go - Running FFMPEG command through Golang exec -

i need run ffmpeg command create video images crossfade between images transition. command derived post. need run through golang os/exec package. command need run is:

ffmpeg -loop 1 -t 5 -i img-0.png -loop 1 -t 5 -i img-1.png -loop 1 -t 5 -i img-2.png -filter_complex "[1:v][0:v]blend=all_expr='a*(if(gte(t,0.5),1,t/0.5))+b*(1-(if(gte(t,0.5),1,t/0.5)))'[b1v];[2:v][1:v]blend=all_expr='a*(if(gte(t,0.5),1,t/0.5))+b*(1-(if(gte(t,0.5),1,t/0.5)))'[b2v];[0:v][b1v][1:v][b2v][2:v]concat=n=5:v=1:a=0,format=yuv420p[v]" -map '[v]' -c:v libx264 -pix_fmt yuv420p -r 30 -s 1280x720 -aspect 16:9 -crf 1 -preset ultrafast output.mp4 

if run command directly in terminal, works fine. however, not work through code. code takes string command , runs through os/exec package:

command := "ffmpeg -loop 1 -t 5 -i img-0.png -loop 1 -t 5 -i img-1.png -loop 1 -t 5 -i img-2.png -filter_complex "[1:v][0:v]blend=all_expr='a*(if(gte(t,0.5),1,t/0.5))+b*(1-(if(gte(t,0.5),1,t/0.5)))'[b1v];[2:v][1:v]blend=all_expr='a*(if(gte(t,0.5),1,t/0.5))+b*(1-(if(gte(t,0.5),1,t/0.5)))'[b2v];[0:v][b1v][1:v][b2v][2:v]concat=n=5:v=1:a=0,format=yuv420p[v]" -map '[v]' -c:v libx264 -pix_fmt yuv420p -r 30 -s 1280x720 -aspect 16:9 -crf 1 -preset ultrafast output.mp4"  lastquote := rune(0) f := func(c rune) bool {     switch {     case c == lastquote:         lastquote = rune(0)         return false     case lastquote != rune(0):         return false     case unicode.in(c, unicode.quotation_mark):         lastquote = c         return false     default:         return unicode.isspace(c)     } } parts := strings.fieldsfunc(command, f)  cmd := exec.command(parts[0], parts[1:]...) cmd.stderr = os.stderr cmd.stdout = os.stdout  err := cmd.run() if err != nil {     return err } 

when run this, ffmpeg error: no such filter: '"', error configuring filters. know has quotes have in video filters, have tried work , can't figure out.

any appreciated!

this work correctly :

exec.command("ffmpeg", "-loop", "1", "-t", "5", "-i", "img-0.png", "-loop",  "1", "-t", "5", "-i", "img-1.png", "-loop", "1", "-t", "5", "-i", "img-2.png", "-filter_complex", "[1:v][0:v]blend=all_expr='a*(if(gte(t,0.5),1,t/0.5))+b*(1-(if(gte(t,0.5),1,t/0.5)))'[b1v];[2:v][1:v]blend=all_expr='a*(if(gte(t,0.5),1,t/0.5))+b*(1-(if(gte(t,0.5),1,t/0.5)))'[b2v];[0:v][b1v][1:v][b2v][2:v]concat=n=5:v=1:a=0,format=yuv420p[v]", "-map", "[v]", "-c:v", "libx264", "-pix_fmt", "yuv420p", "-r", "30", "-s", "1280x720", "-aspect", "16:9", "-crf", "1", "-preset", "ultrafast", "output.mp4") 

notice did remove start , end double quotes -filter_complex parameters , 2 single quotes -map parameters.

did hand, though, not sure of strings function automagically.