Java read and wait file, BufferedReader, also ffmpeg progress calculation, try catch, finally, FileReader

readFileNWait.java

BufferedReader br = null;
try {
 br = new BufferedReader(
  new FileReader(output.getAbsolutePath() + ".log"));
 String line;
 double totalSecs = 0;
 double totalFps = 0;
 while (keepReading) {
  line = br.readLine();
  if (line == null) {
   //wait until there is more of the file for us to read
   Thread.sleep(1);
  } else {
   Pattern durPattern = Pattern.compile("(?<=Duration: )[^,]*");
   Scanner sc = new Scanner(line);
   String dur = sc.findWithinHorizon(durPattern, 0);
   if (totalSecs <= 0 && TextUtils.isEmpty(dur)) {
    continue;
   }
   if (totalSecs <= 0 && !TextUtils.isEmpty(dur)) {
    String[] hms = dur.split(":");
    totalSecs = Integer.parseInt(hms[0]) * 3600 + Integer.parseInt(hms[1]) * 60 + Double.parseDouble(hms[2]);
    System.out.println("Total duration: " + totalSecs + " seconds.");
    continue;
   }
   Pattern fpsPattern = Pattern.compile("[0-9.]* (?=fps)");
   String fps = sc.findWithinHorizon(fpsPattern, 0);
   if (totalFps <= 0 && TextUtils.isEmpty(fps)) {
    continue;
   }
   if (totalFps <= 0 && !TextUtils.isEmpty(fps)) {
    totalFps = Double.valueOf(fps) * totalSecs;
    System.out.println("Total fps: " + totalFps + " fps.");
    continue;
   }

   Pattern framePatter = Pattern.compile("(?<=frame=)[0-9 ]*");
   String frame = sc.findWithinHorizon(framePatter, 0);
   if (!TextUtils.isEmpty(frame)) {
    double progress = Double.valueOf(frame) / totalFps;
    System.out.printf("Progress: %.2f%%%n", progress * 100);
    continue;
   }

   Pattern finishPattern = Pattern.compile("successfully");
   String finish = sc.findWithinHorizon(finishPattern, 0);
   if (!TextUtils.isEmpty(finish)) {
    System.out.printf("Progress: 100%%");
    br.close();
    break;
   }
  }
 }
} catch (FileNotFoundException e) {
 e.printStackTrace();
} catch (InterruptedException e) {
 e.printStackTrace();
} catch (IOException e) {
 e.printStackTrace();
} finally {
 try {
  if (br != null) {
   br.close();
  }
 } catch (IOException io) {
  //log exception here
 }

 try {
  File file = new File(output.getAbsolutePath() + ".log");
  file.delete();
 } catch (Exception e) {
  e.printStackTrace();
 }
}