parseutil: Add more resolution aliases

Add DCI 2k and 4k and uhd1 and uhd2.

doc/avconv.texi

@@ -493,6 +493,14 @@ abbreviations are recognized:
 1280x720
 @item hd1080
 1920x1080
+@item 2kdci
+2048x1080
+@item 4kdci
+4096x2160
+@item uhd1
+3840x2160
+@item uhd2
+7680x4320
 @end table
 
 @item -aspect[:@var{stream_specifier}] @var{aspect} (@emph{output,per-stream})

libavutil/parseutils.c

@@ -80,6 +80,10 @@ static const VideoSizeAbbr video_size_abbrs[] = {
     { "hd480",     852, 480 },
     { "hd720",    1280, 720 },
     { "hd1080",   1920,1080 },
+    { "2kdci",    2048,1080 },
+    { "4kdci",    4096,2160 },
+    { "uhd1",     3840,2160 },
+    { "uhd2",     7680,4320 },
 };
 
 static const VideoRateAbbr video_rate_abbrs[]= {