Encode MPEG-4 with mp3 audio (using lame library) instead of AAC: Arguably all free AAC encoders are worse than Lame.

1 files changed, 9 insertions, 1 deletions

diff --git a/localvideowebencode b/localvideowebencode
index 168026d..552213f 100755
--- a/localvideowebencode
+++ b/localvideowebencode
@@ -197,6 +197,10 @@ if [ -n "$use_avconv_vp8$use_avconv_vp9$use_vpxenc" ]; then
 	[ -z "$use_oggenc$use_opusenc" ] || use_wav=yes
 	[ -z "$use_avconv_ogg$use_avconv_opus" ] || use_matroska=yes
 fi
+# Avoid AAC if possible: Lame arguably better than any free AAC encoder
+# Argument for AAC: Safari possibly lacks mp3 support in video container
+#use_aac=yes
+[ -n "$use_aac" ] || use_mp3=yes
 
 # resolve quality/speed hints
 multipass=yes
@@ -363,6 +367,7 @@ fi
 # default per-codec-channel bitrates
 quality_vorbis=3
 bitrate_opus=48
+bitrate_mp3=64
 bitrate_aac=64
 
 case "$audio" in
@@ -373,12 +378,14 @@ case "$audio" in
 	stereo=yes
 	quality_vorbis=1
 	bitrate_opus=32
+	bitrate_mp3=48
 	opusapp=voip
 	;;
     speech)
 	mono=yes
 	quality_vorbis=1
 	bitrate_opus=32
+	bitrate_mp3=48
 	compress=yes
 	[ -z "$melt_recent" ] || _melt_loudness="$loudness_data"
 	limit=yes
@@ -466,6 +473,7 @@ _oggenc_vorbis="$_oggenc_downmix -q $quality_vorbis"
 _melt_opus="$_melt_downmix acodec=libopus ab=$((channels*bitrate_opus))k${opusapp:+ application=$opusapp}"
 _avconv_opus="$_avconv_downmix -c:a libopus -b:a $((channels*bitrate_opus))k${opusapp:+ -application $opusapp}"
 _opusenc_opus="$_opusenc_downmix --bitrate $((channels*bitrate_opus))"
+_melt_mp3="$_melt_downmix acodec=libmp3lame ab=$((channels*bitrate_mp3))k"
 _melt_aac="$_melt_downmix acodec=aac ab=$((channels*bitrate_aac))k"
 
 # container options
@@ -491,7 +499,7 @@ _avconv_webm_keepvideo_opus="-f webm $_avconv_video -c:v copy ${silence:+-an}${c
 _melt_webm_vp9="f=webm $_melt_video $_melt_vp9 ${silence:+an=1 audio_off=1}${channels:+$_melt_opus}"
 _avconv_webm_vp9="-f webm $_avconv_video $_avconv_vp9 ${silence:+-an}${channels:+$_avconv_opus}"
 _avconv_webm_onlyvideo_vp9="-f webm $_avconv_video $_avconv_vp9 -an}"
-_melt_mp4="f=mp4 $_melt_video $_melt_h264 ${silence:+an=1 audio_off=1}${channels:+$_melt_aac}"
+_melt_mp4="f=mp4 $_melt_video $_melt_h264 ${silence:+an=1 audio_off=1}${channels:+${use_mp3:+$_melt_mp3}${use_aac:+$_melt_aac}}"
 _melt_img="f=image2 $_melt_video"
 
 if [ -n "$loudness" ] && [ -z "$silence$_melt_loudness" ]; then