+#define FLAGS (o->type == FF_OPT_TYPE_FLAGS) ? AV_DICT_APPEND : 0
+#define SET_PREFIXED_OPTS(ch, flag, output) \
+ if (opt[0] == ch && avcodec_opts[0] && (o = av_opt_find(avcodec_opts[0], opt+1, NULL, flag, 0)))\
+ av_dict_set(&output, opt+1, arg, FLAGS);
+static int opt_default2(const char *opt, const char *arg)
+{
+ const AVOption *o;
+ if ((o = av_opt_find(avcodec_opts[0], opt, NULL, 0, AV_OPT_SEARCH_CHILDREN))) {
+ if (o->flags & AV_OPT_FLAG_VIDEO_PARAM)
+ av_dict_set(&video_opts, opt, arg, FLAGS);
+ if (o->flags & AV_OPT_FLAG_AUDIO_PARAM)
+ av_dict_set(&audio_opts, opt, arg, FLAGS);
+ if (o->flags & AV_OPT_FLAG_SUBTITLE_PARAM)
+ av_dict_set(&sub_opts, opt, arg, FLAGS);
+ } else if ((o = av_opt_find(avformat_opts, opt, NULL, 0, AV_OPT_SEARCH_CHILDREN)))
+ av_dict_set(&format_opts, opt, arg, FLAGS);
+ else if ((o = av_opt_find(sws_opts, opt, NULL, 0, AV_OPT_SEARCH_CHILDREN))) {
+ // XXX we only support sws_flags, not arbitrary sws options
+ int ret = av_set_string3(sws_opts, opt, arg, 1, NULL);
+ if (ret < 0) {
+ av_log(NULL, AV_LOG_ERROR, "Error setting option %s.\n", opt);
+ return ret;
+ }
+ }
+
+ if (!o) {
+ SET_PREFIXED_OPTS('v', AV_OPT_FLAG_VIDEO_PARAM, video_opts)
+ SET_PREFIXED_OPTS('a', AV_OPT_FLAG_AUDIO_PARAM, audio_opts)
+ SET_PREFIXED_OPTS('s', AV_OPT_FLAG_SUBTITLE_PARAM, sub_opts)
+ }
+
+ if (o)
+ return 0;
+ fprintf(stderr, "Unrecognized option '%s'\n", opt);
+ return AVERROR_OPTION_NOT_FOUND;
+}
+