From 8fccd6d510fe802c7d2dbe291676b0780cd4cf7f Mon Sep 17 00:00:00 2001 From: Marton Balint Date: Fri, 26 Jan 2024 01:42:13 +0100 Subject: [PATCH] avutil/rational: increase av_d2q precision Fixes parsing small timebases from expressions (where the expression API converts the result to double), like in this command line: ffprobe -f lavfi -i testsrc=d=1,settb=1/2000000000 -show_streams -show_entries stream=time_base Before the patch timebase was parsed as 1/1999999999. Signed-off-by: Marton Balint --- libavutil/rational.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavutil/rational.c b/libavutil/rational.c index eb148ddb12..329fbf3302 100644 --- a/libavutil/rational.c +++ b/libavutil/rational.c @@ -114,7 +114,7 @@ AVRational av_d2q(double d, int max) return (AVRational) { d < 0 ? -1 : 1, 0 }; frexp(d, &exponent); exponent = FFMAX(exponent-1, 0); - den = 1LL << (61 - exponent); + den = 1LL << (62 - exponent); // (int64_t)rint() and llrint() do not work with gcc on ia64 and sparc64, // see Ticket2713 for affected gcc/glibc versions av_reduce(&a.num, &a.den, floor(d * den + 0.5), den, max);