modify: add subtitle into video

app/src/main/java/com/frank/ffmpeg/activity/VideoHandleActivity.kt

@@ -339,7 +339,7 @@ class VideoHandleActivity : BaseActivity() {
             R.id.btn_add_subtitle//add subtitle into video
             -> {
                 val subtitlePath = PATH + File.separator + "test.ass"
-                val addSubtitlePath = PATH + File.separator + "subtitle" + suffix
+                val addSubtitlePath = PATH + File.separator + "subtitle.mkv"
                 commandLine = FFmpegUtil.addSubtitleIntoVideo(srcFile, subtitlePath, addSubtitlePath)
             }
             R.id.btn_rotate// set the rotate degree of video

app/src/main/java/com/frank/ffmpeg/util/FFmpegUtil.java

@@ -702,7 +702,7 @@ public class FFmpegUtil {
     }
 
     public static String[] addSubtitleIntoVideo(String inputPath, String subtitlePath, String outputPath) {
-        String subtitleCmd = "ffmpeg -i %s -vf subtitles=%s %s";
+        String subtitleCmd = "ffmpeg -i %s -i %s -map 0:v -map 0:a -map 1:s -c copy %s";
         subtitleCmd = String.format(subtitleCmd, inputPath, subtitlePath, outputPath);
         return subtitleCmd.split(" ");
     }