Update:

- add more debug output for 'play' handler to view all chained calls
- fix gcc compilation fail or live module with ```-Werror``` option
  - wrap var definition with debug enabled check

ngx_rtmp_access_module.c

@@ -449,10 +449,17 @@ next:
 static ngx_int_t
 ngx_rtmp_access_play(ngx_rtmp_session_t *s, ngx_rtmp_play_t *v)
 {
+    ngx_log_error(NGX_LOG_DEBUG, s->connection->log, 0,
+                  "access: ngx_rtmp_access_play");
+
     if (ngx_rtmp_access(s, NGX_RTMP_ACCESS_PLAY) != NGX_OK) {
+        ngx_log_error(NGX_LOG_DEBUG, s->connection->log, 0,
+                      "access: ngx_rtmp_access_play: error");
         return NGX_ERROR;
     }
 
+    ngx_log_error(NGX_LOG_DEBUG, s->connection->log, 0,
+                  "access: ngx_rtmp_access_play: next");
     return next_play(s, v);
 }
 

ngx_rtmp_cmd_module.c

@@ -574,6 +574,8 @@ ngx_rtmp_cmd_play_init(ngx_rtmp_session_t *s, ngx_rtmp_header_t *h,
 static ngx_int_t
 ngx_rtmp_cmd_play(ngx_rtmp_session_t *s, ngx_rtmp_play_t *v)
 {
+    ngx_log_error(NGX_LOG_DEBUG, s->connection->log, 0,
+                  "cmd: ngx_rtmp_cmd_play");
     return NGX_OK;
 }
 

ngx_rtmp_exec_module.c

@@ -1194,6 +1194,9 @@ next:
 static ngx_int_t
 ngx_rtmp_exec_play(ngx_rtmp_session_t *s, ngx_rtmp_play_t *v)
 {
+    ngx_log_error(NGX_LOG_DEBUG, s->connection->log, 0,
+                  "exec: ngx_rtmp_exec_play");
+
     ngx_rtmp_exec_ctx_t       *ctx;
     ngx_rtmp_exec_pull_ctx_t  *pctx;
     ngx_rtmp_exec_app_conf_t  *eacf;
@@ -1224,6 +1227,8 @@ ngx_rtmp_exec_play(ngx_rtmp_session_t *s, ngx_rtmp_play_t *v)
     }
 
 next:
+    ngx_log_error(NGX_LOG_DEBUG, s->connection->log, 0,
+              "exec: ngx_rtmp_exec_play: next");
     return next_play(s, v);
 }
 

ngx_rtmp_live_module.c

@@ -1056,9 +1056,11 @@ ngx_rtmp_live_data(ngx_rtmp_session_t *s, ngx_rtmp_header_t *h,
     uint32_t                        delta;
     ngx_rtmp_live_chunk_stream_t   *cs;
 
+#ifdef NGX_DEBUG
     u_char                         *msg_type;
 
     msg_type = (u_char *)out_elts[0].data;
+#endif
 
     lacf = ngx_rtmp_get_module_app_conf(s, ngx_rtmp_live_module);
     if (lacf == NULL) {
@@ -1099,6 +1101,8 @@ ngx_rtmp_live_data(ngx_rtmp_session_t *s, ngx_rtmp_header_t *h,
     data = NULL;
     rc = ngx_rtmp_append_amf(s, &data, NULL, out_elts, out_elts_size);
     if (rc != NGX_OK) {
+        ngx_log_error(NGX_LOG_DEBUG, s->connection->log, 0,
+                      "live: data - can't append amf!");
         if (data) {
             ngx_rtmp_free_shared_chain(cscf, data);
         }
@@ -1148,7 +1152,7 @@ ngx_rtmp_live_data(ngx_rtmp_session_t *s, ngx_rtmp_header_t *h,
 
     return NGX_OK;
 }
-
+/*
 static ngx_int_t
 ngx_rtmp_live_on_cue_point(ngx_rtmp_session_t *s, ngx_rtmp_header_t *h,
                            ngx_chain_t *in)
@@ -1178,7 +1182,7 @@ ngx_rtmp_live_on_text_data(ngx_rtmp_session_t *s, ngx_rtmp_header_t *h,
     return ngx_rtmp_live_data(s, h, in, out_elts,
             sizeof(out_elts) / sizeof(out_elts[0]));
 }
-
+*/
 static ngx_int_t
 ngx_rtmp_live_on_fi(ngx_rtmp_session_t *s, ngx_rtmp_header_t *h,
                            ngx_chain_t *in)
@@ -1426,6 +1430,9 @@ next:
 static ngx_int_t
 ngx_rtmp_live_play(ngx_rtmp_session_t *s, ngx_rtmp_play_t *v)
 {
+    ngx_log_error(NGX_LOG_DEBUG, s->connection->log, 0,
+                   "live: ngx_rtmp_live_play");
+
     ngx_rtmp_live_app_conf_t       *lacf;
     ngx_rtmp_live_ctx_t            *ctx;
 
