off = len1 * out->bps;
}
- av_assert0(out->ch_count == av_get_channel_layout_nb_channels(s->out_ch_layout));
- av_assert0(in ->ch_count == av_get_channel_layout_nb_channels(s-> in_ch_layout));
+ av_assert0(!s->out_ch_layout || out->ch_count == av_get_channel_layout_nb_channels(s->out_ch_layout));
+ av_assert0(!s-> in_ch_layout || in ->ch_count == av_get_channel_layout_nb_channels(s-> in_ch_layout));
for(out_i=0; out_i<out->ch_count; out_i++){
switch(s->matrix_ch[out_i][0]){