+ if (img_convert_ctx == NULL) {
+ img_convert_ctx = sws_getContext(c->width, c->height,
+ PIX_FMT_YUV420P,
+ c->width, c->height,
+ c->pix_fmt,
+ sws_flags, NULL, NULL, NULL);
+ if (img_convert_ctx == NULL) {
+ fprintf(stderr, "Cannot initialize the conversion context\n");
+ exit(1);
+ }
+ }