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• FFmpeg - add an animated gif (cropped by mask) to the video

  11 mars 2021, par zeromodule

  I have 3 inputs :

  


  

  1. Video file : https://file.io/6jtUlnZ7TGmT

  


  2. Animated GIF with transparent background https://i.imgur.com/Vo3KHZm.gif

  


  3. Mask file (BW) the same resolution as the video https://i.imgur.com/YJXUUrZ.png

  


  


  I want to put the image on the video, but throw out all GIF pixels that are transparent in the mask (replace them with transparent ones).

  


  
  

  

  


  


  My current command, without masking (it works fine) :

  


  ffmpeg -i input.mp4 -ignore_loop 0 -i animation.gif \
-filter_complex "[1]scale=700x700[scaled_gif];\
[0][scaled_gif]overlay=50:30:shortest=1" \
-codec:a copy output.mp4


  


  UPDATE #1

  


  I managed to get closer to my goal with this command :

  


  ffmpeg -y -i input.mp4 -loop 1 -i mask.png \ 
-filter_complex "[1:v]alphaextract[mask]; \
movie=animation.gif,scale=1920x1080[scaled_gif]; \
[scaled_gif][mask]alphamerge[masked]; \
[0:v][masked]overlay=0:0" \
-c:a copy output_masked.mp4


  


  but it has 2 problems :

  


  

  1. GIF loses it's transparency. Transparent pixels become white.

  


  2. GIF plays only once (i.e. no loop)

  


  


  Output : https://file.re/2021/03/11/outputmasked/

  


• FFmpeg - add an image (cropped by mask) to the video

  10 mars 2021, par zeromodule

  I have 3 inputs :

  


  

  1. Video file

  


  2. Image file (GIF)

  


  3. Mask file (transparent PNG with some black pixels) - the same resolution as the video

  


  


  I want to put the image on the video, but throw out all image pixels that are transparent in the mask (replace them with transparent ones).

  


  
  

  

  


  


  My current command, without masking (it works fine) :

  


  ffmpeg -i input.mp4 -ignore_loop 0 -i image.gif -filter_complex "[1]scale=700x700[scaled_gif];[0][scaled_gif]overlay=50:30:shortest=1" -codec:a copy output.mp4


  


  I know I should probably use alphamerge, but I don't understand how to use it properly.

  


• 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