The following abbreviations are recognized:
@table @samp
+@item ntsc
+720x480
+@item pal
+720x576
+@item qntsc
+352x240
+@item qpal
+352x288
+@item sntsc
+640x480
+@item spal
+768x576
+@item film
+352x240
+@item ntsc-film
+352x240
@item sqcif
128x96
@item qcif
1280x720
@item hd1080
1920x1080
+@item 2k
+2048x1080
+@item 2kflat
+1998x1080
+@item 2kscope
+2048x858
+@item 4k
+4096x2160
+@item 4kflat
+3996x2160
+@item 4kscope
+4096x1716
@end table
@anchor{video rate syntax}
@item pal
25/1
@item qntsc
-30000/1
+30000/1001
@item qpal
25/1
@item sntsc
-30000/1
+30000/1001
@item spal
25/1
@item film
24/1
@item ntsc-film
-24000/1
+24000/1001
@end table
@anchor{ratio syntax}