codec-regression: force vsync 0 on the me_threshold test to make sure frames match.

tests/codec-regression.sh

@@ -58,7 +58,7 @@ do_video_decoding
 
 # mpeg2 encoding interlaced
 file=${outfile}mpeg2reuse.mpg
-do_avconv $file $DEC_OPTS -me_threshold 256 -i ${target_path}/${outfile}mpeg2thread.mpg $ENC_OPTS -same_quant -me_threshold 256 -mb_threshold 1024 -vcodec mpeg2video -f mpeg1video -bf 2 -flags +ildct+ilme -threads 4
+do_avconv $file $DEC_OPTS -me_threshold 256 -i ${target_path}/${outfile}mpeg2thread.mpg $ENC_OPTS -same_quant -me_threshold 256 -mb_threshold 1024 -vcodec mpeg2video -vsync 0 -f mpeg1video -bf 2 -flags +ildct+ilme -threads 4
 do_video_decoding
 fi