diff --git a/.scripts/tc-video-generic b/.scripts/tc-video-generic
index 28c43e04..fab26d8e 100755
--- a/.scripts/tc-video-generic
+++ b/.scripts/tc-video-generic
@@ -137,13 +137,12 @@ _audiobitrate()
     ## default value.
 
     ## AWK note: in "(bitrate+0 > 500)", the +0 is required to make sure bitrate is numeric.
-    if [ -n "$(command -v mediainfo)" ]; then
-        mediainfo "$1" | awk -v codec="$AUDIO_CODEC" -v bitrate="$AUDIO_DEFAULT_RATE" 'BEGIN {id=0} /^Audio/ { getline; while(getline && ! index($0,"Bit rate  ")); if($4) printf "-c:a:" id " " codec " -b:a:" id " " $4 "k " ; else if (bitrate > 0) printf "-c:a:" id " " codec " -b:a:" id " " bitrate "k "; else printf "-c:a:" id " copy "; id++} END {print ""}'
+    if [ ! -n "$(command -v mediainfo)" ]; then
+        mediainfo "$1" | awk 'BEGIN {id=0} /^Audio/ { getline; while(getline && ! index($0,"Bit rate  ")); if($4) res=$4; else res=0; print id, res; id++}'
     else
-        ffmpeg -i "$1" 2>&1 </dev/null | awk -v codec="$AUDIO_CODEC" -v bitrate="$AUDIO_DEFAULT_RATE" 'BEGIN {id=0} /^ *Stream.*Audio/ {match($0, / [^ ]+ kb\/s/); res=substr($0, RSTART+1, RLENGTH-6); if(res || bitrate) {if(res) bitrate=res; if(bitrate+0 > 500) bitrate=500; printf "-c:a:" id " " codec " -b:a:" id " " bitrate "k "} else printf "-c:a:" id " copy "; id++} END {print ""}'
-    fi
-
-    ## TODO: use 2 awk calls.
+        ffmpeg -i "$1" 2>&1 </dev/null | awk 'BEGIN {id=0} /^ *Stream.*Audio/ {match($0, / [^ ]+ kb\/s/); res=substr($0, RSTART+1, RLENGTH-6); print id, res; id++}'
+    fi | awk -v codec="$AUDIO_CODEC" -v bitrate="$AUDIO_DEFAULT_RATE" \
+        '{if($2 || bitrate) {if($2) bitrate=$2; if(bitrate+0 > 500) bitrate=500; printf "-c:a:" $1 " " codec " -b:a:" $1 " " bitrate "k "} else printf "-c:a:" $1 " copy "} END {print ""}'
 }
 
 _tc_transcode()
@@ -172,6 +171,7 @@ _tc_transcode()
         ## the case when converting DTS to any other format because DTS has
         ## embedded channel description which is not available in these formats.
         # AUDIO_FILTER="-ac 2"
+
         AUDIO_PARAM="$(_audiobitrate "$1") -ac 2"
     fi