ffmpeg -i "/dev/video" -filter_complex \ "[0:v]split=2[orig][copy]; \ [copy]setpts=PTS+0.5/TB[delayed]; \... [orig][delayed]blend=all_expr='if(gt(mod(sin((X*X - Y*Y)/3000 + T*2)*cos((X+Y)/2000)\,1)\,0.5)\,A\,B)', \ hue=h='360*t/10':s=2,format=yuv420p[v]" \ -map "[v]" -map 0:a -c:v libx264 -crf 18 -preset fast -c:ashow more

ffmpeg -i /dev/video0 -filter_complex "[0:v]split[orig][copy];[copy]setpts=PTS+0.4/TB[delayed]; [orig][delayed]blend=all_expr='if(lt(mod(X*X+Y*Y\,2000)\,1000)\,A\,B)'" -f rawvideo -pix_fmt... yuv420p - | ffplay -f rawvideo -video_size 640x480 -show more

a=(x,y,k=x/12-12.5,d=abs(cos(k/2)+sin(y/2)*cos(k/5)/2+1))=>point((q=x/4+99+(d+0)*k*(.5+cos(d*2-t+y/8)))*.8*cos(c=y/69-t/8+d/6)+200,q/2*cos(c+d/3+y/69)+200) t=0,draw=$=>{t||createCanvas(w=400,w);background(0).stroke(w,46);for(t+=PI/30,i=4e4;i--;)a(i%300,i/300)}#つぶやきProcessing

a=(x,y,k=x/8-12.5,d=abs(cos(k/2)+sin(y/4)))=> point((q=x/4+90+(d+.1)*k*cos(d-t*2+y/24))*.7*cos(c=y/99-t/8+d*d/32)+200,(q+y)*.7*sin(c)+(q-y)/2*cos(c*2)+200) t=0,draw=$=>{t||createCanvas(w=400,w);background(0).stroke(w,36);for(t+=PI/60,i=4e4;i--;)a(i%200,i/300)}#つぶやきProcessing

a=(x,y,k=x/12-12.5,d=2*abs(cos(k/2)+sin(y/4)+cos(k/8)))=>point((q=x/4+90+(d)*k*cos(d-t*2+y/24))*.7*cos(c=y/79-t/8+d/8)+q/8*sin(c*4)+200,(q)*.7*sin(c)+200) t=0,draw=$=>{t||createCanvas(w=400,w);background(0).stroke(w,36);for(t+=PI/60,i=4e4;i--;)a(i%300,i/300)}//#つぶやきProcessing

t=0,draw=$=>{t||createCanvas(720,720);background(0);for(s=PI/30,j=(t+=s/4)/4%s;j<7;j+=s)for(i=0;i<TAU;i+=s*2)stroke(j*50).quad(...[[i+s,j],[i,j],[i+s,j+s],[i,j+s]].flatMap(([u,v,e=v**3*4+0])=>[e*cos(u+j)+e/v*sin(v*3-t)+360,360+e/v*cos(v*3-t)-e*sin(u+j)]))}//#つぶやきProcessing

a=(x,y,d=mag(k=(4+cos(x/9-t))*cos(x/30),e=y/7-13)+sin(y/99+t/2)-4)=>point((q=3*sin(k*2)+sin(y/29)*k*(9+2*sin(cos(e)*9-d*4+t)))+40*cos(c=d-t)+200,q*sin(c)+d*35) t=0,draw=$=>{t||createCanvas(w=400,w);background(9).stroke(w,96);for(t+=PI/120,i=1e4;i--;)a(i,i/235)}#つぶやきProcessing

a=(x,y,d=mag(k=(4+sin(x/11+t*8))*cos(x/14),e=y/8-19)+sin(y/9+t*2))=>point((q=2*sin(k*2)+sin(y/17)*k*(9+2*sin(y-d*3)))+50*cos(c=d*d/49-t)+200,q*sin(c)+d*39-440) t=0,draw=$=>{t||createCanvas(w=400,w);background(9).stroke(w,96);for(t+=PI/240,i=1e4;i--;)a(i,i/235)}#つぶやきProcessing

a=(x,y,k=x/8-12.5,d=cos(k/2)+sin(y/3)-.5)=>point((q=x/4+60+d*k*(1+cos(d*4-t*2+y/14)))*.7*cos(c=y*d/169-t/8+d/9)+200+60*sin(t*3/32+c/4),(q+59)*.7*sin(c)+200) t=0,draw=$=>{t||createCanvas(w=400,w);background(0).stroke(w,36);for(t+=PI/30,i=4e4;i--;)a(i%200,i/400)}#つぶやきProcessing

a=(x,y,o=mag(k=x/4-12.5,e=y/9+9)/9)=>point((q=x+39+y+1/k+o*k*(cos(y)/4+cos(e))*sin(o*4-t))*.7*sin(c=o+e/99-t/8+i%2*3)+200,200+y/2*cos(c*4-o)-q/2*cos(c)) t=0,draw=$=>{t||createCanvas(w=400,w);background(6).stroke(w,46);for(t+=PI/60,i=4e4;i--;)a(i/2%100,i/350)}//#つぶやきProcessing

a=(x,y,d=5*cos(o=mag(k=x/8-25,e=y/8-25)/3.5))=>[(k*atan(3*cos(d*9))+x/2)*cos(c=(d+o)/4-t/8)+200,(k*d*cos(o-d+t)+y/2)*sin(c)+200] t=0,draw=$=>{t||createCanvas(w=400,w);background(6).stroke(255,96);for(t+=PI/60,y=99;y<300;y+=2)for(x=99;++x<300;)point(...a(x,y))} #つぶやきProcessing

