This check was removed in commit 08aec6f6, but
s->last_picture.f->data[0] is still used in handle_p_frame_apng
unconditionally.
This fixes a segmentation fault.
Signed-off-by: Andreas Cadhalpun <andreas.cadhal...@googlemail.com>
---
libavcodec/pngdec.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libavcodec/pngdec.c b/libavcodec/pngdec.c
index 3b28b29..26de09d 100644
--- a/libavcodec/pngdec.c
+++ b/libavcodec/pngdec.c
@@ -1070,7 +1070,7 @@ exit_loop:
/* handle p-frames only if a predecessor frame is available */
ref = s->dispose_op == APNG_DISPOSE_OP_PREVIOUS ?
s->previous_picture.f : s->last_picture.f;
- if (ref->data[0]) {
+ if (ref->data[0] && s->last_picture.f->data[0]) {
if ( !(avpkt->flags & AV_PKT_FLAG_KEY) && avctx->codec_tag !=
AV_RL32("MPNG")
&& ref->width == p->width
&& ref->height== p->height
--
2.1.4
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