[FFmpeg-cvslog] movenc: check that fps for tmcd is within encodable range.

[Michael Niedermayer]

ffmpeg | branch: release/1.1 | Michael Niedermayer <michaelni at gmx.at> | Thu Jan 17 18:52:35 2013 +0100| [bfd586577cbe22f863d5620fa2a85f5f5bb3c9e1] | committer: Michael Niedermayer

movenc: check that fps for tmcd is within encodable range.

The fps is stored as a 8 bit value thus 255 is the maximum encodable.

Signed-off-by: Michael Niedermayer <michaelni at gmx.at>
(cherry picked from commit 55d66b27902d3f566cd6cf6f08d4233dcdc338f5)

Signed-off-by: Michael Niedermayer <michaelni at gmx.at>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=bfd586577cbe22f863d5620fa2a85f5f5bb3c9e1
---

 libavformat/movenc.c |    5 +++++
 1 file changed, 5 insertions(+)

diff --git a/libavformat/movenc.c b/libavformat/movenc.c
index d9b002e..1b851c0 100644
--- a/libavformat/movenc.c
+++ b/libavformat/movenc.c
@@ -1149,6 +1149,11 @@ static int mov_write_tmcd_tag(AVIOContext *pb, MOVTrack *track)
     int frame_duration = av_rescale(track->timescale, track->enc->time_base.num, track->enc->time_base.den);
     int nb_frames = 1.0/av_q2d(track->enc->time_base) + 0.5;
 
+    if (nb_frames > 255) {
+        av_log(NULL, AV_LOG_ERROR, "fps %d is too large\n", nb_frames);
+        return AVERROR(EINVAL);
+    }
+
     avio_wb32(pb, 0); /* size */
     ffio_wfourcc(pb, "tmcd");               /* Data format */
     avio_wb32(pb, 0);                       /* Reserved */