很多朋友都想知道java怎么獲取視頻時長？下面就一起來了解一下吧~

可以通過視頻的url地址或者是上傳視頻 文件有類型為（MultipartFile）的來獲取視頻的時長。

通過MultipartFile?的文件類型獲取視頻時長：

這個方式的獲取比較好辦；直接上碼：類名=》VideoUtil.java

/**
?????*?通過MultipartFile?的文件類型獲取視頻時長
?????*?@param?file
?????*?@return
?????*/
????public?Integer?ReadVideoTimeMs(MultipartFile?file)?{
????????Encoder?encoder?=?new?Encoder();
????????long?ms?=?0;
????????try?{
????????????//?獲取文件類型
????????????String?fileName?=?file.getContentType();
????????????//?獲取文件后綴
????????????String?pref?=?fileName.indexOf("/")?!=?-1???fileName.substring(fileName.lastIndexOf("/")?+?1,?fileName.length())?:?null;
????????????String?prefix?=?"."?+?pref;
????????????//?用uuid作為文件名，防止生成的臨時文件重復
????????????final?File?excelFile?=?File.createTempFile(UUID.randomUUID().toString().replace("-",?""),?prefix);
????????????//?MultipartFile?to?File
????????????file.transferTo(excelFile);
????????????MultimediaInfo?m?=?encoder.getInfo(excelFile);
????????????ms?=?m.getDuration();
????????????//程序結束時，刪除臨時文件
????????????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;
????}
????/**
?????*?通過url地址獲取視頻時長
?????*?@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;
????}

通過url地址獲取視頻時長

url地址來獲取的時長需要做一定的轉換，要先獲取文件

主要的方法代碼：類名 =》VideoUtil.java

/**
?????*?通過url地址獲取視頻時長
?????*?@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 ：類名 =》VideoUtil.java

public?static?File?getFileByUrl(String?url)?throws??IOException?{
????????File?tmpFile?=?File.createTempFile("temp",?".tmp");//創建臨時文件
????????VideoUrl.toBDFile(url,?tmpFile.getCanonicalPath());
????????return?tmpFile;
????}

toBDFile() 方法：類名 =》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：類名?=》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();
????}

不要忘記刪除自己生成的臨時文件：類名 =》VideoUtil.java

/**
?????*?刪除臨時文件
?????*?@param?files
?????*/
????private?static?void?deleteFile(File...?files)?{
????????for?(File?file?:?files)?{
????????????if?(file.exists())?{
????????????????file.delete();
????????????}
????????}
????}

總結

兩個方法的獲取視頻的時長，最后讀取的數據單位都是s(秒)。

以上就是小編今天的分享，希望能夠幫到大家。