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• avcodec/dvbsubdec : Clear w/h/size on region buffer allocation failure

  14 mai 2015, par Michael Niedermayer

  avcodec/dvbsubdec : Clear w/h/size on region buffer allocation failure
  Signed-off-by : Michael Niedermayer <michaelni@gmx.at>
  

  • [DH] libavcodec/dvbsubdec.c

• avfilter/vf_zscale : active region use doubles so use that type here too

  13 mai 2022, par Paul B Mahol

  avfilter/vf_zscale : active region use doubles so use that type here too
  

  • [DH] libavfilter/vf_zscale.c

• 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