avformat: replace some odd 30-60 rates by higher less odd ones in get_std_framerate()

Fixes Ticket4012
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit 367c9d33)

Conflicts:

	libavformat/version.h
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavformat/avformat.h

@@ -916,7 +916,7 @@ typedef struct AVStream {
     /**
      * Stream information used internally by av_find_stream_info()
      */
-#define MAX_STD_TIMEBASES (60*12+6)
+#define MAX_STD_TIMEBASES (30*12+7+6)
     struct {
         int64_t last_dts;
         int64_t duration_gcd;

libavformat/utils.c

@@ -2743,10 +2743,16 @@ static void compute_chapters_end(AVFormatContext *s)
 
 static int get_std_framerate(int i)
 {
-    if (i < 60 * 12)
+    if (i < 30*12)
         return (i + 1) * 1001;
-    else
-        return ((const int[]) { 24, 30, 60, 12, 15, 48 })[i - 60 * 12] * 1000 * 12;
+    i -= 30*12;
+
+    if (i < 7)
+        return ((const int[]) { 40, 48, 50, 60, 80, 120, 240})[i] * 1001 * 12;
+
+    i -= 7;
+
+    return ((const int[]) { 24, 30, 60, 12, 15, 48 })[i] * 1000 * 12;
 }
 
 /* Is the time base unreliable?

tests/ref/fate/cdxl-bitline-ham6

-#tb 0: 12/601
+#tb 0: 1/50
 0,          0,          0,        1,    63180, 0xcda82c16
 0,          1,          1,        1,    63180, 0xa6097bf9
 0,          2,          2,        1,    63180, 0x4c2fb091

tests/ref/fate/cdxl-ham8

-#tb 0: 3/158
+#tb 0: 12/281
 0,          0,          0,        1,    67584, 0xce0cade5

tests/ref/fate/cdxl-pal8

-#tb 0: 12/601
+#tb 0: 1/50
 0,          0,          0,        1,    67584, 0x5eae629b
 0,          1,          1,        1,    67584, 0x32591227
 0,          2,          2,        1,    67584, 0x4e4424c7

tests/ref/fate/vcr2

-#tb 0: 16701/250000
+#tb 0: 1001/15000
 0,          0,          0,        1,    38016, 0x50e93e0d
 0,          1,          1,        1,    38016, 0x6ac8627d
 0,          2,          2,        1,    38016, 0x6f38661e