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• Removing hidden characters from text file with tr while keeping latin-2

  16 mai 2020, par philk

  I have some text files with hidden characters and I'm able to remove them with this command :

  



  tr -cd '\11\12\15\40-\176' < initial_file > final_file


  



  This command would be perfect if I could keep latin-2 characters. I can't find info about 6 digit octal in tr man page. How can add characters with octal value like \305\237 or \303\256 to that tr command ?

  



  I need to keep this list :

  



  \304\202 Ă
\304\203 ă
\303\216 Î
\303\256 î
\303\202 Â
\303\242 â
\305\236 Ş
\305\237 ş
\305\242 Ţ
\305\243 ţ


  



  My system locale is en_US.UTF-8.
I have subtitles from several translators and I burn them onto video with a ffmpeg script. All went fine until some of the translators delivered subtitles with a little problem : in VLC I don's see it but after I burn with ffmpeg, an unwanted character is in front of every line. I can't copy that character and remove it with sed since is burned in the output video. If I run cat -v on that subtitle I see M-bM-^@M-^N in front of every line.

  


• avformat/matroskadec : Allow multiple Tags elements

  1er mai 2020, par Andreas Rheinhardt

  avformat/matroskadec : Allow multiple Tags elements
  The Matroska specification allows multiple (level 1) Tags elements per
  
  file, yet our demuxer didn't : While it parsed any amount of Tags
  
  elements it found in front of the Clusters (albeit with warnings because
  
  of duplicate elements), it would treat any Tags element only referenced
  
  via a SeekHead entry as already parsed if any Tags element has already
  
  been parsed ; therefore this Tags element would not be parsed at all.
  Signed-off-by : Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
  

  • [DH] libavformat/matroskadec.c

• FFMpeg - Static Blurred Background Image

  21 avril 2020, par John Doe

  I have an ffmpeg command which takes a concat list of images and creates a slideshow, each image slowly zooming out for 10 seconds, then slaps a transparent overlay image ontop and adds music.

  



  This works fine, but I am currently stretching the input images to fit the 1920x1080 resolution. Would it be possible to create a static blurred+stretched background of the image whilst the original image is infront with the zoom effect intact ?

  



  Here's the code :

  



  ffmpeg -y -hide_banner -safe 0 -f concat -i "concat.txt" -i "overlay.png" -i "music.mp3" -filter_complex "[0]scale=3840x2160,zoompan=z='if(lte(zoom,1.0),1.25,max(1.001,zoom-0.0012))':x='iw/2-(iw/zoom/2)':y='ih/2-(ih/zoom/2)':fps=20:d=200:s=1920x1080[p];[p][1]overlay, drawtext=fontfile=Heathergreen.otf:text=TEXT:fontcolor=black:fontsize=62:x=135:y=940, drawtext=fontfile=voxbox.ttf:text='TEXT':fontcolor=white:fontsize=70:x=120:y=885[outv]" -map "[outv]" -map 2:a -pix_fmt yuv420p -c:v libx264 -x264-params keyint=80:scenecut=0 -c:a aac -aspect 16:9 -preset veryfast -shortest -movflags faststart -fflags genpts -r 20 "output.mp4"


  



  Here's the effect I need, but with the front image zooming out, as in the code above.


  



  I've had success using -filter_complex "[0]scale=-1:1080[in];[0]scale=1920:1080,boxblur=10:10,setsar=1[bg];[bg][in]overlay=(W-w)/2:(H-h)/2" for similar jobs but I can't seem to integrate it with this code. I'd really appreciate some help here.

  



  Thanks.