diff --git a/tests/ffmpeg.regression.ref b/tests/ffmpeg.regression.ref
index ccc3c268cb..43f0c39ef3 100644
--- a/tests/ffmpeg.regression.ref
+++ b/tests/ffmpeg.regression.ref
@@ -11,7 +11,7 @@ e608f387c4ee7227fb4d0042e528ded7 *./data/a-msmpeg4v2.avi
 7261e23fd8ad1de6efee022051b936be *./data/out.yuv
 04a77cf9d7a3b4dcb394440d0bb67ea7 *./data/a-h263.avi
 545df74e0aa443499600faedd10a7065 *./data/out.yuv
-cf9264fe9011bb9475025d6f1d4f4d22 *./data/a-h263p.avi
+0d949fbabab1d67e76829e95b031a28f *./data/a-h263p.avi
 668ba3cb87859ca4d9a4269bad47b3f5 *./data/out.yuv
 fbda0de97cb28e359ca8b47aacba7d84 *./data/a-odivx.avi
 98bb113f0fa0d61fd3b0b1699ac6c69a *./data/out.yuv
@@ -19,9 +19,9 @@ fbda0de97cb28e359ca8b47aacba7d84 *./data/a-odivx.avi
 799d3db687f6cdd7a837ec156efc171f *./data/out.yuv
 78f8b142f5841d0bda2faa0467633154 *./data/a-mpeg4-rc.avi
 580000bfe2d4359d9aa9a9415f953b3b *./data/out.yuv
-f3bcac88b3c5fa546af7077099ac679f *./data/a-mpeg4-adv.avi
-4c5e8754506ff2c53649541e4fcd2438 *./data/out.yuv
-3c65a1bc6866649e666286c825bd5b96 *./data/a-mpeg1b.mpg
+12cd2282b00644e35999f19969ec9bd9 *./data/a-mpeg4-adv.avi
+b54262af56f6681186fa2c44e4ef6ec7 *./data/out.yuv
+a38cb11e3035a280f3dad3ccdff5997b *./data/a-mpeg1b.mpg
 da8e21c7b78b7a25558dc319524b91d8 *./data/out.yuv
 2ecdef2ebfcc94e8ce90ce88c90ae8f4 *./data/a-mjpeg.avi
 f23a9e50a559e174766ee808c48fea22 *./data/out.yuv
diff --git a/tests/regression.sh b/tests/regression.sh
index 682bfbab14..26adea26e7 100755
--- a/tests/regression.sh
+++ b/tests/regression.sh
@@ -145,7 +145,7 @@ fi
 if [ -n "$do_h263p" ] ; then
 # h263p encoding
 file=${outfile}h263p.avi
-do_ffmpeg $file -y -qscale 10 -umv -f pgmyuv -i $raw_src -s 352x288 -an -vcodec h263p -ps 1000 $file
+do_ffmpeg $file -y -qscale 10 -umv -f pgmyuv -i $raw_src -s 352x288 -an -vcodec h263p -ps 300 $file
 
 # h263p decoding
 do_ffmpeg $raw_dst -y -i $file -f rawvideo $raw_dst 
@@ -185,7 +185,7 @@ fi
 if [ -n "$do_mpeg4adv" ] ; then
 # mpeg4
 file=${outfile}mpeg4-adv.avi
-do_ffmpeg $file -y -qscale 9 -4mv -hq -part -ps 1000 -f pgmyuv -i $raw_src -an -vcodec mpeg4 $file
+do_ffmpeg $file -y -qscale 9 -4mv -hq -part -ps 200 -f pgmyuv -i $raw_src -an -vcodec mpeg4 $file
 
 # mpeg4 decoding
 do_ffmpeg $raw_dst -y -i $file -f rawvideo $raw_dst 
@@ -195,7 +195,7 @@ fi
 if [ -n "$do_mpeg1b" ] ; then
 # mpeg1
 file=${outfile}mpeg1b.mpg
-do_ffmpeg $file -y -qscale 8 -bf 3 -f pgmyuv -i $raw_src -an -vcodec mpeg1video $file
+do_ffmpeg $file -y -qscale 8 -bf 3 -ps 200 -f pgmyuv -i $raw_src -an -vcodec mpeg1video $file
 
 # mpeg1 decoding
 do_ffmpeg $raw_dst -y -i $file -f rawvideo $raw_dst