package config import ( "errors" "fmt" "os" "os/exec" "strings" log "github.com/sirupsen/logrus" "golang.org/x/mod/semver" ) // VerifyFFMpegPath verifies that the path exists, is a file, and is executable. func VerifyFFMpegPath(path string) error { stat, err := os.Stat(path) if os.IsNotExist(err) { return errors.New("ffmpeg path does not exist") } if err != nil { return fmt.Errorf("error while verifying the ffmpeg path: %s", err.Error()) } if stat.IsDir() { return errors.New("ffmpeg path can not be a folder") } mode := stat.Mode() // source: https://stackoverflow.com/a/60128480 if mode&0o111 == 0 { return errors.New("ffmpeg path is not executable") } cmd := exec.Command(path) out, _ := cmd.CombinedOutput() response := string(out) if response == "" { return fmt.Errorf("unable to determine the version of your ffmpeg installation at %s you may experience issues with video", path) } responseComponents := strings.Split(response, " ") if len(responseComponents) < 3 { log.Debugf("unable to determine the version of your ffmpeg installation at %s you may experience issues with video", path) return nil } fullVersionString := responseComponents[2] versionString := "v" + strings.Split(fullVersionString, "-")[0] // Some builds of ffmpeg have weird build numbers that we can't parse if !semver.IsValid(versionString) { log.Debugf("unable to determine if ffmpeg version %s is recent enough. if you experience issues with video you may want to look into updating", fullVersionString) return nil } if semver.Compare(versionString, FfmpegSuggestedVersion) == -1 { return fmt.Errorf("your %s version of ffmpeg at %s may be older than the suggested version of %s you may experience issues with video", versionString, path, FfmpegSuggestedVersion) } return nil }