+ ThreadData *td = arg;
+ AVFrame *in = td->in;
+ AVFrame *out = td->out;
+ const uint8_t *src = in->data[0];
+ uint8_t *dst = out->data[0];
+ const int src_linesize = in->linesize[0];
+ const int dst_linesize = out->linesize[0];
+ const int width = in->width;
+ const int height = in->height;