[FFmpeg-cvslog] avformat/mov: Use int64_t in intermediate for corrected_dts

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michael at niedermayer.cc> | Mon Jun  3 03:20:41 2024 +0200| [034054b3706bea8524cf8846813e17636ca5ab33] | committer: Michael Niedermayer

avformat/mov: Use int64_t in intermediate for corrected_dts

Fixes: CID1500312 Unintentional integer overflow

Sponsored-by: Sovereign Tech Fund
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=034054b3706bea8524cf8846813e17636ca5ab33
---

 libavformat/mov.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavformat/mov.c b/libavformat/mov.c
index 61071faf4d..9016cd5ad0 100644
--- a/libavformat/mov.c
+++ b/libavformat/mov.c
@@ -3386,7 +3386,7 @@ static int mov_read_stts(MOVContext *c, AVIOContext *pb, MOVAtom atom)
             sc->stts_data[i].duration = 1;
             corrected_dts += (delta_magnitude < 0 ? (int64_t)delta_magnitude : 1) * sample_count;
         } else {
-            corrected_dts += sample_duration * sample_count;
+            corrected_dts += sample_duration * (int64_t)sample_count;
         }
 
         current_dts += sc->stts_data[i].duration * (int64_t)sample_count;