Recherche avancée

Sur d’autres sites (3739)

• When using ffmpeg.exe to create video from sequence of images the result is avi file that show green color why ?

  9 janvier 2014, par user3163653

  In Form1 im taking screenshots of my screen I checked they are ok i save them to the hard disk and see they are ok.

  private void timer1_Tick(object sender, EventArgs e)
  
          {
  
  
  
              using (bitmap = (Bitmap)ScreenCapture.CaptureScreen(true))
  
              {
  
  
  
              Image mScreenImage = new Bitmap(Screen.PrimaryScreen.Bounds.Width,
  
                                       Screen.PrimaryScreen.Bounds.Height);
  
              Graphics g = Graphics.FromImage(bitmap);
  
              g.CopyFromScreen(0, 0, 0, 0, new Size(bitmap.Width, bitmap.Height));
  
              g.Dispose();
  
                  bitmap.Save(@"D:\Testbmp\" + counter.ToString("D6") + ".jpg", ImageFormat.Jpeg);
  
                  counter++;
  
              ffmp.PushFrame((Bitmap)mScreenImage);
  
  
  
              }
  
  
  
          }

  Then in the new class ffmp im using pipe to get the screenshots and build the avi file in real time :

  using System;
  
  using System.Windows.Forms;
  
  using System.Collections.Generic;
  
  using System.Linq;
  
  using System.Text;
  
  using System.Threading.Tasks;
  
  using System.Drawing;
  
  using System.IO.Pipes;
  
  using System.Runtime.InteropServices;
  
  using System.Diagnostics;
  
  using System.IO;
  
  
  
  namespace ScreenVideoRecorder
  
  {
  
      class Ffmpeg
  
      {
  
          NamedPipeServerStream p;
  
          String pipename = "mytestpipe";
  
          System.Diagnostics.Process process;
  
          string ffmpegFileName = "ffmpeg.exe";
  
          string workingDirectory;
  
  
  
          public Ffmpeg()
  
          {
  
              workingDirectory = Path.GetDirectoryName(Application.ExecutablePath);
  
              Logger.Write("workingDirectory: " + workingDirectory);
  
              if (!Directory.Exists(workingDirectory))
  
              {
  
                  Directory.CreateDirectory(workingDirectory);
  
              }
  
              ffmpegFileName = Path.Combine(workingDirectory, ffmpegFileName);
  
              Logger.Write("FfmpegFilename: " + ffmpegFileName);
  
          }
  
  
  
          public void Start(string pathFileName, int BitmapRate)
  
          {
  
              try
  
              {
  
  
  
                  string outPath = pathFileName;
  
                  p = new NamedPipeServerStream(pipename, PipeDirection.Out, 1, PipeTransmissionMode.Byte);
  
  
  
                  ProcessStartInfo psi = new ProcessStartInfo();
  
                  psi.WindowStyle = ProcessWindowStyle.Hidden;
  
                  psi.UseShellExecute = false;
  
                  psi.CreateNoWindow = false;
  
                  psi.FileName = ffmpegFileName;
  
                  psi.WorkingDirectory = workingDirectory;
  
                  psi.Arguments = @"-f rawvideo -pix_fmt yuv420p -video_size 1920x1080 -i \\.\pipe\mytestpipe -map 0 -c:v mpeg4 -r " + BitmapRate + " " + outPath;
  
                  process = Process.Start(psi);
  
                  process.EnableRaisingEvents = false;
  
                  psi.RedirectStandardError = true;
  
                  p.WaitForConnection();
  
              }
  
              catch (Exception err)
  
              {
  
                  Logger.Write("Exception Error: " + err.ToString());
  
              }
  
          }
  
  
  
          public void PushFrame(Bitmap bmp)
  
          {
  
              try
  
              {
  
                  int length;
  
                  // Lock the bitmap's bits.
  
                  //bmp = new Bitmap(1920, 1080);
  
                  Rectangle rect = new Rectangle(0, 0, bmp.Width, bmp.Height);
  
                  //Rectangle rect = new Rectangle(0, 0, 1280, 720);
  
                  System.Drawing.Imaging.BitmapData bmpData =
  
                      bmp.LockBits(rect, System.Drawing.Imaging.ImageLockMode.ReadOnly,
  
                      bmp.PixelFormat);
  
  
  
                  int absStride = Math.Abs(bmpData.Stride);
  
                  // Get the address of the first line.
  
                  IntPtr ptr = bmpData.Scan0;
  
  
  
                  // Declare an array to hold the bytes of the bitmap.
  
