add ffmpeg audio

mybashrc

@@ -742,6 +742,19 @@ _MERGE_VIDEO() {
     ffmpeg -f concat -safe 0 -i mylist.txt -c copy "output-merged.mp4"
 }
 
+_TRANSFER_AUDIO() {
+    if [ "$#" -eq 0 ]; then
+        echo "Usage : ffmpeg-audio <file-with-audio> <file-without-audio>"
+    else
+        rm -f "${1%.*}.aac"
+        ffmpeg -i "$1" -vn -acodec copy "${1%.*}.aac"
+        if [ -f "${1%.*}.aac" ]; then
+            rm -f "${2%.*}-sound.mp4"
+            ffmpeg -i "$2" -i "${1%.*}.aac" -map 0:v -map 1:a -c copy -y "${2%.*}-sound.mp4"
+        fi
+    fi
+}
+
 # enable color support of ls and also add handy aliases
 # some more ls aliases
 #alias wp='/usr/bin/wp --allow-root'
@@ -769,6 +782,7 @@ alias ee-syslog='tail -n 250 /var/log/syslog | ccze -A'
 alias egrep='egrep --color=auto'
 alias ffmpeg-cut-start=ffmpeg_start_time
 alias ffmpeg-merge=_MERGE_VIDEO
+alias ffmpeg-audio=_TRANSFER_AUDIO
 alias ftpadd=_FTP_ADD
 alias fgrep='fgrep --color=auto'
 alias gg="ping google.fr"