av_hwdevice_ctx_create_derived_opts 718 libavutil/hwcontext.c return av_hwdevice_ctx_create_derived_opts(dst_ref_ptr, type, src_ref, av_hwdevice_ctx_create_derived_opts 347 libavutil/hwcontext.h int av_hwdevice_ctx_create_derived_opts(AVBufferRef **dst_ctx,