[FFmpeg-devel] [PATCH v4 1/2] fftools: add options to dump filter graph

[Limin Wang]

On Sat, May 23, 2020 at 04:52:47PM +0200, Nicolas George wrote:
> Limin Wang (12020-05-23):
> > > In this case, transforming the string into an AVDictionary, passing it
> > > around and warning if there are remaining options should be the simplest
> > > choice.
> > 
> > So I should to use av_find_info_tag to parse the options string?  any sample code
> > in the existing code for refering?
> 
> What?!? Definitely not. Have you read its doc? It is made for URLs, we
> do not have any URL here.

I'm not clear about the char * option usage yet, below is my draft code, am I
understand for you correctly?


+    int ret;
+    AVDictionary *dict = NULL;
+    AVDictionaryEntry *format = NULL;

+    ret = av_dict_parse_string(&dict, options, "=", ":", 0);
+    if (ret < 0) {
+        av_dict_free(&dict);
+        return NULL;
+    }
+    format = av_dict_get(dict, "fmt", NULL, 0);
+
+    if (format && !strcmp(format->value, "DOT")) {
+    av_bprint_init(&buf, 0, AV_BPRINT_SIZE_UNLIMITED);
+    avfilter_graph2dot_to_buf(&buf, graph);
+    av_bprint_finalize(&buf, &dump);
+    } else {



> 
> Regards,
> 
> -- 
>   Nicolas George



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-- 
Thanks,
Limin Wang