Sur d’autres sites (5385)

• ImageIO.write() freezes after 540 iterations

  14 octobre 2019, par the4naves

  I’m currently trying to write a simple audio visualizer (Non realtime), but am running into a very weird problem.

  After about 515-545 iterations of ImageIO.write(), the program freezes ; no exceptions, the program doesn’t crash, just, nothing.

  Before you read the code below, here’s a quick rundown of it to make it a bit easier to understand :
  1. Load data from program arguments.
  2. Start ffmpeg with its input set to stdin.
  3. In a loop ; Continually render an image, then send it to ffmpeg with ImageIO.write().

  Other info :
  I’ve verified ImageIO.write() IS actually the problem by placing a print before and after the try/catch statement.
  My first thought was a memory leak, but that doesn’t seem to be the case, at least according to Runtime.getRuntime().freeMemory() ;
  The iterations needed to freeze the program is inconsistent, though its always been in the range of 515-540.
  Rendering a video with less frames works flawlessly.
  My previous solution was to write all images to a folder, then run ffmpeg on them all at once. This worked fine on any number of frames, but used upwards of a gigabyte of storage for a fairly small test video, unacceptable for the small program I’m trying to create.

  As a final note, I realize the code probably has a ton of optimization/general problems, I haven’t had the time to try and get it to work well, as it isn’t even fully working yet.
  With that said, if you see any obvious problems, feel free to include them in your answer if you have the time, it’ll certainly save me some.

  Thanks

  public class Run {
  
  
  
      public static BufferedImage render = new BufferedImage(1920, 1080, BufferedImage.TYPE_INT_RGB);
  
  
  
      public static Graphics buffer = render.getGraphics();
  
  
  
      public static int frame = 0;
  
  
  
      public static double[] bins = new double[3200];
  
      public static double[] previousBins = new double[3200];
  
  
  
      public static File audio;
  
  
  
      public static BufferedImage background;
  
  
  
      public static OutputStream output;
  
  
  
      public static void main(String[] args) {
  
          try {
  
              String command = "cd /Users/admin/Desktop/render ; ffmpeg -r 60 -blocksize 150000 -i pipe:0 -i " + args[1].replaceAll(" ", "\\\\ ") + " final.mp4";
  
  
  
              System.out.println(command);
  
  
  
              ProcessBuilder processBuilder = new ProcessBuilder("bash", "-c", command);
  
  
  
              Process process = processBuilder.start();
  
  
  
              output = process.getOutputStream();
  
          } catch (IOException e) {
  
              e.printStackTrace();
  
          }
  
  
  
          try {
  
              background = ImageIO.read(new File(args[0]));
  
          } catch (IOException e) {
  
              System.out.println("File not found");
  
          }
  
  
  
          audio = new File(args[1]);
  
  
  
          ByteArrayOutputStream out = new ByteArrayOutputStream();
  
          BufferedInputStream in = null;
  
  
  
          try { in = new BufferedInputStream(new FileInputStream(audio));
  
          } catch (FileNotFoundException e1) {
  
              e1.printStackTrace();
  
          }
  
  
  
          try {
  
              out.flush();
  
  
  
              int read;
  
  
  
              byte[] buff = new byte[3200];
  
  
  
              while ((read = in .read(buff)) > 0) {
  
                  out.write(buff, 0, read);
  
              }
  
          } catch (IOException e1) {
  
              e1.printStackTrace();
  
          }
  
  
  
          byte[] audioBytes = out.toByteArray();
  
  
  
          System.out.println("Calculating length");
  
  
  
          int frames = 600;
  
  
  
          System.out.println("Rendering images");
  
  
  
          int[] data = new int[3200];
  
  
  
          int index = 0;
  
  
  
          while (frame < frames) {
  
              for (int i = 0; i < 3200; i++) {
  
                  data[i] = (short)(audioBytes[index + 2] << 16 | audioBytes[index + 1] << 8 | audioBytes[index] & 0xff);
  
  
  
                  index += 3;
  
              }
  
  
  
              index -= 4800;
  
  
  
              fourier(data, bins);
  
  
  
              renderImage();
  
  
  
              try {
  
                  ImageIO.write(render, "jpg", output);
  
              } catch (IOException e) {
  
                  e.printStackTrace();
  
              }
  
  
  
              frame++;
  
  
  
              if (frame % 20 == 0) {
  
                  System.out.println(frame + "/" + frames + " frames completed");
  
              }
  
          }
  
  
  
          System.out.println("Render completed");
  
  
  
          System.out.println("Optimizing file size");
  
  
  
          System.out.println("Optimization complete");
  
  
  
          System.out.println("Program complete");
  
  
  
          System.exit(0);
  
      }
  
  
  
      public static void renderImage() {
  
          buffer.drawImage(background, 0, 0, null);
  
  
  
          for (int i = 0; i < 110; i++) {
  
              int height = (int)((bins[i] + previousBins[i]) / Short.MAX_VALUE);
  
  
  
              buffer.fillRect(15 * i + 20, 800 - height, 10, (int)(height * 1.2));
  
          }
  
  
  
          System.arraycopy(bins, 0, previousBins, 0, 3200);
  
      }
  
  
  
      public static void fourier(int[] inReal, double[] out) {
  
          for (int k = 0; k < inReal.length; k++) {
  
              double real = 0.0;
  
              double imaginary = 0.0;
  
  
  
              for (int t = 0; t < inReal.length; t++) {
  
                  real += inReal[t] * Math.cos(2 * Math.PI * t * k / inReal.length);
  
                  imaginary -= inReal[t] * Math.sin(2 * Math.PI * t * k / inReal.length);
  
