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• FFMPEG Cannot Open The Video File (C#)

  5 décembre 2016, par Landon Conway

  I want to make a software that can read a video file and extract all the frames to get them as bitmaps so I choose to use AForge FFMPEG. However, it does not seem to be working for me as it does for others ! When I try to use ’VideoFileReader.Open’ I get this exeption :

  "An unhanded exeption of type ’System.IO.IOExeption’ occurred in AForge.Video.FFMPEG.dll

  Additional Information : Cannot open the file."

  Regardless of which video file I try to open it does not work. I also tried to run as andministrator since it may not have access to that file.

  I’m using .NET Framework 4.6.1

  Here is my code :

  using AForge.Video.FFMPEG;
  
  using System;
  
  using System.Drawing;
  
  using System.IO;
  
  using System.Windows.Forms;
  
  namespace Test_Video_Software
  
  {
  
      public partial class
  
      {
  
          public Form1
  
          {
  
              InitializeComponent();
  
          }
  
          private void takeApartToolStripMenuItem_Click(object sender, EventArgs e)
  
          {
  
              VideoFileReader vfr = new VideoFileReader();
  
              vfr.Open(@"C:\Users\LC Creations\Videos\IMG_8722.MOV");
  
              Bitmap videoFrame = vfr.ReadVideoFrame();
  
          }
  
      }
  
  }

  I looked everywhere on the internet. Even here of coarse. Nobody seems to have had this issue in the past. Any help apreciated.

• How to send all traffic from tcp port 1935 through http_proxy ?

  4 mars 2021, par Karol Gruszka

  I'm using a server that uses an internal proxy to access the internet.
  
In my use case, I need to live stream an application using FFmpeg to a Restream.io using RTMP protocol which can be run using port 1935.

  


  The problem is that FFmpeg probably doesn't make any use of environment variables like $http_proxy and it's unable to resolve live.restream.io hostname.
  
So far I tried configuring proxychains by adding the internal proxy to the proxychains proxy list and it worked for a simple telnet connection without any problems - proxychains4 live.restream.io 1935 but seems like it's not going to work with FFmpeg.

  


  How can I make the TCP on port 1935 go through an internal proxy in order to reach the desired hostname ?

  


• ffmpeg image slideshow with zoompan and fade in/out

  15 mars 2017, par Kostas

  I’ve been trying ffmpeg through whatever tutorials i can find over the internet and I’m a bit puzzled as to how to combine a zoompan effect with fade in and fade out of a series of images. A got to the following after combining bits and pieces of examples I found but it looks like the result I get is sequential and not what I thought it would be. Any points to point me to the right direction would be appreciated.

  ffmpeg \ 
  
  -loop 1 -t 5 -i input/slideshow/img0001.jpeg 
  
  -loop 1 -t 5 -i input/slideshow/img0002.jpeg \
  
  -loop 1 -t 5 -i input/slideshow/img0003.jpeg \
  
  -loop 1 -t 5 -i input/slideshow/img0004.jpeg \
  
  -filter_complex \
  
  "[0:v]zoompan=z='if(lte(zoom,1.0),1.5,max(1.001,zoom-0.0015))':d=125,fade=t=out:st=4:d=1[v0]; \
  
   [1:v]zoompan=z='if(lte(zoom,1.0),1.5,max(1.001,zoom-0.0015))':d=125,fade=t=in:st=0:d=1,fade=t=out:st=4:d=1[v1]; \
  
   [2:v]zoompan=z='if(lte(zoom,1.0),1.5,max(1.001,zoom-0.0015))':d=125,fade=t=in:st=0:d=1,fade=t=out:st=4:d=1[v2]; \
  
   [3:v]zoompan=z='if(lte(zoom,1.0),1.5,max(1.001,zoom-0.0015))':d=125,fade=t=in:st=0:d=1,fade=t=out:st=4:d=1[v3]; \
  
   [v0][v1][v2][v3]concat=n=4:v=1:a=0,format=yuv420p[v]" -map "[v]" -s "800x450" -t 40 output/out_fade.mp4