From d381109ce8acd84fc16d3dfc4f8f688462d45366 Mon Sep 17 00:00:00 2001 From: Stefano Sabatini Date: Mon, 9 Jun 2014 19:32:37 +0200 Subject: [PATCH] lavc/h264_slice: clarify informational message in case of disabled slice multi-threaded decoding Also suggest what can be done to workaround the limitation. --- libavcodec/h264_slice.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/libavcodec/h264_slice.c b/libavcodec/h264_slice.c index a0288e0f85..e6645e8dc9 100644 --- a/libavcodec/h264_slice.c +++ b/libavcodec/h264_slice.c @@ -1884,7 +1884,10 @@ int ff_h264_decode_slice_header(H264Context *h, H264Context *h0) h0->max_contexts = 1; if (!h0->single_decode_warning) { av_log(h->avctx, AV_LOG_INFO, - "Cannot parallelize deblocking type 1, decoding such frames in sequential order\n"); + "Cannot parallelize slice decoding with deblocking filter type 1, decoding such frames in sequential order\n" + "To parallelize slice decoding you need video encoded with disable_deblocking_filter_idc set to 2 (deblock only edges that do not cross slices).\n" + "Setting the flags2 libavcodec option to +fast (-flags2 +fast) will disable deblocking across slices and enable parallel slice decoding " + "but will generate non-standard-compliant output.\n"); h0->single_decode_warning = 1; } if (h != h0) {