diff --git a/over-video.py b/over-video.py
index 3cb1e7e..7078629 100755
--- a/over-video.py
+++ b/over-video.py
@@ -22,9 +22,10 @@ X264_BANNED_PIXFMTS = {"bgr24", "yuv422p"}
 # see doc/command_assembler.png
 command = over.types.ndict()
 command.identify = Command("ffprobe", "-v", "quiet", "-print_format", "json", "-show_format", "-show_streams", "INFILE")
-command.normalize_prepass = Command("ffmpeg", "-i", "INFILE", "-max_muxing_queue_size", "512", "-filter:a", "loudnorm=I=-16:TP=-1.5:LRA=11:print_format=json", "-f", "null", "/dev/null")
-command.encode_generic = Command("ffmpeg", "FPS", "CUT_FROM", "-i", "INFILE", "-max_muxing_queue_size", "512", "-threads", str(multiprocessing.cpu_count()), "CUT_TO", "MAP", "VIDEO", "AUDIO", "-sn", "OUTFILE")
-command.sub_opus = Command("-codec:a", "libopus", "NORMALIZE")
+command.normalize_prepass = Command("ffmpeg", "-i", "INFILE", "-filter:a", "loudnorm=I=-16:TP=-1.5:LRA=11:print_format=json", "-f", "null", "/dev/null")
+command.encode_generic = Command("ffmpeg", "FPS", "CUT_FROM", "-i", "INFILE", "-threads", str(multiprocessing.cpu_count()), "CUT_TO", "MAP", "VIDEO", "AUDIO", "-sn", "OUTFILE")
+command.sub_mp3 = Command("-codec:a", "libmp3lame", "NORMALIZE")
+command.sub_opus = Command("-codec:a", "libopus", "NORMALIZE", "-filter:a", "channelmap=channel_layout=5.1")
 command.sub_vorbis = Command("-codec:a", "libvorbis", "-qscale:a", "QUALITY", "NORMALIZE")
 command.sub_pcm = Command("-codec:a", "pcm_s16le", "NORMALIZE")
 command.sub_x264 = Command("PIXFMT", "-codec:v", "libx264", "-preset", "PRESET", "-crf", "QUALITY", "-profile:v", "high", "-level", "4.2", "VFILTER")
@@ -111,7 +112,7 @@ if __name__ == "__main__":
 	if main.cfg.move_source:
 		main.print("move source files to <W>%s<.>/" %(main.cfg.move_source))
 	
-	if main.cfg.audio not in ("drop", "copy", "pcm", "vorbis", "opus"):
+	if main.cfg.audio not in ("drop", "copy", "pcm", "vorbis", "opus", "mp3"):
 		raise ValueError("unknown audio codec: %s" %(main.cfg.audio))
 	
 	if main.cfg.video not in ("drop", "copy", "x264", "x265", "vp9"):
@@ -311,6 +312,11 @@ if __name__ == "__main__":
 			command.sub_opus.NORMALIZE = info.normalize_command
 			
 			encode_cmd.AUDIO = command.sub_opus
+		elif main.cfg.audio == "mp3":
+			command.sub_mp3.reset()
+			command.sub_mp3.NORMALIZE = info.normalize_command
+			
+			encode_cmd.AUDIO = command.sub_mp3
 		
 		if main.cfg.ffmpeg_vfilter:
 			info.vfilter_command = command.sub_vfilter
diff --git a/version.py b/version.py
index b8ca209..e1dd9c8 100644
--- a/version.py
+++ b/version.py
@@ -2,7 +2,7 @@
 # encoding: utf-8
 
 major = 1 # VERSION_MAJOR_IDENTIFIER
-minor = 110 # VERSION_MINOR_IDENTIFIER
-# VERSION_LAST_MM 1.110
-patch = 1 # VERSION_PATCH_IDENTIFIER
+minor = 111 # VERSION_MINOR_IDENTIFIER
+# VERSION_LAST_MM 1.111
+patch = 0 # VERSION_PATCH_IDENTIFIER
 str = ".".join(str(v) for v in (major, minor, patch))