if [ "$vcodec" = mpeg4 ]; then
vopts="-g 300 -bf 2"
-fi
-if [ "$vcodec" = mpeg4-hq ]; then
+elif [ "$vcodec" = mpeg4-hq ]; then
vcodec=mpeg4
vopts="-g 300 -bf 2 -mbd rd -flags +mv4+aic -trellis 2 -cmp 2 -subcmp 2"
-fi
-if [ "$vcodec" = mpeg4-vhq ]; then
+elif [ "$vcodec" = mpeg4-vhq ]; then
vcodec=mpeg4
vopts="-g 200 -bf 2 -mbd rd -flags +mv4+aic+qprd+mv0 -flags2 skiprd -trellis 2 -cmp 2 -subcmp 2"
-fi
-if [ "$vcodec" = x264 ]; then
+elif [ "$vcodec" = x264 ]; then
vcodec=libx264
-fi
-if [ "$vcodec" = x264-hq ]; then
+elif [ "$vcodec" = x264-hq ]; then
vcodec=libx264
vopts="-preset slow"
-fi
-if [ "$vcodec" = x264-vhq ]; then
+elif [ "$vcodec" = x264-vhq ]; then
vcodec=libx264
vopts="-preset veryslow"
+
+else
+ echo "Unknown video codec $vcodec; known codecs are {mpeg4,x264}[-[v]hq], copy" >&2
+ exit 1
fi
if [ "$pass" -eq 1 ]; then