On Sat, Oct 19, 2019 at 22:33:55 -0700, Jun Li wrote: > + ret = ff_replaygain_export(st, s->internal->id3v2_meta); In libavformat/Makefile, CONFIG_W64_DEMUXER and CONFIG_WAV_DEMUXER now probably need to depend on replaygain.o. (I made the same mistake recently.) Cheers, Moritz