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@@ -6,10 +6,21 @@ secfad=5
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temp1=/tmp/$(cat /dev/urandom | tr -dc 'a-zA-Z0-9' | fold -w 32 | head -n 1).m4a
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temp2=/tmp/$(cat /dev/urandom | tr -dc 'a-zA-Z0-9' | fold -w 32 | head -n 1).m4a
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+#step 1 rimuove il silenzio
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ffmpeg -i "$1" -to $(($secmax + 15)) -af "silenceremove=start_periods=1:start_duration=1:start_threshold=-60dB:detection=peak,aformat=dblp,areverse,silenceremove=start_periods=1:start_duration=1:start_threshold=-60dB:detection=peak,aformat=dblp,areverse" -y $temp1
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-ffmpeg -i $temp1 -to $secmax -af "afade=t=out:st=$(($secmax - $secfad)):d=$secfad" -y $temp2
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-mv $temp2 "$2"
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-rm $temp1
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+# step 2 tronca e sfuma
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+len=$(ffprobe -show_entries stream=duration -of default=noprint_wrappers=1:nokey=1 -v quiet $temp1)
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+len=${len%.*}
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+
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+if [ $len -gt $secmax ];
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+then
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+ ffmpeg -i $temp1 -to $secmax -af "afade=t=out:st=$(($secmax - $secfad)):d=$secfad" -y $temp2
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+ mv $temp2 "$2"
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+ rm $temp1
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+else
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+ mv $temp1 "$2"
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+fi
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+
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