- AVFormatParameters params, *ap= ¶ms;
- memset(ap, 0, sizeof(params));
- ap->channels=1;
- ap->sample_rate= 22050;
+ AVDictionary *format_opts = NULL;
+
+ av_dict_set(&format_opts, "channels", "1", 0);
+ av_dict_set(&format_opts, "sample_rate", "22050", 0);