AVFilterFormats *fmts = filter_ctx->outputs[i]->in_formats;
for (j = 0; j < fmts->nb_formats; j++)
printf("OUTPUT[%d] %s: %s\n",
AVFilterFormats *fmts = filter_ctx->outputs[i]->in_formats;
for (j = 0; j < fmts->nb_formats; j++)
printf("OUTPUT[%d] %s: %s\n",