The current code does not handle correctly the situation when
sps->num_reoder_frames
was set using the level. The incorrect has_b_frames results in the wrong DTS
guess and
malformed output (wrong 'Non-monotonous DTS' fixup).
sps->num_reorder_frames is set in the function
ff_h264_decode_seq_parameter_set(),
see comment: 'if the maximum delay is not stored in the SPS, derive it based on
the
level'.
Issue: #6810
---
libavcodec/h264_slice.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/libavcodec/h264_slice.c b/libavcodec/h264_slice.c
index 35dcabd611..04b10656e0 100644
--- a/libavcodec/h264_slice.c
+++ b/libavcodec/h264_slice.c
@@ -1287,6 +1287,7 @@ static int h264_select_output_frame(H264Context *h)
h->mmco_reset = 0;
if (sps->bitstream_restriction_flag ||
+ sps->ref_frame_count ||
h->avctx->strict_std_compliance >= FF_COMPLIANCE_STRICT) {
h->avctx->has_b_frames = FFMAX(h->avctx->has_b_frames,
sps->num_reorder_frames);
}
--
2.13.6
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