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• Kill a process started by exec() after some duration and store frames in an array

  19 février 2013, par asprin

  Let me start off by saying that I'm completely new to Java. I'm from PHP background, but it so happens that one of my PHP tasks need to be converted into Java.

  The task is splitting a video into frames using ffmpeg and then working with those frames. I've completed this process in PHP. And now I can to convert it into Java.

  I went over some tutorials and have got the bases covered (Using IDE, Running a java program etc). I'm using Eclipse for this purpose.

  I've so far managed to start ffmpeg from withing a java program by using

  public static void main(String[] args) throws IOException {
  
  
  
      String livestream = "D:/video.mpg";
  
      String folderpth = "D:/frames";
  
      String cmd="D:/ffmpeg/bin/ffmpeg.exe -i "+ livestream +" -r 10 "+folderpth+"/image%d.jpg";
  
  
  
      //System.out.println(cmd);
  
      Runtime r = Runtime.getRuntime();
  
      Process p = r.exec(cmd); // this starts creating frames
  
     // and stores them on local disk
  
     // any way to store that frame name in array?
  
     // something like String[] frames = {"image%d.jpg"}
  
     // so that frames array contains image1.jpg, image2.jpg..and so on?
  
  
  
  }

  This is working fine, I'm getting the frames in the folder. Now what I want to do is kill the process after some, say 5 minutes, as the video is over 2 hours long and I don't want to have to go to the taskbar and kill the process manually. I also would like to know if there is a way to store the frame names created by ffmpeg into an array for future use.

  I tried using p.destroy() but that didn't stop the process at all. How would I go about using something similar like setTimeout() which is used in jQuery ?

  Some Metadata

  OS : Windows 7

  IDE : Eclipse

• avcodec/mjpegenc_common : Store approximate aspect if exact cannot be stored

  19 mars 2016, par Michael Niedermayer

  avcodec/mjpegenc_common : Store approximate aspect if exact cannot be stored
  Fixes Ticket5244
  Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
  

  • [DH] libavcodec/mjpegenc_common.c

• I need to create a streaming app Where videos store in aws S3

  27 juillet 2023, par abuzar zaidi

  I need to create a video streaming app. where my videos will store in S3 and the video will stream from the backend. Right now I am trying to use ffmpeg in the backend but it does not work properly.

  


  what am I doing wrong in this code ? And if ffmpeg not support streaming video that store in aws s3 please suggest other options.

  


  Backend

  


  const express = require('express');
const aws = require('aws-sdk');
const ffmpeg = require('fluent-ffmpeg');
const cors = require('cors'); 
const app = express();

//   Set up AWS credentials
aws.config.update({
accessKeyId: '#######################',
secretAccessKey: '###############',
region: '###############3',
});

const s3 = new aws.S3();
app.use(cors());

app.get('/stream', (req, res) => {
const bucketName = '#######';
const key = '##############'; // Replace with the key/path of the video file in the S3 bucket
const params = { Bucket: bucketName, Key: key };
const videoStream = s3.getObject(params).createReadStream();

// Transcode to HLS format
 const hlsStream = ffmpeg(videoStream)
.format('hls')
.outputOptions([
  '-hls_time 10',
  '-hls_list_size 0',
  '-hls_segment_filename segments/segment%d.ts',
 ])
.pipe(res);

// Transcode to DASH format and pipe the output to the response
ffmpeg(videoStream)
.format('dash')
.outputOptions([
  '-init_seg_name init-stream$RepresentationID$.mp4',
  '-media_seg_name chunk-stream$RepresentationID$-$Number%05d$.mp4',
 ])
.output(res)
.run();
});

const port = 5000;
app.listen(port, () => {
console.log(`Server running on http://localhost:${port}`);
});


  


  Frontend

  


      import React from &#x27;react&#x27;;&#xA;&#xA;    const App = () => {&#xA;     const videoUrl = &#x27;http://localhost:3000/api/playlist/runPlaylist/6c3e7af45a3b8a5caf2fef17a42ef9a0&#x27;; //          Replace with your backend URL&#xA;Please list down solution or option i can use here&#xA;    const videoUrl = &#x27;http://localhost:5000/stream&#x27;;&#xA;         return (&#xA;      <div>&#xA;      <h1>Video Streaming Example</h1>&#xA;      <video controls="controls">&#xA;        <source src="{videoUrl}" type="video/mp4"></source>&#xA;        Your browser does not support the video tag.&#xA;      </video>&#xA;    </div>&#xA;     );&#xA;     };&#xA;&#xA;    export default App;&#xA;