diff --git a/libavcodec/options.c b/libavcodec/options.c
index 545887a7c1..a876ce0404 100644
--- a/libavcodec/options.c
+++ b/libavcodec/options.c
@@ -69,7 +69,7 @@ static const AVOption *opt_find(void *obj, const char *name, const char *unit, i
 
 static const AVOption options[]={
 {"b", "set bitrate (in bits/s)", OFFSET(bit_rate), FF_OPT_TYPE_INT, {.dbl = AV_CODEC_DEFAULT_BITRATE }, INT_MIN, INT_MAX, V|E},
-{"ab", "set bitrate (in bits/s)", OFFSET(bit_rate), FF_OPT_TYPE_INT, {.dbl = 64*1000 }, INT_MIN, INT_MAX, A|E},
+{"ab", "set bitrate (in bits/s)", OFFSET(bit_rate), FF_OPT_TYPE_INT, {.dbl = AV_CODEC_DEFAULT_BITRATE }, INT_MIN, INT_MAX, A|E},
 {"bt", "set video bitrate tolerance (in bits/s)", OFFSET(bit_rate_tolerance), FF_OPT_TYPE_INT, {.dbl = AV_CODEC_DEFAULT_BITRATE*20 }, 1, INT_MAX, V|E},
 {"flags", NULL, OFFSET(flags), FF_OPT_TYPE_FLAGS, {.dbl = DEFAULT }, 0, UINT_MAX, V|A|E|D, "flags"},
 {"mv4", "use four motion vector by macroblock (mpeg4)", 0, FF_OPT_TYPE_CONST, {.dbl = CODEC_FLAG_4MV }, INT_MIN, INT_MAX, V|E, "flags"},
diff --git a/tests/lavf-regression.sh b/tests/lavf-regression.sh
index d7e684032c..6d2d6d8162 100755
--- a/tests/lavf-regression.sh
+++ b/tests/lavf-regression.sh
@@ -14,7 +14,7 @@ eval do_$test=y
 do_lavf()
 {
     file=${outfile}lavf.$1
-    do_ffmpeg $file $DEC_OPTS -f image2 -vcodec pgmyuv -i $raw_src $DEC_OPTS -ar 44100 -f s16le -i $pcm_src $ENC_OPTS -t 1 -qscale 10 $2
+    do_ffmpeg $file $DEC_OPTS -f image2 -vcodec pgmyuv -i $raw_src $DEC_OPTS -ar 44100 -f s16le -i $pcm_src $ENC_OPTS -ab 64k -t 1 -qscale 10 $2
     do_ffmpeg_crc $file $DEC_OPTS -i $target_path/$file $3
 }
 
@@ -53,7 +53,7 @@ fi
 
 if [ -n "$do_rm" ] ; then
 file=${outfile}lavf.rm
-do_ffmpeg $file $DEC_OPTS -f image2 -vcodec pgmyuv -i $raw_src $DEC_OPTS -ar 44100 -f s16le -i $pcm_src $ENC_OPTS -t 1 -qscale 10 -acodec ac3_fixed
+do_ffmpeg $file $DEC_OPTS -f image2 -vcodec pgmyuv -i $raw_src $DEC_OPTS -ar 44100 -f s16le -i $pcm_src $ENC_OPTS -t 1 -qscale 10 -acodec ac3_fixed -ab 64k
 # broken
 #do_ffmpeg_crc $file -i $target_path/$file
 fi