mpegenc: limit the maximum muxrate

It is written to the file as a 22-bit value.

CC: libav-stable@libav.org
(cherry picked from commit 75bbaf2493a71ee66eaabe3c21fadd84d07888de)
Signed-off-by: Anton Khirnov <anton@khirnov.net>

diff --git a/libavformat/mpegenc.c b/libavformat/mpegenc.c
index 1ba7647..88590b3 100644 (file)
--- a/libavformat/mpegenc.c
+++ b/libavformat/mpegenc.c
@@ -1157,7 +1157,7 @@ static int mpeg_mux_end(AVFormatContext *ctx)
 #define OFFSET(x) offsetof(MpegMuxContext, x)
 #define E AV_OPT_FLAG_ENCODING_PARAM
 static const AVOption options[] = {
-    { "muxrate", NULL,                                          OFFSET(mux_rate), AV_OPT_TYPE_INT, { .i64 =      0 }, 0, INT_MAX, E },
+    { "muxrate", NULL,                                          OFFSET(mux_rate), AV_OPT_TYPE_INT, { .i64 =      0 }, 0, (1 << 22) - 1, E },
     { "preload", "Initial demux-decode delay in microseconds.", OFFSET(preload),  AV_OPT_TYPE_INT, { .i64 = 500000 }, 0, INT_MAX, E },
     { NULL },
 };