Make ffmpeg path configurable, also finds it automatically in current folder. Fixes #1932

conf/configuration.go

@@ -47,7 +47,7 @@ type configOptions struct {
 	IgnoredArticles              string
 	IndexGroups                  string
 	SubsonicArtistParticipations bool
-	ProbeCommand                 string
+	FFmpegPath                   string
 	CoverArtPriority             string
 	CoverJpegQuality             int
 	EnableGravatar               bool
@@ -246,7 +246,7 @@ func init() {
 	viper.SetDefault("ignoredarticles", "The El La Los Las Le Les Os As O A")
 	viper.SetDefault("indexgroups", "A B C D E F G H I J K L M N O P Q R S T U V W X-Z(XYZ) [Unknown]([)")
 	viper.SetDefault("subsonicartistparticipations", false)
-	viper.SetDefault("probecommand", "ffmpeg %s -f ffmetadata")
+	viper.SetDefault("ffmpegpath", "")
 	viper.SetDefault("coverartpriority", "cover.*, folder.*, front.*, embedded, external")
 	viper.SetDefault("coverjpegquality", 75)
 	viper.SetDefault("enablegravatar", false)