Fix valgrind and asan memory leaks and crashes.

libavcodec/utils.c

 /*
  * utils for libavcodec
  * Copyright (c) 2001 Fabrice Bellard
  * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
  *
  * This file is part of FFmpeg.
  *
  * FFmpeg is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
@@ skipping 868 matching lines @@
     }
 
     avctx->pts_correction_num_faulty_pts =
     avctx->pts_correction_num_faulty_dts = 0;
     avctx->pts_correction_last_pts =
     avctx->pts_correction_last_dts = INT64_MIN;
 
     if(avctx->codec->init && !(avctx->active_thread_type&FF_THREAD_FRAME)){
         ret = avctx->codec->init(avctx);
         if (ret < 0) {
+            if(avctx->codec->close)
+                avctx->codec->close(avctx);
             goto free_and_end;
         }
     }
 
     ret=0;
 end:
     entangled_thread_counter--;
 
     /* Release any user-supplied mutex. */
     if (ff_lockmgr_cb) {
@@ skipping 1086 matching lines @@
     else if (codec_id < CODEC_ID_FIRST_UNKNOWN)
         return AVMEDIA_TYPE_SUBTITLE;
 
     return AVMEDIA_TYPE_UNKNOWN;
 }
 
 int avcodec_is_open(AVCodecContext *s)
 {
     return !!s->internal;
 }