a=(x,y,o=mag(k=x/4-12.5,e=y/9)/9)=>point((q=x+99+cos(9/k)+o*k*(cos(e*9)/3+cos(y/9)/.7)*sin(o*4-t))*.7*sin(c=o*e/30-t/8)+200,200+y/9*cos(c*4-t/2)-q/2*cos(c)) t=0,draw=$=>{t||createCanvas(w=400,w);background(6).stroke(w,46);for(t+=PI/60,i=3e4;i--;)a(i%100,i/150)}#つぶやきProcessing

a=(x,y,d=mag(k=(5+sin(y))*cos(x*2),e=y/6-13)-3)=>point((q=3*sin(k*2)+k/19*y*(e+d/3*sin(e-d*4+t))+99)*sin(c=d-t/4+i%2*8)*cos(c/4+e/3)+200,q*d/9*cos(c/2+7)+200) t=0,draw=$=>{t||createCanvas(w=400,w);background(9).stroke(w,126);for(t+=PI/30,i=2e4;i--;)a(i,i/1e3)}#つぶやきProcessing

a=(x,y,d=mag(k=5*cos(x/14)*cos(y/30),e=y/8-13)**2/59+4)=>point((q=60-3*sin(atan2(k,e)*e)+k*(3+4/d*sin(d*d-t*2)))*sin(c=d/2+e/99-t/18)+200,(q+d*9)*cos(c)+200) t=0,draw=$=>{t||createCanvas(w=400,w);background(9).stroke(w,66);for(t+=PI/20,i=1e4;i--;)a(i%200,i/43)}#つぶやきProcessing

a=(x,y,d=mag(k=(4+sin(y*2-t)*3)*cos(x/29),e=y/8-13))=>point((q=3*sin(k*2)+.3/k+sin(y/25)*k*(9+4*sin(e*9-d*3+t*2)))+30*cos(c=d-t)+200,q*sin(c)+d*39-220) t=0,draw=$=>{t||createCanvas(w=400,w);background(9).stroke(w,96);for(t+=PI/240,i=1e4;i--;)a(i,i/235)}//#つぶやきProcessing

a=(y,d=mag(k=(y<11?6+sin(y^8)*6:y/5+cos(y/2))*cos(i-t/4),e=y/7-13)+sin(e/4+t)/2)=>point((q=y*k/d*(3+sin(d*2+y/2-t*4)))+60*cos(c=d/2+1-t/2)+200,q*sin(c)+d*29-170) t=0,draw=$=>{t||createCanvas(w=400,w);background(9).stroke(w,96);for(t+=PI/120,i=1e4;i--;)a(i/345)}#つぶやきProcessing

a=(x,y,d=mag(k=5*cos(x/19)*cos(y/30),e=y/8-12)**2/59+2)=>point((q=4*sin(atan2(k,e)*9)+9*sin(d-t)-k/d*(9+sin(d*9-t*16)*3))+50*cos(c=d*d/7-t)+200,q*sin(c)+d*45-9) t=0,draw=$=>{t||createCanvas(w=400,w);background(9).stroke(w,36);for(t+=PI/240,i=1e4;i--;)a(i,i/41)}#つぶやきProcessing

Observer vec2 p=(FC.xy*2.-r)/r.y/.2,v;for(float i,l,f;i++<1e1;o+=.03/max(l=length(v)-i,-l*3.)*(cos(t-i*.4+.1/l+vec4(0,1,2,3))+1.1))for(v=p,f=0.;f++<9.;v+=sin(ceil(v*f+i*.9)-t/2.)/f);o=max(tanh(o+(o=texture(b,(FC.xy+r.y*.05*sin(FC.xy+FC.yx/.6))/r))*o),.0);

a=(y,d=mag(k=(y<5?6+sin(y^1)*6:4+cos(y))*cos(i+t/4),e=y/3-13)+sin(e/4-t)/3)=>point((q=y*k/5*(2+sin(d*2+y-t*4)))+90*cos(c=d/3-t/2+i%2)+200,q*sin(c)+d*29-170) t=0,draw=$=>{t||createCanvas(w=400,w);background(9).stroke(w,96);for(t+=PI/90,i=1e4;i--;)a(i/790)}//#つぶやきProcessing

t=0,draw=$=>{t||createCanvas(w=400,w);background(6).stroke(255,66);for(t+=PI/60,y=99;y<300;y+=3)for(x=99;++x<300;)o=mag(k=x/8-25,e=y/8-25)/4,point((q=x+y/3+k/cos(y/8)+1/k+o*k*cos(y/8-t)*sin(o*4-t))/3*atan(2*sin(c=o*e/50-t/8))+200,(y*tan(c)+q)/3*cos(c)+200)} //#つぶやきProcessing

a=(y,d=mag(k=(4+sin(y*7-t)*3)*cos(i/78),e=y/8-13))=>point((q=2*sin(k*2)+.3/k+y/8*k*(2+sin(y-d*3+t*2)))+40*cos(c=d-t+(i&2)*2)+200,q*sin(c)+d*46-300) t=0,draw=$=>{t||createCanvas(w=400,w);background(9).stroke(w,96);for(t+=PI/120,i=2e4;i--;)a(i/470)}//#つぶやきProcessing