+ printf("\n }");
+}
+
+static Writer json_writer = {
+ .name = "json",
+ .priv_size = sizeof(JSONContext),
+
+ .init = json_init,
+ .uninit = json_uninit,
+ .print_header = json_print_header,
+ .print_footer = json_print_footer,
+ .print_chapter_header = json_print_chapter_header,
+ .print_chapter_footer = json_print_chapter_footer,
+ .print_section_header = json_print_section_header,
+ .print_section_footer = json_print_section_footer,
+ .print_integer = json_print_int,
+ .print_string = json_print_str,
+ .show_tags = json_show_tags,
+};
+
+static void writer_register_all(void)
+{
+ static int initialized;
+
+ if (initialized)
+ return;
+ initialized = 1;
+
+ writer_register(&default_writer);
+ writer_register(&json_writer);
+}
+
+#define print_fmt(k, f, ...) do { \
+ if (fast_asprintf(&pbuf, f, __VA_ARGS__)) \
+ writer_print_string(w, k, pbuf.s); \
+} while (0)
+
+#define print_int(k, v) writer_print_integer(w, k, v)
+#define print_str(k, v) writer_print_string(w, k, v)
+#define print_ts(k, v) writer_print_string(w, k, ts_value_string (val_str, sizeof(val_str), v))
+#define print_time(k, v, tb) writer_print_string(w, k, time_value_string(val_str, sizeof(val_str), v, tb))
+#define print_val(k, v, u) writer_print_string(w, k, value_string (val_str, sizeof(val_str), \
+ (struct unit_value){.val.i = v, .unit=u}))
+#define print_section_header(s) writer_print_section_header(w, s)
+#define print_section_footer(s) writer_print_section_footer(w, s)
+#define show_tags(metadata) writer_show_tags(w, metadata)
+
+static void show_packet(WriterContext *w, AVFormatContext *fmt_ctx, AVPacket *pkt, int packet_idx)
+{
+ char val_str[128];
+ AVStream *st = fmt_ctx->streams[pkt->stream_index];
+ struct print_buf pbuf = {.s = NULL};
+
+ print_section_header("packet");
+ print_str("codec_type", av_x_if_null(av_get_media_type_string(st->codec->codec_type), "unknown"));
+ print_int("stream_index", pkt->stream_index);
+ print_ts ("pts", pkt->pts);
+ print_time("pts_time", pkt->pts, &st->time_base);
+ print_ts ("dts", pkt->dts);
+ print_time("dts_time", pkt->dts, &st->time_base);
+ print_ts ("duration", pkt->duration);
+ print_time("duration_time", pkt->duration, &st->time_base);
+ print_val("size", pkt->size, unit_byte_str);
+ print_fmt("pos", "%"PRId64, pkt->pos);
+ print_fmt("flags", "%c", pkt->flags & AV_PKT_FLAG_KEY ? 'K' : '_');
+ print_section_footer("packet");
+