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• JAVA Spring : Grabbing Image from a multipartFile video via FFMPEG JavaCV

  29 août 2023, par Thanh Hiếu Nguyễn

  I'm trying to achieve Grabbing a frame from a MultipartFile or URL and here's my attempt.

  


  URL :

  


  InputStream inputStream = new java.net.URL(video.getUrl()).openStream();

FFmpegFrameGrabber grabber = new FFmpegFrameGrabber(inputStream);
grabber.start();

int frameRate = (int) grabber.getFrameRate();
int targetFrameNumber = (int) (frameRate * timeLengthSeconds);

grabber.setFrameNumber(targetFrameNumber);
Frame frame = grabber.grab();

grabber.stop();

if (frame != null) {
    Java2DFrameConverter converter = new Java2DFrameConverter();
    BufferedImage bufferedImage = converter.getBufferedImage(frame);
    ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
    ImageIO.write(bufferedImage, "jpeg", byteArrayOutputStream);
    byte[] bytes = byteArrayOutputStream.toByteArray();


  


  MultipartFile :

  


  byte[] videoBytes = video.getBytes();

FFmpegFrameGrabber grabber = new FFmpegFrameGrabber(new ByteArrayInputStream(videoBytes));
int frameRate = (int) 30;
int targetFrameNumber = (int) (frameRate * timeLengthSeconds);

grabber.setFrameNumber(targetFrameNumber);
grabber.setVideoStream(10);
grabber.start();


Frame frame = grabber.grab();

grabber.stop();

if (frame != null) {
    Java2DFrameConverter converter = new Java2DFrameConverter();
    BufferedImage bufferedImage = converter.getBufferedImage(frame);
    ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
    ImageIO.write(bufferedImage, "jpeg", byteArrayOutputStream);
    byte[] bytes = byteArrayOutputStream.toByteArray();


  


  Both of them generates an AUDIO type of Frame, so later I can't buffer an image out of it, tried different videos, frameRate, frameNumber, same result.

  


  UPDATE :
  
So I manage to get the frame with following code

  


  byte[] videoBytes = video.getBytes();
FFmpegFrameGrabber grabber = new FFmpegFrameGrabber(new ByteArrayInputStream(videoBytes));
grabber.setFormat("mp4");
int frameRate = (int) grabber.getFrameRate();
int targetFrameNumber = (int) (frameRate * timeLengthSeconds);

grabber.setFrameNumber(targetFrameNumber);
grabber.setVideoStream(0);
grabber.start();


Frame frame = grabber.grabImage();

grabber.stop();


  


  But another problem occurred

  


  A fatal error has been detected by the Java Runtime Environment:

EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x000001dd6cac79d6, pid=20824, tid=21048 
 JRE version: Java(TM) SE Runtime Environment 18.9 (11.0.12+8) (build 11.0.12+8-LTS-237)
 Java VM: Java HotSpot(TM) 64-Bit Server VM 18.9 (11.0.12+8-LTS-237, mixed mode, tiered, compressed oops, g1 gc, windows-amd64)
 Problematic frame:
 J 657 c1 jdk.internal.misc.Unsafe.getByte(J)B java.base@11.0.12 (7 bytes) @ 0x000001dd6cac79d6 [0x000001dd6cac79a0+0x0000000000000036]


  


  Any help is appreciated !

  


• Spring content + MPD manifest and Dash.js player [closed]

  31 octobre 2024, par Iupa

  I'm total newbie to video content from web, however I was curious how those things work actually, and I found so far that for web pages there are already js libs which firstly customize the video html tag to support many features like resolution/subtitles/speed etc,secondly they work with specific manifest file as a src for video, it's *.mpd extension and xml format where is described how to play the chunks of video, now in order to generate such manifests I need another libs like ffmpeg that can generate not only manifests but the chunks as well in different resolutions and other tons of settings (kinda crazy ¯_(ツ)_/¯), anyway now I understood that in order to use spring content lib I need to generate all of those during the uploads of files, are there some tutorials/best practices for such ?

  


• Where to (long time) host Spring Boot Application with Data Base Backup and Linux Root Access [closed]

  22 mai 2024, par Lord Helmchen

  I developed a small application for my father. It uses Spring Boot, MySQL and FFMPEG, which I currently installed on Linux.

  


  I want to host it, deploy it automatically, have a back up and root access for FFMPEG installation.

  


  It runs smoothly locally on Windows / Linux, now I want to host it somewhere.

  


  What I would like to have :

  


  

  • Ease of deployment : I got experience in adminstration of linux root servers, but I look for something easy to integrate and maybe automatically deploy it from Github or Gitlab

  


  • Backup : I want to backup the database ideally to another service provider in case something goes wrong.

  


  • Linux : One Part of it, amongs others is to convert different audio formats using ffmpeg.
So, (I think) I need linux root access as well.

  


  • Time Horzion : I would like to make sure it still runs in ten+ years, so it should be a reliable provider where I only update the application from time to time if needed.

  


  • Money : As it is only for personal use at this moment, I don't want to invest a fortune.

  


  


  What provider and deployment pipeline would you recommend to me ?