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• How to make a Magick.NET watermark ? [closed]

  26 janvier 2021, par sibbasa

  Has anyone worked with Magick.NET ? Do I need to transfer this code to C# Magick.NET ? I can't find examples and documentation of Magick.NET. :( Can someone help me ?

  


      logo=../../logo/Moto_Gymkhana_transparent.png
    Frames=15
    width=842
    height=595
    mkdir tmp
    for (( n=0; n<=90; n+=$(expr $(( 90/$Frames )))))
    do
    oWidth=$(printf %.$2f $(echo "$width*(c($n*4*a(1)/180))+1" | bc -l))
    shadowShift=$(printf %.$2f $(echo "15*(s($n*4*a(1)/180))+1" | bc -l))
    convert -size 850x600 xc:transparent -background none \( -alpha set -channel A -evaluate add -50% $logo -geometry $oWidth\ x$height\! \) -gravity center -composite -depth 8 ./tmp/$n.png
    convert tmp/$n.png \( +clone -background '#cccf' -shadow 100x8+$shadowShift-3 \) -background none  -compose Dst_Over -layers merge -gravity center -depth 8 tmp/logo$(expr $(( 1000+n ))).png
    convert tmp/$n.png \( +clone -background '#cccf' -shadow 100x8-$shadowShift-3 \) -background none -compose Src_Over -layers merge -gravity center -flop tmp/logo$(expr $(( 1800-n ))).png
    convert tmp/$n.png \( +clone -background '#cccf' -shadow 100x8+$shadowShift-3 \) -background none  -compose Src_Over -layers merge -gravity center -flop tmp/logo$(expr $(( 2000+n ))).png
    convert tmp/$n.png \( +clone -background '#cccf' -shadow 100x8-$shadowShift-3 \) -background none -compose Dst_Over -layers merge -gravity center tmp/logo$(expr $(( 2800-n ))).png
    done
    ffmpeg -pattern_type glob -i 'tmp/logo*.png' -pix_fmt argb -vcodec qtrle -r 30 rotatingLogo.mov
    ffmpeg -loop 1 -pattern_type glob -i 'tmp/logo1000.png' -pix_fmt argb -vcodec qtrle -r 30 -t 3 stillLogo.mov
    rm list.txt
    for (( i=0; i<20; i+=1 ))
    do
    echo file 'stillLogo.mov' >> list.txt
    echo file 'rotatingLogo.mov' >> list.txt
    done
    ffmpeg -f concat -i list.txt -c copy logoWithRotation.mov


  


• Aligning multiple words vertically with drawtext & ffmpeg

  26 mai 2023, par CRAIG

  I am needing to vertically align several drawtext chained commands that are of various font sizes off of a center point, but in a way where similar fonts/sizes will appear to be correctly aligned off of their baselines.

  


  The $centerline is a vertical top positioned line that theoretically is the vertical center that each text would sit upon regardless of total text height/font size so even differing fonts of differing sizes will look good together.

  


  But the max_glyph_a is to ensure that the same fonts with the same font size will sit on the same baseline. I would think this would do it, but no, it's off vertically.

  


   $y = '(' . $centerline . '+(text_h/2)-max_glyph_a)';


  


  I can't wrap my noggin around this. Any ideas ?

  


• How to add a watermark using FFmpeg ? [duplicate]

  19 février 2018, par eRROR.AuX

  This question already has an answer here :

  • How to add transparent watermark in center of a video with ffmpeg ?
    
    1 answer
    

  How to add watermark to this code :

   $shel = shell_exec(“$ffmpeg_b -y -i $video_file_full_path -vcodec
  
    libx264 -preset {$pt->config->convert_speed} -s 640×360 -crf 24
  
    $video_output_full_path_360 2>&1”);