              }
  
  
  
              out[k] = Math.sqrt(Math.pow(real, 2) + Math.pow(imaginary, 2));
  
          }
  
      }
  
  
  
  }

• ffmpeg /dev/video1 : No space left on device

  4 avril 2017, par chaitanya kiran

  While converting and redirecting USB camera stream to a multicast ip I’m facing below error.

  ffmpeg -f v4l2 -i /dev/video1 -s 720x480 -pix_fmt yuv420p -c:v mpeg2video -aspect 4:3 -r 30 -g 15 -ar 0 -streamid 0:48 -bf 2 -b:v 100k -bufsize 400k -maxrate 3825k -f rtp_mpegts rtp ://239.0.2.2:5001

  ffmpeg version 3.2.4-static http://johnvansickle.com/ffmpeg/ Copyright (c) 2000-2017 the FFmpeg developers
  built with gcc 5.4.1 (Debian 5.4.1-5) 20170205
  configuration : —enable-gpl —enable-version3 —enable-static —disable-debug —disable-ffplay —disable-indev=sndio —disable-outdev=sndio —cc=gcc-5 —enable-fontconfig —enable-frei0r —enable-gnutls —enable-gray —enable-libass —enable-libfreetype —enable-libfribidi —enable-libmp3lame —enable-libopencore-amrnb —enable-libopencore-amrwb —enable-libopenjpeg —enable-libopus —enable-librtmp —enable-libsoxr —enable-libspeex —enable-libtheora —enable-libvidstab —enable-libvo-amrwbenc —enable-libvorbis —enable-libvpx —enable-libwebp —enable-libx264 —enable-libx265 —enable-libxvid —enable-libzimg
  libavutil 55. 34.101 / 55. 34.101
  libavcodec 57. 64.101 / 57. 64.101
  libavformat 57. 56.101 / 57. 56.101
  libavdevice 57. 1.100 / 57. 1.100
  libavfilter 6. 65.100 / 6. 65.100
  libswscale 4. 2.100 / 4. 2.100
  libswresample 2. 3.100 / 2. 3.100
  libpostproc 54. 1.100 / 54. 1.100

  [video4linux2,v4l2 @ 0xb982f80] ioctl(VIDIOC_STREAMON) : No space left on device
  /dev/video1 : No space left on device

  Below are top and free -m command outputs

  top

  top - 20:10:13 up 16 min, 4 users, load average : 0.49, 0.37, 0.28
  Tasks : 257 total, 1 running, 256 sleeping, 0 stopped, 0 zombie
  %Cpu(s) : 3.4 us, 0.2 sy, 0.0 ni, 95.9 id, 0.5 wa, 0.0 hi, 0.0 si, 0.0 st
  KiB Mem : 13457292 total, 12299768 free, 650672 used, 506852 buff/cache
  KiB Swap : 3670012 total, 3670012 free, 0 used. 12710776 avail Mem

  PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
  4095 root 20 0 333376 153296 138660 S 25.9 1.1 1:09.41 ffmpeg
  1551 root 20 0 84804 40076 17756 S 0.7 0.3 0:24.00 Xorg.bin
  2574 user 20 0 66900 27436 21268 S 0.7 0.2 0:11.30 gnome-terminal-
  4373 root 20 0 7800 3852 3196 R 0.7 0.0 0:00.03 top
  610 root 20 0 0 0 0 S 0.3 0.0 0:00.03 kworker/4:2
  3762 user 20 0 816928 217120 75100 S 0.3 1.6 0:56.34 firefox
  4240 root 20 0 0 0 0 S 0.3 0.0 0:02.24 kworker/0:2
  1 root 20 0 27464 7508 5044 S 0.0 0.1 0:01.95 systemd
  2 root 20 0 0 0 0 S 0.0 0.0 0:00.00 kthreadd
  3 root 20 0 0 0 0 S 0.0 0.0 0:00.00 ksoftirqd/0
  5 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 kworker/0:0H
  7 root 20 0 0 0 0 S 0.0 0.0 0:01.29 rcu_sched

  free -m

            total        used        free      shared  buff/cache   available

  Mem : 13141 621 12025 2 495 12426
  Swap : 3583 0 3583

  cat /proc/meminfo |grep -i vmalloc

  VmallocTotal : 524288 kB
  VmallocUsed : 204736 kB
  VmallocChunk : 316560 kB

  P.S: : There is already an instance of ffmpeg running on the machine on /dev/video0.

  Any help in resolving issue would be greatly appreciated

• Recording a website with PhantomJS and FFMpeg ?

  18 novembre 2016, par Rjaibi Mejdi

  I want to record a website using Phantomjs and use pipeline and FFMpeg to create a live video (Server or Stream URL)

  runner.js code :

  var page = require('webpage').create();
  
  page.viewportSize = { width: 640, height: 480 };
  
  
  
  page.open('http://www.goodboydigital.com/pixijs/examples/12-2/', function () {
  
    setInterval(function() {
  
      page.render('/dev/stdout', { format: "png" });
  
    }, 25);
  
  });

  Commande Line :

  $ phantomjs runner.js | ffmpeg -y -c:v png -f image2pipe -r 24 -i - -c:v libx264 -pix_fmt yuv420p -threads 10 -movflags +faststart -b:v 3500k -bufsize 1024k -f flv "rtmp://rtmp-api.facebook.com:80/rtmp/1734882043502131?ds=1&s_l=1&a=AaYJ7cQfH719X5Kl"

  The problem is that I get this error when I want to start a live stream in facebook :
   In the preview mode is working
  
   When I start the Live I got this message