Replace ` ` syntax by $( ) in regression test shell scripts.

The latter syntax variant is more readable and easier to nest.

Originally committed as revision 20924 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 9 insertions, 9 deletions

diff --git a/tests/regression-funcs.sh b/tests/regression-funcs.sh
index 388a8fff9d..6c1191a3d8 100755
--- a/tests/regression-funcs.sh
+++ b/tests/regression-funcs.sh
@@ -33,9 +33,9 @@ pcm_ref="$datadir/$test_ref.ref.wav"
 crcfile="$datadir/$this.crc"
 target_crcfile="$target_datadir/$this.crc"
 
-if [ X"`echo | md5sum 2> /dev/null`" != X ]; then
+if [ X"$(echo | md5sum 2> /dev/null)" != X ]; then
     do_md5sum() { md5sum -b $1; }
-elif [ X"`echo | md5 2> /dev/null`" != X ]; then
+elif [ X"$(echo | md5 2> /dev/null)" != X ]; then
     do_md5sum() { md5 $1 | sed 's#MD5 (\(.*\)) = \(.*\)#\2 *\1#'; }
 elif [ -x /sbin/md5 ]; then
     do_md5sum() { /sbin/md5 -r $1 | sed 's# \**\./# *./#'; }
@@ -60,8 +60,8 @@ do_ffmpeg()
     else
         wc -c $f >> $logfile
     fi
-    expr "`cat $bench`" : '.*utime=\(.*s\)' > $bench2
-    echo `cat $bench2` $f >> $benchfile
+    expr "$(cat $bench)" : '.*utime=\(.*s\)' > $bench2
+    echo $(cat $bench2) $f >> $benchfile
 }
 
 do_ffmpeg_nomd5()
@@ -78,8 +78,8 @@ do_ffmpeg_nomd5()
     else
         wc -c $f >> $logfile
     fi
-    expr "`cat $bench`" : '.*utime=\(.*s\)' > $bench2
-    echo `cat $bench2` $f >> $benchfile
+    expr "$(cat $bench)" : '.*utime=\(.*s\)' > $bench2
+    echo $(cat $bench2) $f >> $benchfile
 }
 
 do_ffmpeg_crc()
@@ -88,7 +88,7 @@ do_ffmpeg_crc()
     shift
     echo $ffmpeg $FFMPEG_OPTS $* -f crc "$target_crcfile"
     $ffmpeg $FFMPEG_OPTS $* -f crc "$target_crcfile"
-    echo "$f `cat $crcfile`" >> $logfile
+    echo "$f $(cat $crcfile)" >> $logfile
     rm -f "$crcfile"
 }
 
@@ -98,8 +98,8 @@ do_ffmpeg_nocheck()
     shift
     echo $ffmpeg $FFMPEG_OPTS $*
     $ffmpeg $FFMPEG_OPTS -benchmark $* > $bench
-    expr "`cat $bench`" : '.*utime=\(.*s\)' > $bench2
-    echo `cat $bench2` $f >> $benchfile
+    expr "$(cat $bench)" : '.*utime=\(.*s\)' > $bench2
+    echo $(cat $bench2) $f >> $benchfile
 }
 
 do_video_decoding()