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• 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

• 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.

• After video codec copy to mp4 format with ffmpeg,new video has no screen and has just audio

  19 juin 2018, par parsa

  I have an issue.sometimes when I convert video to mp4 with codec copy,my created video in chrome just has audio and it’s display a black screen, and in another browsers like firefox and internet explorer video doesn’t play.
  but I check this created video on my server and video displays.
  And here is my code in below

  ffmpeg -i -f mp4 -s 123.mov -codec copy 123.mp4 

  The Output Of ffprobe 123.mp4 is :

  Metadata:major_brand:isom
  
  minor_version :512
  
  compatible_brands:isomiso2mp41
  
  encoder:Lavf57.31.100
  
  Duration: 00:26:58.97, start: 0.000000, bitrate: 1334 kb/s
  
  Stream #0:0(und): Video: mpeg4 (Advanced Simple Profile) (mp4v / 0x7634706D)
  
  ,yuv420p, 640x480 [SAR 1:1 DAR 4:3],1200 kb/s, 29.97 fps,29.97 tbr, 30k tbn,29.97 tbc (default)
  
  Metadata:handler_name: VideoHandler
  
  Stream #0:1(und): Audio: mp3 (mp4a / 0x6134706D), 44100 Hz, stereo, s16p, 12
  
  7 kb/s (default)
  
  Metadata:handler_name: SoundHandler