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• FFMPEG : How to mix different types of image sequence inputs when creating multiple streams

  9 août 2021, par chutlies

  I am using a piece of software that generates a .txt files with rendered images. The list within that txt files is printed with the word 'file' at the beginning of the file path.

  


  Ex : file 'file:C :/Users/User/Desktop/test/Test.0001.png'

  


  I am attempting to input another image sequence as an overlay. Everything works fine if I just overlay, scale, and render. So this works fine :

  


  ffmpeg -hide_banner -y -f concat -safe 0 -i C:/test/input.txt -i "C:/test/BALL.%04d.png" -filter_complex "overlay[4K_in];[4K_in]scale=1920:1080[hdOut]" -map [hdOut] hd.mp4


  


  But when I start to split the stream to create different outputs it will only render the overlayed stream [1:v] and not the composited image.

  


  ffmpeg -hide_banner -y -f concat -safe 0 -i C:/test/input.txt -i "C:/test/BALL.%04d.png" -filter_complex "overlay,split=3[mp4HD_in][mxf720_in][mov4K_in];[mp4HD_in]scale=1920:1080[mp4HD_out];[mxf720_in]scale=1280:720[mxf720_out];[mov4K_in]scale=3840:2160[mov4K_out]" -crf 16 -vcodec libx264 -map [mp4HD_out] C:/test/hdMP4.mp4 -vcodec prores -map [mov4K_out] C:/test/MOV4K.mov -vcodec dnxhd -pix_fmt yuv422p -b:v 75M -map [mxf720_out] C:test/MXF720.mxf


  


  If I remove 'file' from the frames file path in the .txt file it works.

  


  Ex : file 'C :/Users/User/Desktop/test/Test.0001.png'

  


  Unfortunately, I am unable to change this as it's being generated and run within a piece of software. Are there any flags or something that I need to add to get around this ? Any other possible techniques beyond starting another &&ffmpeg call to generate the streams over the overlay ?

  


  I do get this in the logs :&#xA;[concat @ 0000024a0eacf280] DTS -230584300921369 < 0 out of order&#xA;DTS -230584300921369, next:40000 st:0 invalid dropping&#xA;PTS -230584300921369, next:40000 invalid dropping st:0&#xA;DTS -230584300921369, next:40000 st:0 invalid dropping&#xA;PTS -230584300921369, next:40000 invalid dropping st:0&#xA;DTS -230584300921369, next:40000 st:0 invalid dropping&#xA;PTS -230584300921369, next:40000 invalid dropping st:0&#xA;DTS -230584300921369, next:40000 st:0 invalid dropping&#xA;PTS -230584300921369, next:40000 invalid dropping st:0&#xA;[image2 @ 0000024a0eadd140] Thread message queue blocking ; consider raising the thread_queue_size option (current value : 8)

  &#xA;

• How to stop ffmpeg video recording in c# ?

  23 octobre 2016, par 최영재

  I am using FFmpeg in application and it start and record video perfectly
  but when I want to stop it ask for press "q", I got a System.EntryPointNotFoundException Error message.

  How can I send message "q" to process which is in running state from application

      int key_q = 81; 
  
  
  
      [DllImport("user32.dll", EntryPoint = "postmessage")]       
  
      private static extern bool postmessage(IntPtr hwnd, uint msg, int wparam, int lparam);
  
  
  
  
  
  
  
      private void button_stop_Click(object sender, EventArgs e)
  
      {
  
            string process = "ffmpeg";
  
  
  
            Process[] pro = Process.GetProcessesByName("ffmpeg");
  
  
  
            pro[0].Refresh();
  
  
  
            IntPtr h = pro[0].MainWindowHandle;
  
  
  
  
  
  
  
            postmessage(h, 0x100, key_q, 0);
  
  
  
  
  
      }

• lavc : clarify thread_safe_callbacks doxy

  2 mars 2021, par Anton Khirnov

  lavc : clarify thread_safe_callbacks doxy
  State explicitly when this field will be removed and how to access it in
  
  a forward compatible way.
  

  • [DH] libavcodec/avcodec.h