Fix valgrind and asan memory leaks and crashes.

libavformat/utils.c

 /*
  * various utility functions for use within FFmpeg
  * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
  *
  * 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
  * version 2.1 of the License, or (at your option) any later version.
@@ skipping 577 matching lines @@
             if ((ret = av_opt_set_dict(s->priv_data, &tmp)) < 0)
                 goto fail;
         }
     }
 
     /* e.g. AVFMT_NOFILE formats will not have a AVIOContext */
     if (s->pb)
         ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC);
 
     if (!(s->flags&AVFMT_FLAG_PRIV_OPT) && s->iformat->read_header)
-        if ((ret = s->iformat->read_header(s)) < 0)
+        if ((ret = s->iformat->read_header(s)) < 0) {
+            s->iformat->read_close(s);
             goto fail;
+        }
 
     if (!(s->flags&AVFMT_FLAG_PRIV_OPT) && s->pb && !s->data_offset)
         s->data_offset = avio_tell(s->pb);
 
     s->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
 
     if (options) {
         av_dict_free(options);
         *options = tmp;
     }
@@ skipping 3594 matching lines @@
 }
 
 const struct AVCodecTag *avformat_get_riff_video_tags(void)
 {
     return ff_codec_bmp_tags;
 }
 const struct AVCodecTag *avformat_get_riff_audio_tags(void)
 {
     return ff_codec_wav_tags;
 }