refactor ffmpeg, download styling

ffmpeg/ffmpeg.go

@@ -0,0 +1,36 @@
+package ffmpeg
+
+import (
+	"bytes"
+	"fmt"
+	"os/exec"
+	"strings"
+)
+
+func Clip(src, dst string, from, to float64) error {
+	_, _, err := Ffmpeg("-i", src,
+		"-ss", fmt.Sprintf("%f", from),
+		"-to", fmt.Sprintf("%f", to),
+		"-c", "copy",
+		dst)
+	return err
+}
+
+// runs ffprobe with the provided args and returns (stdout, stderr, error)
+func Ffmpeg(args ...string) ([]byte, []byte, error) {
+	ffmpeg := "ffmpeg"
+	log.Infoln(ffmpeg, strings.Join(args, " "))
+	cmd := exec.Command(ffmpeg, args...)
+	var stdout bytes.Buffer
+	var stderr bytes.Buffer
+	cmd.Stdout = &stdout
+	cmd.Stderr = &stderr
+	err := cmd.Run()
+
+	if err != nil {
+		log.Errorf("ffmpeg error: %v", err)
+	}
+	log.Infoln("stdout:", stdout.String())
+	log.Infoln("stderr:", stderr.String())
+	return stdout.Bytes(), stderr.Bytes(), err
+}