour = (ms - day * dd) / hh;
long minute = (ms - day * dd - hour * hh) / mi;
long second = (ms - day * dd - hour * hh - minute * mi) / ss;
Integer timeMS = Math.toIntExact(hour * 3600 + minute * 60 + second);
return timeMS;
}
/**
* 通过url地址获取视频时长
* @param fileName
* @return
*/
public Integer FileVideoTimeMs(String fileName){
Encoder encoder = new Encoder();
long ms = 0;
try {
File file = getFileByUrl(fileName);
MultimediaInfo m = encoder.getInfo(file);
ms = m.getDuration();
VideoUtil.deleteFile(file);
}catch (Exception e){
e.printStackTrace();
}
int ss = 1000;
int mi = ss * 60;
int hh = mi * 60;
int dd = hh * 24;
long day = ms / dd;
long hour = (ms - day * dd) / hh;
long minute = (ms - day * dd - hour * hh) / mi;
long second = (ms - day * dd - hour * hh - minute * mi) / ss;
Integer timeMS = Math.toIntExact(hour * 3600 + minute * 60 + second);
return timeMS;
}通过url地址获取视频时长
url地址来获取的时长需要做一定的转换，要先获取文件
主要的方法代码：类名 =》VideoUtil.java
/**
* 通过url地址获取视频时长
* @param fileName
* @return
*/
public Integer FileVideoTimeMs(String fileName){
Encoder encoder = new Encoder();
long ms = 0;
try {
File file = getFileByUrl(fileName);
MultimediaInfo m = encoder.getInfo(file);
ms = m.getDuration();
VideoUtil.deleteFile(file);
}catch (Exception e){
e.printStackTrace();
}
int ss = 1000;
int mi = ss * 60;
int hh = mi * 60;
int dd = hh * 24;
long day = ms / dd;
long hour = (ms - day * dd) / hh;
long minute = (ms - day * dd - hour * hh) / mi;
long second = (ms - day * dd - hour * hh - minute * mi) / ss;
Integer timeMS = Math.toIntExact(hour * 3600 + minute * 60 + second);
return timeMS;
}getFileByUrl()方法 ：类名 =》VideoUtil.java
public static File getFileByUrl(String url) throws IOException {
File tmpFile = File.createTempFile("temp", ".tmp");//创建临时文件
VideoUrl.toBDFile(url, tmpFile.getCanonicalPath());
return tmpFile;
}toBDFile() 方法：类名 =》VideoUrl.java
public static void toBDFile(String urlStr, String bdUrl) throws IOException, UnknownHostException {
URL url = new URL(urlStr);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
DataInputStream in = new DataInputStream(conn.getInputStream());
byte[] data = toByteArray(in);
in.close();
FileOutputStream out = new FileOutputStream(bdUrl);
out.write(data);
out.close();
}
toByteArray()方法：类名 =》VideoUrl.java
public static byte[] toByteArray(InputStream in) throws IOException {
ByteArrayOutputStream out = new ByteArrayOutputStream();
byte[] buffer = new byte[1024 * 4];
int n = 0;
while ((n = in.read(buffer)) != -1) {
out.write(buffer, 0, n);
}
return out.toByteArray();
}不要忘记删除自己生成的临时文件：类名 =》VideoUtil.java
/**
* 删除临时文件
* @param files
*/
private static void deleteFile(File... files) {
for (File file : files) {
if (file.exists()) {
file.delete();
}
}
}总结
两个方法的获取视频的时长，最后读取的数据单位都是s(秒)。
以上就是小编今天的分享，希望能够帮到大家。