music-library/ffmpeg.go

package main

import (
	"context"
	"fmt"
	"os/exec"
)

func GetStreamsFromFile(path string) (string, error) {
	cmd := exec.Command(
		"ffprobe",
		"-loglevel", "error",
		"-show_entries", "stream=codec_type",
		"-of", "csv=p=0",
		path,
	)

	data, err := cmd.CombinedOutput()
	return string(data), err
}

func ConvertToAudio(ctx context.Context, videoFile, targetPath string) error {
	cmd := exec.CommandContext(
		ctx, "ffmpeg",
		"-i", videoFile,
		"-y",           // overwrite existing file
		"-vn",          // no video
		"-ar", "44100", // sample rate
		"-ac", "2", // audio channels
		"-ab", "192k", // dont know dont care
		"-f", "mp3", // output format
		targetPath,
	)

	data, err := cmd.CombinedOutput()
	if err != nil {
		return fmt.Errorf("error during process execution: %w\nOutput:\n%s", err, string(data))
	}

	return nil
}