command wrapper

making transcoder

transcoder/command.go

@@ -0,0 +1,29 @@
+package transcoder
+
+import (
+	"fmt"
+	"log"
+	"os/exec"
+)
+
+type Worker struct {
+	Command string
+	Args    string
+	Output  chan string
+}
+
+func (cmd *Worker) Run() {
+	out, err := exec.Command(cmd.Command, cmd.Args).Output()
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	cmd.Output <- string(out)
+}
+
+func Collect(c chan string) {
+	for {
+		msg := <-c
+		fmt.Printf("The command result is %s\n", msg)
+	}
+}

transcoder/transcoder.go

@@ -6,6 +6,10 @@ import (
 	"errors"
 	"os"
 	"goffmpeg/models"
+    "os/exec"
+	"fmt"
+	"goffmpeg/ffmpeg"
+	"bytes"
 )
 
 type Transcoder struct {
@@ -15,14 +19,45 @@ type Transcoder struct {
 	MediaFile			  *models.Mediafile
 }
 
-func New(inputPath *string) (*Transcoder, error) {
+func New(inputPath *string, configuration *ffmpeg.Configuration) (*Transcoder, error) {
     transcoding := new(Transcoder)
 
 	if inputPath == nil {
     	return nil, errors.New("error: transcoder.Initialize -> inputPath missing")
 	}
 
+	_, err := os.Stat(*inputPath)
+	if os.IsNotExist(err) {
+		return nil, errors.New("error: transcoder.Initialize -> input file not found")
+	}
+
+	// Set input path
     transcoding.InputPath = *inputPath
+
+    // TODO: Get file metadata from ffprobe and set MediaFile
+	command := fmt.Sprintf("%s -i %s -print_format json -show_format -show_streams -show_error", configuration.FfprobeBin, *inputPath)
+
+	cmd := exec.Command("/bin/sh", "-c", command)
+
+	var out bytes.Buffer
+
+	cmd.Stdout = &out
+
+	cmdErr := cmd.Start()
+
+	if cmdErr != nil {
+		return nil, cmdErr
+	}
+
+	_, errProc := cmd.Process.Wait()
+	if errProc != nil {
+		return nil, errProc
+	}
+
+	stdout := out.String()
+
+	fmt.Println(stdout)
+
     transcoding.MediaFile = new(models.Mediafile)
 
     return transcoding, nil