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• avcodec/vdpau_hevc : Properly signal the num_delta_pocs from the SPS RPS

  13 juin 2015, par Philip Langdale

  avcodec/vdpau_hevc : Properly signal the num_delta_pocs from the SPS RPS
  This is the same fix that Hendrik made to dxva2_hevc. It should be
  
  equally required here, although I don’t see any visual difference.
  
  Nevertheless, best to stay consistent.
  

  • [DH] libavcodec/vdpau_hevc.c

• How do I make a C# win form program that breaks a video down to frames, then put those frames back together to make a video ?

  30 juillet 2015, par Atom Scott

  First, I’m fairly new to C sharp so I’m looking for a thorough and easy to understand answer.

  How do I make a C# win form program that breaks a video down to frames, then puts those frames back together to make a video ?
  I also want to be able to select which frames to extract by setting an interval time. For example, extract frames that are one second apart.
  Is this possible, I have done some research but I don’t understand how to use the codes displayed on the following websites.

  Supposedly code to breakdown video into frames. However I do not know where to put it. Do I make it the event for a button or something. From my own research I am guessing this uses ffmpeg. But I’m not exactly sure how to use ffmpeg, I have tried downloading Aforge, and use Aforge.Video.ffmpeg. But I’m stuck there.
  http://www.researchgate.net/post/Has_anyone_code_in_C_to_read_video_file_and_split_it_into_frames[^]

  Code for making a video from images, it looked promising so i tried to copy and paste it visual studio. However the line using BytescoutImageToVideoLib ; has an error asking me whether I am missing a reference. What reference am I missing ?
  http://bytescout.com/products/developer/imagetovideosdk/imagetovideosdk_first_step_with_visual_c_sharp_net.html[^]

  I also noticed that there was a page on code project for something similar to this, but the downloadable demo project didn’t work at all. I didnt see the point in spending time on something where the end product is broken.
  http://www.codeproject.com/Articles/13237/Extract-Frames-from-Video-Files

  Any help is greatly appreciated.

• Extracting frames from image in C#

  12 août 2015, par Atom Scott

  I`ve seen some stackover flow on how to do this but i cant get it to work for myself in visual studio.

  What is wrong with code ? I have downloaded FFMpeg and im using it as reference. yet, I get the error

  "Could not load file or assembly Aforge.Video.FFMPEG. dll or one of
  its dependencies"

  Here is the code.

  using System;
  
  using System.Collections.Generic;
  
  using System.ComponentModel;
  
  using System.Data;
  
  using System.Drawing;
  
  using System.Linq;
  
  using System.Text;
  
  using System.Threading.Tasks;
  
  using System.Windows.Forms;
  
  using AForge;
  
  using AForge.Video;
  
  using AForge.Video.FFMPEG;
  
  
  
  namespace WindowsFormsApplication6
  
  {
  
  public partial class Form1 : Form
  
  {
  
      public Form1()
  
      {
  
          InitializeComponent();
  
      }
  
  
  
      private void button1_Click(object sender, EventArgs e)
  
      {
  
          // create instance of video reader
  
          VideoFileReader reader = new VideoFileReader( );
  
          // open video file
  
          reader.Open( "test.avi" );
  
          // read 100 video frames out of it
  
          for ( int i = 0; i < 100; i++ )
  
          {
  
          Bitmap videoFrame = reader.ReadVideoFrame( );
  
  
  
          videoFrame.Save(i + ".bmp");
  
  
  
          // dispose the frame when it is no longer required
  
          videoFrame.Dispose( );
  
          }
  
          reader.Close( );
  
      }
  
  } 
  
  }

  The program stop when i click the button and comes with an error.