int i, j;
const AVFilterPad *pad;
- printf("Filters:\n");
+ printf("Filters:\n"
+ " A = Audio input/output\n"
+ " V = Video input/output\n"
+ " N = Dynamic number and/or type of input/output\n"
+ " | = Source or sink filter\n");
#if CONFIG_AVFILTER
while ((filter = avfilter_next(filter))) {
descr_cur = descr;
*(descr_cur++) = get_media_type_char(pad[j].type);
}
if (!j)
- *(descr_cur++) = '|';
+ *(descr_cur++) = ((!i && (filter->flags & AVFILTER_FLAG_DYNAMIC_INPUTS)) ||
+ ( i && (filter->flags & AVFILTER_FLAG_DYNAMIC_OUTPUTS))) ? 'N' : '|';
}
*descr_cur = 0;
printf("%-16s %-10s %s\n", filter->name, descr, filter->description);
show_help_children(fmt->priv_class, AV_OPT_FLAG_ENCODING_PARAM);
}
+#if CONFIG_AVFILTER
static void show_help_filter(const char *name)
{
#if CONFIG_AVFILTER
printf(" Inputs:\n");
count = avfilter_pad_count(f->inputs);
for (i = 0; i < count; i++) {
- printf(" %d %s (%s)\n", i, avfilter_pad_get_name(f->inputs, i),
+ printf(" #%d: %s (%s)\n", i, avfilter_pad_get_name(f->inputs, i),
media_type_string(avfilter_pad_get_type(f->inputs, i)));
}
if (f->flags & AVFILTER_FLAG_DYNAMIC_INPUTS)
printf(" dynamic (depending on the options)\n");
+ else if (!count)
+ printf(" none (source filter)\n");
printf(" Outputs:\n");
count = avfilter_pad_count(f->outputs);
for (i = 0; i < count; i++) {
- printf(" %d %s (%s)\n", i, avfilter_pad_get_name(f->outputs, i),
+ printf(" #%d: %s (%s)\n", i, avfilter_pad_get_name(f->outputs, i),
media_type_string(avfilter_pad_get_type(f->outputs, i)));
}
if (f->flags & AVFILTER_FLAG_DYNAMIC_OUTPUTS)
printf(" dynamic (depending on the options)\n");
+ else if (!count)
+ printf(" none (sink filter)\n");
if (f->priv_class)
show_help_children(f->priv_class, AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM |
AV_OPT_FLAG_AUDIO_PARAM);
+ if (f->flags & AVFILTER_FLAG_SUPPORT_TIMELINE)
+ printf("This filter has support for timeline through the 'enable' option.\n");
#else
av_log(NULL, AV_LOG_ERROR, "Build without libavfilter; "
"can not to satisfy request\n");
#endif
}
+#endif
int show_help(void *optctx, const char *opt, const char *arg)
{
show_help_demuxer(par);
} else if (!strcmp(topic, "muxer")) {
show_help_muxer(par);
+#if CONFIG_AVFILTER
} else if (!strcmp(topic, "filter")) {
show_help_filter(par);
+#endif
} else {
show_help_default(topic, par);
}