[FFmpeg-devel] [PATCH] avutil/timecode: Fix -Wformat-truncation warning (PR #20860)

[mkver via ffmpeg-devel <ffmpeg-devel@ffmpeg.org>]

PR #20860 opened by mkver
URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/20860
Patch URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/20860.patch

Using unsigned for fps more natural since the corresponding AVTimecode field
is unsigned and fixes a -Wformat-truncation warning from GCC 16:
in case fps were negative, the hours, minutes and seconds would
be negative, leading to an additional '-' which is not accounted for in
AV_TIMECODE_STR_SIZE.

Replaces #20859.


>From 6593f517fbfc3b8fef8f61ff0af2e4baed5fafc9 Mon Sep 17 00:00:00 2001
From: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
Date: Sat, 8 Nov 2025 00:52:03 +0100
Subject: [PATCH] avutil/timecode: Fix -Wformat-truncation warning

Using unsigned for fps more natural since the corresponding AVTimecode field
is unsigned and fixes a -Wformat-truncation warning from GCC 16:
in case fps were negative, the hours, minutes and seconds would
be negative, leading to an additional '-' which is not accounted for in
AV_TIMECODE_STR_SIZE.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
---
 libavutil/timecode.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavutil/timecode.c b/libavutil/timecode.c
index bca16b6ac2..b5352a3961 100644
--- a/libavutil/timecode.c
+++ b/libavutil/timecode.c
@@ -103,7 +103,7 @@ uint32_t av_timecode_get_smpte(AVRational rate, int drop, int hh, int mm, int ss
 
 char *av_timecode_make_string(const AVTimecode *tc, char *buf, int framenum_arg)
 {
-    int fps = tc->fps;
+    unsigned fps = tc->fps;
     int drop = tc->flags & AV_TIMECODE_FLAG_DROPFRAME;
     int hh, mm, ss, ff, ff_len, neg = 0;
     int64_t framenum = framenum_arg;
-- 
2.49.1

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