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• JavaCV FFmpegFrameRecorder Video output reddish color

  14 juin 2016, par Diego Perozo

  I am trying to make a video .mp4 file out of a group of images using FFmpegFrameRecorder as a part of a bigger program, so I set up a test project in which I try to make a video out of 100 instances of the same frame at 25fps. The program seems to work. However, every time I run it the image seems to be reddish. As if a red filter had been applied to it.

  Here’s the code snippet :

  public static void main(String[] args) {
  
      File file = new File("C:/Users/Diego/Desktop/tc-images/image0.jpg");
  
      BufferedImage img = null;
  
      try {
  
          img = ImageIO.read(file);
  
      } catch (IOException e1) {
  
          e1.printStackTrace();
  
      }
  
      IplImage image = IplImage.createFrom(img); 
  
      FFmpegFrameRecorder recorder = new FFmpegFrameRecorder("C:/Users/Diego/Desktop/tc-images/test.mp4",1920,1080); 
  
      try { 
  
      recorder.setVideoCodec(13);
  
      recorder.setFormat("mp4");
  
      recorder.setPixelFormat(0);
  
      recorder.setFrameRate(25);
  
      recorder.start(); 
  
      for (int i=0;i<100;i++){ 
  
      recorder.record(image); 
  
      } 
  
      recorder.stop(); 
  
      } 
  
      catch (Exception e){ 
  
      e.printStackTrace(); 
  
      } 
  
  }

  I’d appreciate it if anybody told me what’s wrong. Thanks in advance for any help.

• ffmpeg combine images and audio into video and loop through images until end of audio

  12 avril 2022, par george

  I have found this code to combine multiple images and one audio file into video, but what I want is the images to loop until the end of audio. So what I mean, if I have 5 images and each image is shown for 5 seconds, after 25 seconds show again the first image, second image etc and this will continue until the end of audio.

  


  ffmpeg -r 0.2 -i Scan-130802-%04d.jpg -i "1.mp3" \
       -vcodec libx264 -vf scale=1920:1080 \
       -crf 25 -preset slow -acodec copy video.mp4


  


  another problem I have is that with the above code the images appear horizontally flipped for some reason.

  


• FFMPEG Merge two videos into one with side-by-side same quality output

  25 avril 2023, par Filip Kafo Kaučiarik

  I'm already working on project with 3d video and I have a problem, I got left and right channel of video and I need to merge them into side by side. I already read some blogs about this problem and I got this code :

  


  ffmpeg -i avatar35l.avi -vf "movie=avatar35r.avi [in1]; [in]pad=1920*2:1080[in0]; [in0][in1] overlay=1920:0 [out]" avatar35sbs.avi


  


  It works, but there is significant quality loss and I need the quality of the output video to be the same as the input video : 30fps, 1080p, same length. I'm new to ffmpeg and i need a concrete example of that.

  


  Can anybody help me ?