int nb_in_channels[2] = { 0, 0 }; // number of unnamed and named input channels
double gain;
if (!pan->args) {
av_log(ctx, AV_LOG_ERROR,
"pan filter needs a channel layout and a set "
int nb_in_channels[2] = { 0, 0 }; // number of unnamed and named input channels
double gain;
if (!pan->args) {
av_log(ctx, AV_LOG_ERROR,
"pan filter needs a channel layout and a set "