From 9f5baf90856f8afa0d94c2bf1dc31f485ef72a13 Mon Sep 17 00:00:00 2001
From: Rodger Combs <rodger.combs@gmail.com>
Date: Tue, 24 Nov 2015 03:20:09 -0600
Subject: [PATCH] lavc/aac_ac3_parser: avoid zeroing codec parameters if we
 haven't read a frame

This caused issues when seeking in some unusual MPEGTS files
---
 libavcodec/aac_ac3_parser.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/libavcodec/aac_ac3_parser.c b/libavcodec/aac_ac3_parser.c
index 2f7d56807c..6a76eb8ec2 100644
--- a/libavcodec/aac_ac3_parser.c
+++ b/libavcodec/aac_ac3_parser.c
@@ -34,6 +34,7 @@ int ff_aac_ac3_parse(AVCodecParserContext *s1,
     ParseContext *pc = &s->pc;
     int len, i;
     int new_frame_start;
+    int got_frame = 0;
 
 get_next:
     i=END_NOT_FOUND;
@@ -51,6 +52,7 @@ get_next:
             if(len<=0){
                 i=END_NOT_FOUND;
             }else{
+                got_frame = 1;
                 s->state=0;
                 i-= s->header_size -1;
                 s->remaining_size = len;
@@ -76,6 +78,7 @@ get_next:
     if(s->codec_id)
         avctx->codec_id = s->codec_id;
 
+    if (got_frame) {
     /* Due to backwards compatible HE-AAC the sample rate, channel count,
        and total number of samples found in an AAC ADTS header are not
        reliable. Bit rate is still accurate because the total frame duration in
@@ -101,6 +104,7 @@ get_next:
     }
 
     avctx->bit_rate = s->bit_rate;
+    }
 
     return i;
 }