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video-to-image.go
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video-to-image.go
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package main
import (
"flag"
"fmt"
"os"
"os/exec"
"strconv"
)
func main() {
flag.BoolVar(&f.all, "a", false, "output all frames")
flag.StringVar(&f.duration, "d", "", "duration")
flag.Int64Var(&f.ext, "e", 0, exts.String())
flag.StringVar(&f.name, "i", "", "input file")
flag.StringVar(&f.start, "s", "", "start")
flag.Parse()
arg := []string{"-hide_banner"}
if f.start != "" {
arg = append(arg, "-ss", f.start)
}
if f.name != "" {
arg = append(arg, "-i", f.name)
if f.duration != "" {
arg = append(arg, "-t", f.duration)
}
arg = append(arg, "-q", "1", "-vsync", "vfr")
if !f.all {
arg = append(arg, "-vf", "select='eq(pict_type, I)'")
}
arg = append(arg, "%d" + exts[f.ext])
cmd := exec.Command("ffmpeg", arg...)
cmd.Stderr = os.Stderr
fmt.Println("Run", cmd)
err := cmd.Run()
if err != nil {
panic(err)
}
} else {
flag.Usage()
}
}
var f struct {
all bool
duration string
name string
start string
ext int64
}
type extensions map[int64]string
var exts = extensions{
0: ".jpg",
1: ".png",
}
func (e extensions) String() string {
var b []byte
b = append(b, "extension"...)
for k, v := range e {
b = append(b, '\n')
b = strconv.AppendInt(b, k, 10)
b = append(b, ' ')
b = append(b, v...)
}
return string(b)
}