                  //length = 3 * bmp.Width * bmp.Height;
  
                  length = absStride * bmpData.Height;
  
                  byte[] rgbValues = new byte[length];
  
  
  
                  //Marshal.Copy(ptr, rgbValues, 0, length);
  
                  int j = bmp.Height - 1;
  
                  for (int i = 0; i < bmp.Height; i++)
  
                  {
  
                      IntPtr pointer = new IntPtr(bmpData.Scan0.ToInt32() + (bmpData.Stride * j));
  
                      System.Runtime.InteropServices.Marshal.Copy(pointer, rgbValues, absStride * (bmp.Height - i - 1), absStride);
  
                      j--;
  
                  }
  
                  p.Write(rgbValues, 0, length);
  
                  bmp.UnlockBits(bmpData);
  
              }
  
              catch(Exception err)
  
              {
  
                  Logger.Write("Error: " + err.ToString());
  
              }
  
  
  
          }
  
  
  
          public void Close()
  
          {
  
              p.Close();
  
          }
  
      }
  
  }

  This is the arguments im using now :

  psi.Arguments = @"-f rawvideo -pix_fmt yuv420p -video_size 1920x1080 -i \\.\pipe\mytestpipe -map 0 -c:v mpeg4 -r " + BitmapRate + " " + outPath;

  Before that I tried to use libx264 instead the mpeg4 but it didn't create the avi file good.
  The problem is that the avi file on the hard disk when I play it show just green color.
  I can play any other avi files on my hard disk but when playing this avi file I see green.

  

  And this is what I see when im playing the avi file :

  

  I tried to use Gspot to find if I need any codec to install and this is what I see :

  

  And I have ffdshow installed already so what should I do now ?

• About Ffmpeg,Console show 'frame=0 fps=0.0 q=0.0 Lsize=0kB time=00:00:00.00' No data pull&push

  9 janvier 2019, par Lus

  I want to use Ffmpeg to pull&push video stream from HLS to RTMP.at first it’s normal,but when I open more,it’s run normally ,but no video data pull&push

  Environment：Windows64+Ngg-§rtmp-static+Ffmpeg-static+Java1.8

  It’s useless,even if I restart rtmp-server.

  ffmpeg -i xxx/live.m3u8 -vcodec h264-s 720*480 -an -f flv -y rtmp://xxx

  The first few video streams is normal,but when I open more streams (5+),
  it run normally,but no data pull.like this.

  2019-01-08 10:58:15.658  INFO ->frame=0 fps=0.0 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 drop=720 speed=   0x
  
  2019-01-08 10:58:16.598  INFO ->[http @ 0000015efc568280] Opening 'xxx/1/live.m3u8' for reading
  
  2019-01-08 10:58:16.984  INFO ->[http @ 0000015efb1200c0] Opening 'xxx/1/seghik30.ts' for reading
  
  2019-01-08 10:58:17.083  INFO ->frame=    0 fps=0.0 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 drop=744 speed=   0x    
  
  2019-01-08 10:58:18.033  INFO ->[http @ 0000015efc568280] Opening 'xxx/1/live.m3u8' for reading
  
  2019-01-08 10:58:18.146  INFO ->[http @ 0000015efb1200c0] Opening 'xxx/1/seghik31.ts' for reading
  
  2019-01-08 10:58:18.267  INFO ->frame=    0 fps=0.0 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 drop=770 speed=   0x    
  
  2019-01-08 10:58:19.220  INFO ->[http @ 0000015efc568280] Opening 'xxx/1/live.m3u8' for reading
  
  2019-01-08 10:58:19.317  INFO ->[http @ 0000015efb1200c0] Opening 'xxx/1/seghik32.ts' for reading
  
  2019-01-08 10:58:19.415  INFO ->[http @ 0000015efb138600] Opening 'xxx/1/seghik33.ts' for reading
  
  2019-01-08 10:58:19.494  INFO ->frame=    0 fps=0.0 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 drop=795 speed=   0x    
  
  2019-01-08 10:58:20.375  INFO ->[http @ 0000015efc568280] Opening 'xxx/1/live.m3u8' for reading
  
  2019-01-08 10:58:20.486  INFO ->[http @ 0000015efb138600] Opening 'xxx/1/seghik34.ts' for reading

• Crop layout for Videos using touch for a Video Editor like Video Show or Filmora Go in android studio [closed]

  26 août 2020, par Rayhan Khan

  I am new to the android studio (Java) and video editing application. I am developing a video editor in android studio with FFMpeg Library.

  


  I want to create a crop layout with a rectangle layer on top of it to measure the details like :

  


  

crop video width : 900
crop video height : 500
left distance (x value) : 190
top distance (y value) : 110

                                    1280
****************************************************************************
*FULL VIDEO                           |                                    *
*                                    110                                   *
*                                     |                                    *
*            **************************************************            *
*            *                       900                      *            *
*            *                                                *            *
*            *                                                *            *
*            *                                                *            *
*            *                                                *            *
*            *                                                *            *
*----190-----*                     CONTENT                500 *----190-----* 720
*            *                                                *            *
*            *                                                *            *
*            *                                                *            *
*            *                                                *            *
*            *                                                *            *
*            **************************************************            *
*                                     |                                    *
*                                    110                                   *
*                                     |                                    *
****************************************************************************


  


  Please help. Thank you.

  


  Screenshot 1 :

  


  

  


  Screenshot 2 :