@@ -1458,6 +1465,8 @@ ngx_rtmp_live_play(ngx_rtmp_session_t *s, ngx_rtmp_play_t *v)
     }
 
 next:
+    ngx_log_error(NGX_LOG_DEBUG, s->connection->log, 0,
+              "live: ngx_rtmp_live_play: next");
     return next_play(s, v);
 }
 

ngx_rtmp_log_module.c

@@ -853,6 +853,9 @@ next:
 static ngx_int_t
 ngx_rtmp_log_play(ngx_rtmp_session_t *s, ngx_rtmp_play_t *v)
 {
+    ngx_log_error(NGX_LOG_DEBUG, s->connection->log, 0,
+                  "log: ngx_rtmp_log_play");
+
     ngx_rtmp_log_ctx_t *ctx;
 
     if (s->auto_pushed || s->relay) {
@@ -867,6 +870,8 @@ ngx_rtmp_log_play(ngx_rtmp_session_t *s, ngx_rtmp_play_t *v)
     ctx->play = 1;
 
 next:
+    ngx_log_error(NGX_LOG_DEBUG, s->connection->log, 0,
+              "log: ngx_rtmp_log_play: next");
     return next_play(s, v);
 }
 

ngx_rtmp_notify_module.c

@@ -1300,6 +1300,9 @@ static ngx_int_t
 ngx_rtmp_notify_play_handle(ngx_rtmp_session_t *s,
         void *arg, ngx_chain_t *in)
 {
+    ngx_log_debug(NGX_LOG_DEBUG, s->connection->log, 0,
+                  "notify: ngx_rtmp_notify_play_handle");
+
     ngx_rtmp_play_t            *v = arg;
     ngx_int_t                   rc, send;
     ngx_str_t                   local_name;
@@ -1393,6 +1396,8 @@ ngx_rtmp_notify_play_handle(ngx_rtmp_session_t *s,
     ngx_rtmp_relay_pull(s, &local_name, &target);
 
 next:
+    ngx_log_debug(NGX_LOG_DEBUG, s->connection->log, 0,
+              "notify: ngx_rtmp_notify_play_handle: next");
 
     return next_play(s, v);
 }
@@ -1636,6 +1641,9 @@ next:
 static ngx_int_t
 ngx_rtmp_notify_play(ngx_rtmp_session_t *s, ngx_rtmp_play_t *v)
 {
+    ngx_log_error(NGX_LOG_DEBUG, s->connection->log, 0,
+                  "notify: ngx_rtmp_notify_play");
+
     ngx_rtmp_notify_app_conf_t     *nacf;
     ngx_rtmp_netcall_init_t         ci;
     ngx_url_t                      *url;
@@ -1671,6 +1679,9 @@ ngx_rtmp_notify_play(ngx_rtmp_session_t *s, ngx_rtmp_play_t *v)
     return ngx_rtmp_netcall_create(s, &ci);
 
 next:
+    ngx_log_error(NGX_LOG_DEBUG, s->connection->log, 0,
+              "notify: ngx_rtmp_notify_play: next");
+
     return next_play(s, v);
 }
 

ngx_rtmp_play_module.c

@@ -716,6 +716,9 @@ ngx_rtmp_play_parse_index(char type, u_char *args)
 static ngx_int_t
 ngx_rtmp_play_play(ngx_rtmp_session_t *s, ngx_rtmp_play_t *v)
 {
+    ngx_log_error(NGX_LOG_DEBUG, s->connection->log, 0,
+                  "play: ngx_rtmp_play_play");
+
     ngx_rtmp_play_main_conf_t      *pmcf;
     ngx_rtmp_play_app_conf_t       *pacf;
     ngx_rtmp_play_ctx_t            *ctx;
@@ -827,9 +830,15 @@ ngx_rtmp_play_play(ngx_rtmp_session_t *s, ngx_rtmp_play_t *v)
     ngx_log_debug1(NGX_LOG_DEBUG_RTMP, s->connection->log, 0,
                    "play: fmt=%V", &ctx->fmt->name);
 
+    ngx_log_error(NGX_LOG_DEBUG, s->connection->log, 0,
+                  "play: ngx_rtmp_play_play: next_entry");
+
     return ngx_rtmp_play_next_entry(s, v);
 
 next:
+    ngx_log_error(NGX_LOG_DEBUG, s->connection->log, 0,
+              "play: ngx_rtmp_play_play: next");
+
     return next_play(s, v);
 }
 
