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• Get blur effect inside a drawn box using ass format

  18 septembre 2024, par Armen Sanoyan

  I have Nodejs application which generates subtitles file for video editing. The editing is done by ffmpeg. For each word I also generate a backdrop with rounded corners using drawing command. Example of dialog for backdrop.

  


  Dialogue: 0,00:00:38.60,00:00:42.10,Default,,0,0,0,,{\p1\1a&HD8&\c&HE27FA4&\pos(341.07421875,517.5)\an4}  {\p1}m 15 0 b 1202.8515625 .... {\p0}


  


  Now I want to make the backdrop blur.
(Text backdrop by ass formatting)

  


  I have tried to use \blur or \be, but they are for other purpose. Below is reference from the doc

  


  Enable or disable a subtle softening-effect for the edges of the text

  


  Is there any other way to achieve the blurred backdrop. I am ready even to mix ffmpeg commands like boxblur and ass file. I mean separately paint the backdrops and then apply ass subtitles file. Here is an experiment to explain the idea.

  


  [0:v]split=3[base][blur1_in][blur2_in];

[blur1_in]crop=w=100:h=100:x=20:y=40[region1];
[region1]boxblur=luma_radius=10:luma_power=1[blurred_region1];
[base][blurred_region1]overlay=x=20:y=40:enable='between(t,0,5)'[tmp1];

[blur2_in]crop=w=30:h=30:x=20:y=40[region2];
[region2]boxblur=luma_radius=5:luma_power=1[blurred_region2];
[tmp1][blurred_region2]overlay=x=20:y=40:enable='between(t,5,10)'[tmp2];

[tmp2]ass=../logs/ass.ass:fontsdir=../fonts/Audiowide-Regular.ttf[final_video]


  


  The problem in this case is that the corners are not rounded. Could anyone explain to me what is the easiest way to get backdrop with rounded corners an blurred inside

  


• PS4 can not play h264 vedio

  21 octobre 2019, par Alex Chiang

  Summary

  PS4 Media player can not play h264 mkv, avi or mp4 movies which were converted from HEVC. According the sony’s [docs], the media player could be.

  source
  video : HEVC
  audio : AC-3

  converted
  video : H264
  audio : AC-3

• ffmpeg - overlay multiple fading texts with different colors

  18 novembre 2017, par Abc123

  I have problem with this ffmpeg command, it works fine if the fading text is in white font color, but if I change the fontcolor to something else (for example black), the fading text will not appear, any ideas ?

  ffmpeg -i ./based_video/480/clip3.mp4 -filter_complex "color=black:100x100[c]; [c][0]scale2ref[ct][mv0]; \
  
  [ct]setsar=1,split=3[t1][t2][t3]; \
  
  [t1]drawtext=fontfile=/usr/share/fonts/truetype/roboto/Roboto-Bold.ttf:text='\$30,000.0':fontsize=40:fontcolor=white,split[text1][alpha1]; \
  
  [text1][alpha1]alphamerge,fade=t=in:st=1:d=1:alpha=1,fade=t=out:st=5:d=1:alpha=1[txta1]; \
  
  [t2]drawtext=fontfile=/usr/share/fonts/truetype/roboto/Roboto-Bold.ttf:text='\$30,000.0':fontsize=40:fontcolor=white,split[text2][alpha2]; \
  
  [text2][alpha2]alphamerge,fade=t=in:st=1:d=1:alpha=1,fade=t=out:st=5:d=1:alpha=1[txta2]; \
  
  [t3]drawtext=fontfile=/usr/share/fonts/truetype/roboto/Roboto-Bold.ttf:text='\$30,000.0':fontsize=40:fontcolor=white,split[text3][alpha3]; \
  
  [text3][alpha3]alphamerge,fade=t=in:st=1:d=1:alpha=1,fade=t=out:st=5:d=1:alpha=1[txta3]; \
  
  [mv0][txta1]overlay=x='100':y='200':shortest=1[mv1]; \
  
  [mv1][txta2]overlay=x='300':y='200':shortest=1[mv2]; \
  
  [mv2][txta3]overlay=x='500':y='200':shortest=1" \
  
  -c:v libx264 -c:a copy ./output_video/testnew-clip3-output.mp4

  full log is here :
  https://docs.google.com/document/d/1y9Dnn0Df75J8P_hZ6LjHTX2dk-8z97UnTjlX8dnc0v0/edit?usp=sharing

  Thanks in advance