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• ffmpeg : use display matrix frame side data for autorotation

  8 septembre 2021, par James Almer

  ffmpeg : use display matrix frame side data for autorotation
  And give it priority over stream side data when present.
  
  Fixes part of ticket #6945.
  Signed-off-by : James Almer <jamrial@gmail.com>
  

  • [DH] fftools/cmdutils.c
  • [DH] fftools/cmdutils.h
  • [DH] fftools/ffmpeg.c
  • [DH] fftools/ffmpeg.h
  • [DH] fftools/ffmpeg_filter.c
  • [DH] fftools/ffplay.c

• How to Save and Display a Video Simultaneously using C# Aforge.NET framework ?

  8 avril 2014, par Akshay

  I am able to display the video from my webcam or any other integrated device into a picturebox . Also i am able to Save the video into an avi file using FFMPEG DLL files.
  I want to do both things simultaneously ie Save the video in the avi file as well as at the same time display the live feed too.
  This is for a surveillance project where i want to monitor the live feed and save those too.

  using System;
  
  using System.Collections.Generic;
  
  using System.ComponentModel;
  
  using System.Data;
  
  using System.Drawing;
  
  using System.Text;
  
  using System.Windows.Forms;
  
  
  
  using AForge.Video;
  
  using AForge.Video.DirectShow;
  
  using AForge.Video.FFMPEG;
  
  using AForge.Video.VFW;
  
  using System.Drawing.Imaging;
  
  using System.IO;
  
  
  
  namespace cam_aforge1
  
  {
  
  public partial class Form1 : Form
  
  {
  
      private bool DeviceExist = false;
  
      private FilterInfoCollection videoDevices;
  
      private VideoCaptureDevice videoSource = null;
  
  
  
      public Form1()
  
      {
  
          InitializeComponent();
  
      }
  
  
  
      private void getCamList()
  
      {
  
          try
  
          {
  
              videoDevices = new FilterInfoCollection(FilterCategory.VideoInputDevice);
  
              comboBox1.Items.Clear();
  
              if (videoDevices.Count == 0)
  
                  throw new ApplicationException();
  
  
  
              DeviceExist = true;
  
              foreach (FilterInfo device in videoDevices)
  
              {
  
                  comboBox1.Items.Add(device.Name);
  
              }
  
              comboBox1.SelectedIndex = 0; //make dafault to first cam
  
          }
  
          catch (ApplicationException)
  
          {
  
              DeviceExist = false;
  
              comboBox1.Items.Add("No capture device on your system");
  
          }
  
      }
  
  
  
      private void rfsh_Click(object sender, EventArgs e)
  
      {
  
          getCamList();
  
      }
  
  
  
      private void start_Click(object sender, EventArgs e)
  
      {
  
          if (start.Text == "&Start")
  
          {
  
              if (DeviceExist)
  
              {
  
                  videoSource = new VideoCaptureDevice(videoDevices[comboBox1.SelectedIndex].MonikerString);
  
                  videoSource.NewFrame += new NewFrameEventHandler(video_NewFrame);
  
                  videoSource.NewFrame += new NewFrameEventHandler(video_NewFrameSave);
  
                  CloseVideoSource();
  
                  videoSource.DesiredFrameSize = new Size(160, 120);
  
                  //videoSource.DesiredFrameRate = 10;
  
                  videoSource.Start();
  
                  label2.Text = "Device running...";
  
                  start.Text = "&Stop";
  
                  timer1.Enabled = true;
  
              }
  
              else
  
              {
  
                  label2.Text = "Error: No Device selected.";
  
              }
  
          }
  
          else
  
          {
  
              if (videoSource.IsRunning)
  
              {
  
                  timer1.Enabled = false;
  
                  CloseVideoSource();
  
                  label2.Text = "Device stopped.";
  
                  start.Text = "&Start";                    
  
              }
  
          }
  
      }
  
      private void video_NewFrame(object sender, NewFrameEventArgs eventArgs)
  
      {
  
          Bitmap img = (Bitmap)eventArgs.Frame.Clone();
  
          pictureBox1.Image = img;
  
      }
  
  
  
      Bitmap imgsave;
  
      private void video_NewFrameSave(object sender, NewFrameEventArgs eventArgs)
  
      {
  
          imgsave = (Bitmap)eventArgs.Frame.Clone();
  
      }
  
  
  
      private void CloseVideoSource()
  
      {
  
          if (!(videoSource == null))
  
              if (videoSource.IsRunning)
  
              {
  
                  videoSource.SignalToStop();
  
                  videoSource = null;
  
              }
  
      }
  
  
  
      private void timer1_Tick(object sender, EventArgs e)
  
      {
  
          label2.Text = "Device running... " + videoSource.FramesReceived.ToString() + " FPS";
  
      }
  
  
  
      private void Form1_FormClosed(object sender, FormClosedEventArgs e)
  
      {
  
          CloseVideoSource();
  
      }
  
  
  
      private void Form1_Load(object sender, EventArgs e)
  
      {
  
  
  
      }
  
  
  
      VideoFileWriter writer;
  
  
  
      private void button1_Click(object sender, EventArgs e)
  
      {
  
          int width = 640;
  
          int height = 480;
  
          writer = new VideoFileWriter();
  
          writer.Open("test.avi", width, height, 75, VideoCodec.MPEG4);
  
          for (int i = 0; i < 5000; i++)
  
          {
  
              writer.WriteVideoFrame(imgsave);
  
          }
  
  
  
      }
  
  
  
      private void button2_Click(object sender, EventArgs e)
  
      {
  
          writer.Close();
  
      }
  
  
  
  }
  
  }

  Thanks in advance.

• libavcodec/qsv.c : Issue fixed : QSV engine does not release display handler under...

  13 juillet 2015, par Ivan Uskov

  libavcodec/qsv.c : Issue fixed : QSV engine does not release display handler under linux platform.
  Reviewed-by : Gwenole Beauchesne <gb.devel@gmail.com>
  
  Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
  

  • [DH] libavcodec/qsv.c
  • [DH] libavcodec/qsv_internal.h
  • [DH] libavcodec/qsvdec.c
  • [DH] libavcodec/qsvdec.h
  • [DH] libavcodec/qsvenc.c
  • [DH] libavcodec/qsvenc.h