@@ -837,6 +846,9 @@ next:
 static ngx_int_t
 ngx_rtmp_play_next_entry(ngx_rtmp_session_t *s, ngx_rtmp_play_t *v)
 {
+    ngx_log_error(NGX_LOG_DEBUG, s->connection->log, 0,
+                  "play: ngx_rtmp_play_next_entry");
+
     ngx_rtmp_play_app_conf_t   *pacf;
     ngx_rtmp_play_ctx_t        *ctx;
     ngx_rtmp_play_entry_t      *pe;
@@ -881,6 +893,9 @@ ngx_rtmp_play_next_entry(ngx_rtmp_session_t *s, ngx_rtmp_play_t *v)
         /* open remote */
 
         if (pe->url) {
+            ngx_log_error(NGX_LOG_DEBUG, s->connection->log, 0,
+                          "play: ngx_rtmp_play_next_entry: open remote");
+
             return ngx_rtmp_play_open_remote(s, v);
         }
 
@@ -917,12 +932,19 @@ ngx_rtmp_play_next_entry(ngx_rtmp_session_t *s, ngx_rtmp_play_t *v)
                        "play: open local file '%s'", path);
 
         if (ngx_rtmp_play_open(s, v->start) != NGX_OK) {
+
+            ngx_log_error(NGX_LOG_DEBUG, s->connection->log, 0,
+                          "play: ngx_rtmp_play_next_entry: error open");
+
             return NGX_ERROR;
         }
 
         break;
     }
 
+    ngx_log_error(NGX_LOG_DEBUG, s->connection->log, 0,
+                  "play: ngx_rtmp_play_next_entry: next");
+
     return next_play(s, v);
 }
 
@@ -1048,6 +1070,9 @@ ngx_rtmp_play_remote_create(ngx_rtmp_session_t *s, void *arg, ngx_pool_t *pool)
 static ngx_int_t
 ngx_rtmp_play_remote_handle(ngx_rtmp_session_t *s, void *arg, ngx_chain_t *in)
 {
+    ngx_log_error(NGX_LOG_DEBUG, s->connection->log, 0,
+                  "play: ngx_rtmp_play_remote_handle");
+
     ngx_rtmp_play_t        *v = arg;
 
     ngx_rtmp_play_ctx_t    *ctx;
@@ -1055,6 +1080,8 @@ ngx_rtmp_play_remote_handle(ngx_rtmp_session_t *s, void *arg, ngx_chain_t *in)
     ctx = ngx_rtmp_get_module_ctx(s, ngx_rtmp_play_module);
 
     if (ctx->nbody == 0) {
+        ngx_log_error(NGX_LOG_DEBUG, s->connection->log, 0,
+                      "play: ngx_rtmp_play_remote_handle: next_entry");
         return ngx_rtmp_play_next_entry(s, v);
     }
 
@@ -1066,9 +1093,16 @@ ngx_rtmp_play_remote_handle(ngx_rtmp_session_t *s, void *arg, ngx_chain_t *in)
                    "play: open remote file");
 
     if (ngx_rtmp_play_open(s, v->start) != NGX_OK) {
+
+        ngx_log_error(NGX_LOG_DEBUG, s->connection->log, 0,
+                      "play: ngx_rtmp_play_remote_handle: error open");
+
         return NGX_ERROR;
     }
 
+    ngx_log_error(NGX_LOG_DEBUG, s->connection->log, 0,
+                  "play: ngx_rtmp_play_remote_handle: next");
+
     return next_play(s, (ngx_rtmp_play_t *)arg);
 }
 

ngx_rtmp_relay_module.c

@@ -710,6 +710,9 @@ next:
 static ngx_int_t
 ngx_rtmp_relay_play(ngx_rtmp_session_t *s, ngx_rtmp_play_t *v)
 {
+    ngx_log_error(NGX_LOG_DEBUG, s->connection->log, 0,
+                  "relay: ngx_rtmp_relay_play");
+
     ngx_rtmp_relay_app_conf_t      *racf;
     ngx_rtmp_relay_target_t        *target, **t;
     ngx_str_t                       name;
@@ -751,6 +754,9 @@ ngx_rtmp_relay_play(ngx_rtmp_session_t *s, ngx_rtmp_play_t *v)
     }
 
 next:
+    ngx_log_error(NGX_LOG_DEBUG, s->connection->log, 0,
+              "relay: ngx_rtmp_relay_play: next");
+
     return next_play(s, v);
 }