PR #21291 opened by Jamaika1
URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/21291
Patch URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/21291.patch
```
matroskaenc1.c:3349:79: warning: '%012.9f' directive output may be truncated
writing between 12 and 320 bytes into a region of size between 8 and 14
[-Wformat-truncation=]
3349 | snprintf(duration_string, sizeof(duration_string),
"%02d:%02d:%012.9f",
|
^~~~~~~
matroskaenc1.c:3349:17: note: 'snprintf' output between 19 and 333 bytes into a
destination of size 20
3349 | snprintf(duration_string, sizeof(duration_string),
"%02d:%02d:%012.9f",
|
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
3350 | (int) duration_sec / 3600, ((int) duration_sec
/ 60) % 60,
|
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
3351 | fmod(duration_sec, 60));
| ~~~~~~~~~~~~~~~~~~~~~~~
```
>From cafb3e18801a1847326f4cb2ef85ff2105b10dc5 Mon Sep 17 00:00:00 2001
From: Jamaika1 <[email protected]>
Date: Wed, 24 Dec 2025 12:18:06 +0000
Subject: [PATCH] Fix: output size between 19 and 333 bytes into a destination
of size 20
```
matroskaenc1.c:3349:79: warning: '%012.9f' directive output may be truncated
writing between 12 and 320 bytes into a region of size between 8 and 14
[-Wformat-truncation=]
3349 | snprintf(duration_string, sizeof(duration_string),
"%02d:%02d:%012.9f",
|
^~~~~~~
matroskaenc1.c:3349:17: note: 'snprintf' output between 19 and 333 bytes into a
destination of size 20
3349 | snprintf(duration_string, sizeof(duration_string),
"%02d:%02d:%012.9f",
|
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
3350 | (int) duration_sec / 3600, ((int) duration_sec
/ 60) % 60,
|
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
3351 | fmod(duration_sec, 60));
| ~~~~~~~~~~~~~~~~~~~~~~~
```
---
libavformat/matroskaenc.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/libavformat/matroskaenc.c b/libavformat/matroskaenc.c
index 18f17f4329..053efead7e 100644
--- a/libavformat/matroskaenc.c
+++ b/libavformat/matroskaenc.c
@@ -3332,7 +3332,11 @@ after_cues:
if (track->duration_offset > 0) {
double duration_sec = track->duration * av_q2d(st->time_base);
+#ifdef __MINGW32__
+ char duration_string[333] = "";
+#else
char duration_string[DURATION_STRING_LENGTH + 1] = "";
+#endif
ebml_master simpletag;
av_log(s, AV_LOG_DEBUG, "stream %d end duration = %" PRIu64
"\n", i,
--
2.49.1
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