diff --git a/src/httpc.c b/src/httpc.c
index 4bc2dbbc3..742b0f693 100644
--- a/src/httpc.c
+++ b/src/httpc.c
@@ -1026,11 +1026,15 @@ retry:
   }
 
   if (hc->hc_rsize < r + hc->hc_rpos) {
-    if (hc->hc_rsize + r > hc->hc_io_size + 20*1024)
+    if (hc->hc_rsize + r > hc->hc_io_size + 20*1024) {
+      tvhtrace(LS_HTTPC, "%04X: overflow, buf %zd read %zd io %zd", shortid(hc), hc->hc_rsize, r, hc->hc_io_size);
+      tvhlog_hexdump(LS_HTTPC, hc->hc_rbuf, 16);
       return http_client_flush(hc, -EMSGSIZE);
+    }
     hc->hc_rsize += r;
     hc->hc_rbuf = realloc(hc->hc_rbuf, hc->hc_rsize + 1);
   }
+  tvhtrace(LS_HTTPC, "%04X: new data %zd", shortid(hc), r);
   memcpy(hc->hc_rbuf + hc->hc_rpos, buf, r);
   hc->hc_rpos += r;
 
@@ -1135,14 +1139,18 @@ rtsp_data:
   r = 0;
   hc->hc_in_data = 0;
   hc->hc_in_rtp_data = 0;
+  tvhtrace(LS_HTTPC, "%04X: rtsp data %zd", shortid(hc), hc->hc_rpos);
   while (hc->hc_rpos > r + 3) {
     if (hc->hc_rbuf[r] != '$')
       break;
     hc->hc_csize = 4 + ((hc->hc_rbuf[r+2] << 8) | hc->hc_rbuf[r+3]);
+    tvhtrace(LS_HTTPC, "%04X: rtsp data chunk %zd", shortid(hc), hc->hc_csize);
     hc->hc_chunked = 0;
     if (r + hc->hc_csize > hc->hc_rpos) {
       http_client_rbuf_cut(hc, r);
       hc->hc_in_rtp_data = 1;
+      tvhtrace(LS_HTTPC, "%04X: rtsp data incomplete %zd", shortid(hc), r);
+      tvhlog_hexdump(LS_HTTPC, hc->hc_rbuf, 16);
       if (r == 0)
         goto retry;
       return HTTP_CON_RECEIVING;
@@ -1156,6 +1164,7 @@ rtsp_data:
       if (res < 0)
         return res;
     }
+    tvhtrace(LS_HTTPC, "%04X: rtsp data cont %zd", shortid(hc), hc->hc_csize);
     r += hc->hc_csize;
     hc->hc_in_rtp_data = 1;
     hc->hc_code = 0;
@@ -1166,6 +1175,8 @@ rtsp_data:
   }
   if (r > 0) {
     http_client_rbuf_cut(hc, r);
+    tvhtrace(LS_HTTPC, "%04X: rtsp data next header %zd (cut %zd)", shortid(hc), hc->hc_rpos, r);
+    tvhlog_hexdump(LS_HTTPC, hc->hc_rbuf, 16);
     goto next_header;
   }
   return HTTP_CON_RECEIVING;