av_hwframe_ctx_create_derived  114 libavfilter/vf_hwmap.c             err = av_hwframe_ctx_create_derived(&ctx->hwframes_ref,
av_hwframe_ctx_create_derived  157 libavfilter/vf_hwmap.c             err = av_hwframe_ctx_create_derived(&source,
av_hwframe_ctx_create_derived  599 libavutil/hwcontext.h int av_hwframe_ctx_create_derived(AVBufferRef **derived_frame_ctx,