rv20: error messages with "Enable Loss Protection"-encoded file

[ami_stuff]

"g2svt_loss_protection.rm" file was encoded with enabled "Enable Loss Protection" option in encoder

"Protects against packet loss by adding error correction codes and more keyframes to the video stream when possible"

I attached also rv30 file (with loss protection enabled) which decodes without any errors messages

this ticket is either about fixing decoding of attached rv20 file (didn't check the output with binary decoder) or just about removing console spam

C:\>ffmpeg -i C:\g2svt_loss_protection.rm out.avi
ffmpeg version 3.2.git Copyright (c) 2000-2017 the FFmpeg developers
  built with gcc 4.6.2 (GCC)
  configuration: --disable-ffprobe --disable-pthreads --enable-gpl
  libavutil      55. 48.100 / 55. 48.100
  libavcodec     57. 83.100 / 57. 83.100
  libavformat    57. 66.104 / 57. 66.104
  libavdevice    57.  3.100 / 57.  3.100
  libavfilter     6. 74.100 /  6. 74.100
  libswscale      4.  3.101 /  4.  3.101
  libswresample   2.  4.100 /  2.  4.100
  libpostproc    54.  2.100 / 54.  2.100
[rm @ 02383d40] Invalid stream index 2 for index at pos 185120
[cook @ 0238d260] Warning: not compiled with thread support, using thread emulat
ion
[rv20 @ 02718120] Warning: not compiled with thread support, using thread emulat
ion
Input #0, rm, from 'C:\g2svt_loss_protection.rm':
  Metadata:
    Target Audiences: 512K DSL/Cable Modem (450 Kbps);
    Audio Format    : Voice Only
    Video Quality   : Smoothest Motion Video
    Creation Date   : 3/12/2017 1:14:58
    Modification Date: 3/12/2017 1:14:58
    Generated By    : RealMedia Build Engine 6.0.11.201 Windows
    File ID         : a3a2326f-7485-44de-66ea-b1dbd07e92bf
    title           :
    author          :
    copyright       :
    comment         :
  Duration: 00:00:03.71, start: 0.000000, bitrate: 398 kb/s
    Stream #0:0: Audio: cook (cook / 0x6B6F6F63), 44100 Hz, mono, fltp, 64 kb/s
    Stream #0:1: Video: rv20 (RV20 / 0x30325652), yuv420p, 720x480, 385 kb/s, 30
 fps, 30 tbr, 1k tbn, 1k tbc
[cook @ 02729bc0] Warning: not compiled with thread support, using thread emulat
ion
[rv20 @ 027293a0] Warning: not compiled with thread support, using thread emulat
ion
Stream mapping:
  Stream #0:1 -> #0:0 (rv20 (native) -> mpeg4 (native))
  Stream #0:0 -> #0:1 (cook (native) -> ac3 (native))
Press [q] to stop, [?] for help
[ac3 @ 027c3880] Warning: not compiled with thread support, using thread emulati
on
[rv20 @ 027293a0] reserved bit set
[rv20 @ 027293a0] HEADER ERROR
Error while decoding stream #0:1: Invalid data found when processing input
[rv20 @ 027293a0] reserved bit set
[rv20 @ 027293a0] HEADER ERROR
Error while decoding stream #0:1: Invalid data found when processing input
[mpeg4 @ 02746880] Warning: not compiled with thread support, using thread emula
tion
Output #0, avi, to 'out.avi':
  Metadata:
    Target Audiences: 512K DSL/Cable Modem (450 Kbps);
    Audio Format    : Voice Only
    Video Quality   : Smoothest Motion Video
    Creation Date   : 3/12/2017 1:14:58
    Modification Date: 3/12/2017 1:14:58
    Generated By    : RealMedia Build Engine 6.0.11.201 Windows
    File ID         : a3a2326f-7485-44de-66ea-b1dbd07e92bf
    INAM            :
    author          :
    ICOP            :
    ICMT            :
    ISFT            : Lavf57.66.104
    Stream #0:0: Video: mpeg4 (FMP4 / 0x34504D46), yuv420p, 360x480 [SAR 2:1 DAR
 3:2], q=2-31, 200 kb/s, 30 fps, 30 tbn, 30 tbc
    Metadata:
      encoder         : Lavc57.83.100 mpeg4
    Side data:
      cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: -1
    Stream #0:1: Audio: ac3 ([0] [0][0] / 0x2000), 44100 Hz, mono, fltp, 96 kb/s

    Metadata:
      encoder         : Lavc57.83.100 ac3
Past duration 0.929985 too large
[rv20 @ 027293a0] reserved bit set
[rv20 @ 027293a0] HEADER ERROR
Error while decoding stream #0:1: Invalid data found when processing input
[rv20 @ 027293a0] reserved bit set
[rv20 @ 027293a0] HEADER ERROR
Error while decoding stream #0:1: Invalid data found when processing input
Past duration 0.929985 too large
[rv20 @ 027293a0] reserved bit set
[rv20 @ 027293a0] HEADER ERROR
Error while decoding stream #0:1: Invalid data found when processing input
Past duration 0.939995 too large
[rv20 @ 027293a0] reserved bit set
[rv20 @ 027293a0] HEADER ERROR
Error while decoding stream #0:1: Invalid data found when processing input
Past duration 0.949989 too large
[rv20 @ 027293a0] reserved bit set
[rv20 @ 027293a0] HEADER ERROR
Error while decoding stream #0:1: Invalid data found when processing input
Past duration 0.929985 too large
[rv20 @ 027293a0] reserved bit set
[rv20 @ 027293a0] HEADER ERROR
Error while decoding stream #0:1: Invalid data found when processing input
Past duration 0.939995 too large
[rv20 @ 027293a0] reserved bit set
[rv20 @ 027293a0] HEADER ERROR
Error while decoding stream #0:1: Invalid data found when processing input
Past duration 0.949989 too large
[rv20 @ 027293a0] reserved bit set
[rv20 @ 027293a0] HEADER ERROR
Error while decoding stream #0:1: Invalid data found when processing input
Past duration 0.929985 too large
[rv20 @ 027293a0] reserved bit set
[rv20 @ 027293a0] HEADER ERROR
Error while decoding stream #0:1: Invalid data found when processing input
Past duration 0.939995 too large
[rv20 @ 027293a0] reserved bit set
[rv20 @ 027293a0] HEADER ERROR
Error while decoding stream #0:1: Invalid data found when processing input
Past duration 0.949989 too large
[rv20 @ 027293a0] reserved bit set
[rv20 @ 027293a0] HEADER ERROR
Error while decoding stream #0:1: Invalid data found when processing input
Past duration 0.929985 too large
Past duration 0.969994 too large
[rv20 @ 027293a0] reserved bit set
[rv20 @ 027293a0] HEADER ERROR
Error while decoding stream #0:1: Invalid data found when processing input
Past duration 0.959999 too large
frame=   29 fps=0.0 q=14.3 Lsize=     142kB time=00:00:03.72 bitrate= 311.3kbits
/s dup=0 drop=13 speed=23.9x
video:85kB audio:43kB subtitle:0kB other streams:0kB global headers:0kB muxing o
verhead: 10.656056%