Init

util/av/merge_audio.go

@@ -0,0 +1,46 @@
+package av
+
+import (
+	"fmt"
+	"os"
+
+	ffmpeg "github.com/u2takey/ffmpeg-go"
+)
+
+func MergeVideoWithAudio(
+	videoFile string,
+	audioFile string,
+) error {
+	tempFileName := videoFile + ".temp"
+	outputFile := videoFile
+
+	err := os.Rename(videoFile, tempFileName)
+	if err != nil {
+		return fmt.Errorf("failed to rename file: %w", err)
+	}
+
+	defer os.Remove(tempFileName)
+	defer os.Remove(audioFile)
+
+	videoStream := ffmpeg.Input(tempFileName)
+	audioStream := ffmpeg.Input(audioFile)
+
+	err = ffmpeg.Output(
+		[]*ffmpeg.Stream{videoStream, audioStream},
+		outputFile,
+		ffmpeg.KwArgs{
+			"map":      []string{"0:v:0", "1:a:0"},
+			"movflags": "+faststart",
+			"c:v":      "copy",
+			"c:a":      "copy",
+		}).
+		Silent(true).
+		OverWriteOutput().
+		Run()
+
+	if err != nil {
+		return fmt.Errorf("failed to merge files: %w", err)
+	}
+
+	return nil
+}