From 32d8726a31b79dd4e30922d689f3465edc9d00ba Mon Sep 17 00:00:00 2001
From: Carl Eugen Hoyos <cehoyos@ag.or.at>
Date: Sun, 19 Jul 2015 22:32:17 +0200
Subject: [PATCH] lavf/rtpenc_jpeg: Warn if number of present quantization
 tables is not two.

---
 libavformat/rtpenc_jpeg.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/libavformat/rtpenc_jpeg.c b/libavformat/rtpenc_jpeg.c
index e6b3177fe8..a6f2b32df4 100644
--- a/libavformat/rtpenc_jpeg.c
+++ b/libavformat/rtpenc_jpeg.c
@@ -119,6 +119,10 @@ void ff_rtp_send_jpeg(AVFormatContext *s1, const uint8_t *buf, int size)
             break;
         }
     }
+    if (nb_qtables && nb_qtables != 2)
+        av_log(s1, AV_LOG_WARNING,
+               "RFC 2435 suggests two quantization tables, %d provided\n",
+               nb_qtables);
 
     /* skip JPEG header */
     buf  += i;