buf_out->data[0] = buf_out->extended_data[0] = buf_out->extended_data[i];
buf_out->channel_layout =
av_channel_layout_extract_channel(buf->channel_layout, i);
- av_frame_set_channels(buf_out, 1);
+ buf_out->channels = 1;
ret = ff_filter_frame(ctx->outputs[i], buf_out);
if (ret < 0)