On 12/4/2019 11:24 AM, Zhong Li wrote: > "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_...@126.com> > --- > libavcodec/libx265.c | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/libavcodec/libx265.c b/libavcodec/libx265.c > index 4e75077..963c28f 100644 > --- a/libavcodec/libx265.c > +++ b/libavcodec/libx265.c > @@ -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
isn't the point of preferred_transfer_characteristics to have the Arib value at the same time the standard VUI trc field contains a value like BT2020 instead, for device backwards compat purposes? If both have the Arib value, then it seems redundant. > ctx->params->vui.matrixCoeffs = avctx->colorspace; > } > > _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
