It may be empty if the previous thread's decode call did not contain a
valid frame.
---
libavcodec/h264_slice.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/libavcodec/h264_slice.c b/libavcodec/h264_slice.c
index 47276dd..bedfab4 100644
--- a/libavcodec/h264_slice.c
+++ b/libavcodec/h264_slice.c
@@ -553,8 +553,11 @@ int ff_h264_update_thread_context(AVCodecContext *dst,
h->cur_pic_ptr = REBASE_PICTURE(h1->cur_pic_ptr, h, h1);
ff_h264_unref_picture(h, &h->cur_pic);
- if ((ret = ff_h264_ref_picture(h, &h->cur_pic, &h1->cur_pic)) < 0)
- return ret;
+ if (h1->cur_pic.f.buf[0]) {
+ ret = ff_h264_ref_picture(h, &h->cur_pic, &h1->cur_pic);
+ if (ret < 0)
+ return ret;
+ }
h->workaround_bugs = h1->workaround_bugs;
h->low_delay = h1->low_delay;
--
2.0.0
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