Addresses the issue reported in ticket #4609.
Signed-off-by: Andreas Rheinhardt <andreas.rheinha...@outlook.com>
---
libavformat/webpenc.c | 13 +++++++------
1 file changed, 7 insertions(+), 6 deletions(-)
diff --git a/libavformat/webpenc.c b/libavformat/webpenc.c
index b3f5bdc9b5..fb0cca3922 100644
--- a/libavformat/webpenc.c
+++ b/libavformat/webpenc.c
@@ -177,8 +177,8 @@ static int webp_write_trailer(AVFormatContext *s)
if (w->using_webp_anim_encoder) {
if (w->loop) { // Write loop count.
- avio_seek(s->pb, 42, SEEK_SET);
- avio_wl16(s->pb, w->loop);
+ if (avio_seek(s->pb, 42, SEEK_SET) == 42)
+ avio_wl16(s->pb, w->loop);
}
} else {
int ret;
@@ -186,10 +186,11 @@ static int webp_write_trailer(AVFormatContext *s)
return ret;
filesize = avio_tell(s->pb);
- avio_seek(s->pb, 4, SEEK_SET);
- avio_wl32(s->pb, filesize - 8);
- // Note: without the following, avio only writes 8 bytes to the file.
- avio_seek(s->pb, filesize, SEEK_SET);
+ if (avio_seek(s->pb, 4, SEEK_SET) == 4) {
+ avio_wl32(s->pb, filesize - 8);
+ // Note: without the following, avio only writes 8 bytes to the
file.
+ avio_seek(s->pb, filesize, SEEK_SET);
+ }
}
return 0;
--
2.34.1
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