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• FFMPEG : How to extract a PNG sequence from a video, remove duplicate frames in the process and keep the original frame number ?

  16 mai 2020, par Simon

  I have a recording of an old game which has variable framerate. Since I want to process individual frames to upscale and modernize the footage I would like to avoid any duplicate frames. I know that I can use this function to extract all frames from a video :

  



  ffmpeg -i input.mov -r 60/1 out%04d.png


  



  And I know that I can remove duplicate frames using this function :

  



  ffmpeg -i input.mov -vf mpdecimate,setpts=N/FRAME_RATE/TB output.mov


  



  However, the above command removes duplicate frames and puts frames next to each other whereas in order to keep a timecode of sorts it would be a lot more useful to be able to extract PNGs with frame number (video is progressive 60fps) but without all of the duplicates.

  



  So, the question is : what if I want to extract PNG files BUT maintain the original corresponding framenumber within the sequence ? So, if we have a video with 10 frames and frames 2-8 are duplicates it spits out 1.png 2.png 9.png and 10.png ? How do I combine both bits of code listed above ?

  


• how to add subtitle and watermark on multi videos at same time in ffmpeg ?

  16 novembre 2020, par shadymelad

  i want to know how to add sutitle and watermark for maulti videos on one folders by FFMPEG like game of thrones all episode ?
i make watermark for all folders one time by useing thie code

  


  


  for %i in ("C :\Users\fady\Downloads\convert*.mp4") do ffmpeg -i "%i"
-i C :\Users\fady\Downloads\convert\fady.png -filter_complex "overlay=main_w-overlay_w-10:10" -codec:a copy
"C :\Users\fady\Downloads\convert\new% ni.mp4"

  


  


  but i want to add subtitle on the code
any one can help ?

  


  update
i try this code

  


  


  ffmpeg -i .mkv -i Cima2u.png -filter_complex "[0]subtitles=.srt[v] ;[1][v]scale2ref=w='iw*10/100':h='ow/mdar'[wm][vid] ; [vid][wm]overlay=main_w-overlay_w-5:main_h-overlay_h-5" -preset fast % ni.mp4

  


  


  but this for one file if i want to make it for folder many files can i ?

  


• how to create video file with image and audio using ffmpeg library

  12 août 2013, par BlueG

  I want to merge IMAGE + AUDIO and convert them into video using FFMPEG library. I also tried with some code snippet but it's not working properly.
  Please help.

  File mf = Environment.getExternalStorageDirectory();
  
     String livestream = mf+"/neutral.jpg";
  
     String folderpth = mf+"/navya.mp3";
  
     //String output="/home/saicomputer/game.mp4";
  
     String output = new File(Environment.getExternalStorageDirectory(),"video.mp4").getAbsolutePath();
  
     Log.i("Test", "Let's set output to " + output);
  
     String cmd="ffmpeg -i "+ livestream +" -i "+ folderpth +" -acodec copy "+ output;
  
      Log.e("chck plzzzzz", "after "+ cmd);
  
     //String jaiho="ffmpeg -i image8.jpg -i file.m4a -acodec copy test.mp4";
  
  
  
     try{
  
      //Process p =
  
       Runtime.getRuntime().exec(cmd);
  
  
  
     }
  
     catch(Exception e)
  
     {
  
         System.out.println("exception"+e);
  
     }