diff options
| author | Michael Niedermayer <michael@niedermayer.cc> | 2017-06-24 14:45:35 +0300 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2017-06-25 03:48:02 +0300 |
| commit | 7ee48d9de118a26e51ef1e2b8b570022ace46145 (patch) | |
| tree | ceb8d9c6ea9c394ba4c1608432446be6516b093f /libavcodec/mpeg4videodec.c | |
| parent | fe74c2364ee3ac0478abf5c579d3ac27e02fc30c (diff) | |
avcodec/mpeg4videodec: Fix GMC with videos of dimension 1
Fixes: runtime error: shift exponent -1 is negative
Fixes: 2338/clusterfuzz-testcase-minimized-5153426541379584
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 4976a3411f71518d17a57e373b62517f066648fd)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Diffstat (limited to 'libavcodec/mpeg4videodec.c')
| -rw-r--r-- | libavcodec/mpeg4videodec.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/libavcodec/mpeg4videodec.c b/libavcodec/mpeg4videodec.c index 9e85dfac74..060bed5817 100644 --- a/libavcodec/mpeg4videodec.c +++ b/libavcodec/mpeg4videodec.c @@ -170,7 +170,7 @@ static int mpeg4_decode_sprite_trajectory(Mpeg4DecContext *ctx, GetBitContext *g int a = 2 << s->sprite_warping_accuracy; int rho = 3 - s->sprite_warping_accuracy; int r = 16 / a; - int alpha = 0; + int alpha = 1; int beta = 0; int w = s->width; int h = s->height; |