[egs] Fixed some bugs in mgb_data_prep.sh of mgb2_arabic (#3501)

egs/mgb2_arabic/s5/local/mgb_data_prep.sh

@@ -2,8 +2,9 @@
 
 # Copyright (C) 2016, Qatar Computing Research Institute, HBKU
 #               2016-2019  Vimal Manohar
+#               2019 Dongji Gao
 
-if [ $# -ne 3 ]; then
+if [ $# -ne 2 ]; then
   echo "Usage: $0 <DB-dir> <mer-sel>"
   exit 1;
 fi
@@ -18,7 +19,7 @@ for x in $train_dir $dev_dir; do
   mkdir -p $x
   if [ -f ${x}/wav.scp ]; then
     mkdir -p ${x}/.backup
-    mv $x/{wav.scp,feats.scp,utt2spk,spk2utt,segments,text} ${train_dir}/.backup
+    mv $x/{wav.scp,feats.scp,utt2spk,spk2utt,segments,text} ${x}/.backup
   fi
 done
 
@@ -44,7 +45,10 @@ cat $train_dir/wav_list | while read basename; do
     echo $basename $wavDir/$basename.wav >> $train_dir/wav.scp
 done 
 
-cp $db_dir/dev/{text,segments} $dev_dir
+for x in text segments; do
+  cp $db_dir/dev/${x}.all $dev_dir/${x}
+done
+
 find $db_dir/dev/wav -type f -name "*.wav" | \
   awk -F/ '{print $NF}' | perl -pe 's/\.wav//g' > \
   $dev_dir/wav_list
@@ -56,11 +60,17 @@ done
 #Creating a file reco2file_and_channel which is used by convert_ctm.pl in local/score.sh script
 awk '{print $1" "$1" 1"}' $dev_dir/wav.scp > $dev_dir/reco2file_and_channel
 
+# Creating utt2spk for dev from segments
+if [ ! -f $dev_dir/utt2spk ]; then
+  cut -d ' ' -f1 $dev_dir/segments > $dev_dir/utt_id
+  cut -d '_' -f1-2 $dev_dir/utt_id | paste -d ' ' $dev_dir/utt_id - > $dev_dir/utt2spk
+fi
+
 for list in overlap non_overlap; do
   rm -rf ${dev_dir}_$list || true
   cp -r $dev_dir ${dev_dir}_$list
   for x in segments text utt2spk; do
-    utils/filter_scp.pl $db_dir/dev/${list}_speech.lst $dev_dir/$x > ${dev_dir}_$list/$x
+    utils/filter_scp.pl $db_dir/dev/${list}_speech $dev_dir/$x > ${dev_dir}_$list/${x}
   done
 done