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• FFmpeg Question : Proper Format to use when no transition is being used ?

  23 juin 2021, par HHH-Messenger

  I can NOT fine any examples so can someone point me in the right direction please.
I have many images with to short duration time to add transitions, and would like to know what the proper syntax and format is, for a text file ?
Would only the images with transitions be indexed, or all of them ?

  


  Also if my files are located in the directory C :\temp\ what does the text file look like below ?

  


  $ ffmpeg \
  
-loop 1 -t 1.4 -i 001.jpg \ (no fade in or out)
  
-loop 1 -t 1.65 -i 002.jpg \ (no fade in or out)
  
-loop 1 -t 1.9 -i 003.jpg \ (no fade in or out)
  
-loop 1 -t 2.6 -i 004.jpg \ (with fade out .500)
  
-loop 1 -t 2.35 -i 005.jpg \ (with fade in .500)
  
-loop 1 -t 1.4 -i 006.jpg \ (no fade in or out)
  
-filter_complex \
  
"[0:v]fade=t=out:st=0:d=0[v0] ; \
  
[1:v]fade=t=in:st=0:d=0,fade=t=out:st=0:d=0[v1] ; \
  
[2:v]fade=t=in:st=0:d=0,fade=t=out:st=0:d=0[v2] ; \
  
[3:v]fade=t=in:st=0:d=0,fade=t=out:st=2.5:d=.5[v3] ; \
  
[4:v]fade=t=in:st=1.85:d=.5,fade=t=out:st=0:d=0[v4] ; \
  
[5:v]fade=t=in:st=0:d=0,fade=t=out:st=0:d=0[v5] ; \
  
[v0][v1][v2][v3][v4][v5]concat=n=6:v=1:a=0,format=yuv420p[v]" -map "[v]" -map 6:a -shortest output7.mp4
  

  


  Here is a common example : ALL IMAGES HAVE EFFECTS ADDED, PLEASE GIVE AN EXAMPLE WITH SOME HAVING EFFECTS AND SOME NOT HAVING EFFECTS ADDED.

  


  ffmpeg \
  
-t 5 -i 1.jpg
  
-t 5 -i 2.jpg
  
-t 5 -i 3.jpg
  
-filter_complex
  
"[0:v]zoompan=z='if(lte(zoom,1.0),1.5,max(1.001,zoom-.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-.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-.0015))':d=125,fade=t=in:st=0:d=1,fade=t=out:st=4:d=1[v2] ;
  
[v0][v1][v2][concat=n=4:v=1:a=0,format=yuv420p[v]" -map "[v]" -s "800x450" -t 40 ./out_fade.mp4

  


• How can I tell subprocess to answer "y" to a commandline question ?

  13 mai 2022, par Faindirnomainzein

  I'm automating an ffmpeg command but when the file exists already, it asks me if I have to "Overwrite [y/N]" and it stalls the entire script until I have to enter "y" myself in the console. How can I automate that ?

  


  for file in all_files_in_dir:
    output = file.split('.')[0]
    subprocess.call(f'ffmpeg -hide_banner -i {file} -map 0:s:1 {output}.srt')


  


  I have to enter "y" myself (as seen in green), then press enter everytime a file is already found. The answer will be "y", so I can hardcode the answer "y" if need be.

  


  

  


• Big question of Target size, or video bitrate must be specified when using two-pass

  14 juillet 2022, par Rojojun

  I tried to solve the error which is Target size, or video bitrate must be specified when using two-pass.

  


  But I couldn't find how to solve it and how to find path of video exactly I attached my code below this post

  


  Please give me some tips of solving the problem !

  


  @Service
public class ThumbnailService {

    public HashMap exportThumbnail(File file) throws Exception {
        // file is from controller and form-data
        //String inputPath = "Users/hojunna/Download/my/";
        //String outputPath = "/usr/local/video/thumbnail/";

        String ffmpegBasePath = "/opt/homebrew/bin/";
        FFmpeg ffmpeg = new FFmpeg(ffmpegBasePath+"ffmpeg");        
        FFprobe ffprobe = new FFprobe(ffmpegBasePath+"ffprobe");    
        
        FFmpegBuilder builder = new FFmpegBuilder()
                .setInput("/Users/hojunna/Desktop/" + file)                         
                //.overrideOutputFiles(true)                    
                //.addExtraArgs("-ss", "00:00:01")          
                .addOutput("/Users/hojunna/Desktop/test.jpg")       
                .setFrames(1)
                .setVideoFilter("select='gte(n\\,10)',scale=200:-1")
                .done();

        FFmpegExecutor executor = new FFmpegExecutor(ffmpeg, ffprobe);      
        executor.createJob(builder).run();                                  
        executor.createTwoPassJob(builder).run();                           

        HashMap resultMap = new HashMap();
        return resultMap;
    }
}