[FFmpeg-devel] [PATCH] fftools/ffprobe: Avoid overflow when calculating DAR
Derek Buitenhuis
derek.buitenhuis at gmail.com
Fri May 3 19:36:23 EEST 2024
Both the codecpar's width and height, and the SAR num and den are
ints, which can overflow. Cast to int64_t, which is what av_reduce
takes.
Without this, occasionally, display_aspect_ratio can be negative in
ffprobe's -show_stream output.
Signed-off-by: Derek Buitenhuis <derek.buitenhuis at gmail.com>
---
fftools/ffprobe.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/fftools/ffprobe.c b/fftools/ffprobe.c
index 0d4cd0b048..5b40dad527 100644
--- a/fftools/ffprobe.c
+++ b/fftools/ffprobe.c
@@ -3324,8 +3324,8 @@ static int show_stream(WriterContext *w, AVFormatContext *fmt_ctx, int stream_id
if (sar.num) {
print_q("sample_aspect_ratio", sar, ':');
av_reduce(&dar.num, &dar.den,
- par->width * sar.num,
- par->height * sar.den,
+ (int64_t) par->width * sar.num,
+ (int64_t) par->height * sar.den,
1024*1024);
print_q("display_aspect_ratio", dar, ':');
} else {
--
2.43.0
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