lavc: propagate hwaccel errors

At least the new videotoolbox decoder does not actually set a frame if
end_frame fails. This causes the API to return success and signals that
a picture was decoded, even though AVFrame->data[0] is NULL.

Fix this by propagating end_frame errors.

1 files changed, 2 insertions, 1 deletions

diff --git a/libavcodec/h264_picture.c b/libavcodec/h264_picture.c
index 81d90d73c2..04bbf028cc 100644
--- a/libavcodec/h264_picture.c
+++ b/libavcodec/h264_picture.c
@@ -172,7 +172,8 @@ int ff_h264_field_end(H264Context *h, H264SliceContext *sl, int in_setup)
     }
 
     if (avctx->hwaccel) {
-        if (avctx->hwaccel->end_frame(avctx) < 0)
+        err = avctx->hwaccel->end_frame(avctx);
+        if (err < 0)
             av_log(avctx, AV_LOG_ERROR,
                    "hardware accelerator failed to decode picture\n");
     }