[FFmpeg-devel] [PATCH] avfilter/f_metadata: use AVBPrint API to remove buf size limitation

lance.lmwang at gmail.com lance.lmwang at gmail.com
Mon Jun 8 17:01:11 EEST 2020


From: Limin Wang <lance.lmwang at gmail.com>

Signed-off-by: Limin Wang <lance.lmwang at gmail.com>
---
 libavfilter/f_metadata.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/libavfilter/f_metadata.c b/libavfilter/f_metadata.c
index 598257b15b..808782d31a 100644
--- a/libavfilter/f_metadata.c
+++ b/libavfilter/f_metadata.c
@@ -31,6 +31,7 @@
 #include "libavutil/internal.h"
 #include "libavutil/opt.h"
 #include "libavutil/timestamp.h"
+#include "libavutil/bprint.h"
 #include "libavformat/avio.h"
 #include "avfilter.h"
 #include "audio.h"
@@ -195,9 +196,11 @@ static void print_file(AVFilterContext *ctx, const char *msg, ...)
 
     va_start(argument_list, msg);
     if (msg) {
-        char buf[128];
-        vsnprintf(buf, sizeof(buf), msg, argument_list);
-        avio_write(s->avio_context, buf, av_strnlen(buf, sizeof(buf)));
+        AVBPrint buf;
+        av_bprint_init(&buf, 0, AV_BPRINT_SIZE_UNLIMITED);
+        av_vbprintf(&buf, msg, argument_list);
+        avio_write(s->avio_context, buf.str, buf.len);
+        av_bprint_finalize(&buf, NULL);
     }
     va_end(argument_list);
 }
-- 
2.21.0



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