avcodec/h264_slice: set the SEI parameters early on the AVCodecContext

It's better to do it before the buffers are actually created. At least in VLC
we currently don't support changing some parameters dynamically easily so we
don't use the information if it comes after the buffer are created.

Co-authored-by: James Almer <jamrial@gmail.com>
Signed-off-by: James Almer <jamrial@gmail.com>

diff --git a/libavcodec/h264_slice.c b/libavcodec/h264_slice.c
index 1c9a270fb6cb2205f72bfb7fd6d7fee0747c2927..5ceee107a04b23ca5eb88a85506b992013f781e1 100644 (file)
--- a/libavcodec/h264_slice.c
+++ b/libavcodec/h264_slice.c
@@ -1092,6 +1092,12 @@ static int h264_init_ps(H264Context *h, const H264SliceContext *sl, int first_sl
                 h->avctx->colorspace      = sps->colorspace;
             }
         }
+
+        if (h->sei.alternative_transfer.present &&
+            av_color_transfer_name(h->sei.alternative_transfer.preferred_transfer_characteristics) &&
+            h->sei.alternative_transfer.preferred_transfer_characteristics != AVCOL_TRC_UNSPECIFIED) {
+            h->avctx->color_trc = h->sei.alternative_transfer.preferred_transfer_characteristics;
+        }
     }
 
     if (!h->context_initialized || must_reinit || needs_reinit) {
@@ -1332,12 +1338,6 @@ static int h264_export_frame_props(H264Context *h)
         h->sei.picture_timing.timecode_cnt = 0;
     }
 
-    if (h->sei.alternative_transfer.present &&
-        av_color_transfer_name(h->sei.alternative_transfer.preferred_transfer_characteristics) &&
-        h->sei.alternative_transfer.preferred_transfer_characteristics != AVCOL_TRC_UNSPECIFIED) {
-        h->avctx->color_trc = cur->f->color_trc = h->sei.alternative_transfer.preferred_transfer_characteristics;
-    }
-
     return 0;
 }