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lavc/x265: set preferred_transfer_characteristics for HLG 

"HEVC HDR UHDTV Bitstreams using HLG10 shall also contain the
alternative_transfer_characteristics SEI message. The
alternative_transfer_characteristics SEI message shall be inserted on
the HEVC DVB_RAP, and preferred_transfer_characteristics shall be set
equal to "18", indicating Recommendation ITU-R BT. 2100 [45] HLG
system."

Signed-off-by: Zhong Li <zhongli_dev@126.com>
This commit is contained in:
Zhong Li 2019-12-04 14:24:09 +00:00
parent 8446318502
commit a87b5d5e8c
1 changed files with 4 additions and 0 deletions
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4
libavcodec/libx265.c
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@ -159,6 +159,10 @@ static av_cold int libx265_encode_init(AVCodecContext *avctx)
// x265 validates the parameters internally
ctx->params->vui.colorPrimaries = avctx->color_primaries;
ctx->params->vui.transferCharacteristics = avctx->color_trc;
#if X265_BUILD >= 159
if (avctx->color_trc == AVCOL_TRC_ARIB_STD_B67)
ctx->params->preferredTransferCharacteristics = ctx->params->vui.transferCharacteristics;
#endif
ctx->params->vui.matrixCoeffs = avctx->colorspace;
}