On Sat, Jun 13, 2020, at 9:49 AM, Paul B Mahol wrote: [...] > +static int mcc_read_header(AVFormatContext *s) > +{ > + MCCContext *mcc = s->priv_data; > + AVStream *st = avformat_new_stream(s, NULL); > + AVRational rate; > + int64_t ts, pos; > + ptrdiff_t len; ‘len’ set but not used