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• ffmpeg : combine filter_complex trim, overlay and concat

  4 octobre 2015, par jb_alvarado

  I try to combine different video and audio clips with trimming and a logo on top.

  My syntax looks like this :

  ffmpeg -i "$introVid" -i "$introAud" -i "$mainVid" -i "$mainAud" -i "$outroVid" -i "$outroAud" -i "$logo" -i "$mainVid" -i "$mainAud" \
  
  -filter_complex \
  
  "[2:0]trim=0.4:60[trimV1]; \
  
   [3:0]atrim=0.4:60[trimA1]; \
  
   [trimV1][6:v]overlay=main_w-overlay_w-20:15,fade=in:s=2:d=0.5:alpha=1,fade=out:s=60:d=0.5:alpha=1[fade]; \
  
   [7:0]trim=60.2:72[trimV2]; [8:0]atrim=60.2:72[trimA2]; \
  
   [0:0] [1:0] [fade] [trimA1] [4:0] [5:0] [trimV2] [trimA2] concat=n=4:v=1:a=1[cv][a]; \
  
   [cv]scale=864:480:flags=gauss:interl=0[scal]" \
  
  -map "[scal]" -map "[a]" -pix_fmt yuv420p -c:v libx264 -preset fast -y "$out"

  It works mostly, but the problem is that I get a black video, with the same length then the main video, on the 3rd place. Interesting is also, when I watch the ffmpeg process, it hangs shortly on time 1:26min and then it jumps to 2:40min. Normally the complete test video have around 1:30min.

  The output what I get is at the moment :

  ([intro][trimmed main with logo][black video][outro][credits]) <- the black video part is to much.

• xcbgrab : Use the correct geometry for the region highlight

  4 février 2015, par Daniel Moran

  xcbgrab : Use the correct geometry for the region highlight
  The feature is implemented using a transparent window and drawing
  
  inside it a rectangle filling the whole window to highlight it.
  Signed-off-by : Luca Barbato <lu_zero@gentoo.org>
  

  • [DBH] libavdevice/xcbgrab.c

• 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.