feat: initial CLI converter (v1.2)

ffprobe.go

@@ -0,0 +1,36 @@
+package main
+
+import (
+	"encoding/json"
+	"os/exec"
+)
+
+type ffprobeOutput struct {
+	Streams []struct {
+		CodecType string `json:"codec_type"`
+	} `json:"streams"`
+}
+
+func ffprobe(inputFile string) (*ffprobeOutput, error) {
+	var err error
+	var out ffprobeOutput
+
+	args := []string{
+		"-v", "quiet",
+		"-print_format", "json",
+		"-show_streams",
+		inputFile,
+	}
+	proc := exec.Command("ffprobe", args...)
+	stdout, err := proc.Output()
+	if err != nil {
+		return nil, err
+	}
+	// fmt.Println("read", string(stdout))
+
+	err = json.Unmarshal(stdout, &out)
+	if err != nil {
+		return nil, err
+	}
+	return &out, nil
+}