+
+Tagging using JSON
+------------------
+With --tag-from-json, fdkaac can read JSON file and set tags from it.
+By default, tags are assumed to be in the root object(dictionary) like this:
+
+{
+ "title": "No Expectations",
+ "artist": "The Rolling Stones",
+ "album": "Beggars Banquet",
+ "track": 2
+}
+
+In this case, you can simply specify the filename like:
+--tag-from-json=/path/to/json
+
+If the object containing tags is placed somewhere else, you can optionally
+specify the path of the object with dotted notation.
+
+{
+ "format" : {
+ "filename" : "Middle Curse.flac",
+ "nb_streams" : 1,
+ "format_name" : "flac",
+ "format_long_name" : "raw FLAC",
+ "start_time" : "N/A",
+ "duration" : "216.146667",
+ "size" : "11851007.000000",
+ "bit_rate" : "438628.000000",
+ "tags" : {
+ "ALBUM" : "Scary World Theory",
+ "ARTIST" : "Lali Puna",
+ "DATE" : "2001",
+ "DISCID" : "9208CC0A",
+ "TITLE" : "Middle Curse",
+ "TRACKTOTAL" : "10",
+ "track" : "2"
+ }
+ }
+}
+
+In this example, tags are placed under the object "format.tags".
+("format" is a child of the root, and "tags" is a child of the "format").
+In this case, you can say:
+--tag-from-json=/path/to/json?format.tags
+
+For your information, ffprobe of ffmpeg project (or avprobe of libav) can
+output media information/metadata in json format like this.
+
+Note that not all tags can be read/written this way.