Msg: non-existing SPS 0 referenced in buffering period

[Nick Payne]

I'm using GiP 2.94 on Windows 10 x64. The command line I use for 
download is:

get_iplayer --pid=xxxxxxxx --modes=hlsbest

Every single program I download shows the error msg I've given in the 
title in the terminal window. The downloads all complete successfully 
and the files play without any problem. Here's the part of the terminal 
output surrounding the msg (it always appears twice):

ffmpeg version 2.2.3 Copyright (c) 2000-2014 the FFmpeg developers
   built on Jun 19 2014 20:24:25 with gcc 4.8.3 (GCC)
   configuration: --enable-gpl --enable-version3 --disable-w32threads 
--enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r 
--enable-gnutls --enable-iconv --enable-libass --enable-libbluray 
--enable-libcaca --enable-libfreetype --enable-libgme --enable-libgsm 
--enable-libilbc --enable-libmodplug --enable-libmp3lame 
--enable-libopencore-amrnb --enable-libopencore-amrwb 
--enable-libopenjpeg --enable-libopus --enable-librtmp 
--enable-libschroedinger --enable-libsoxr --enable-libspeex 
--enable-libtheora --enable-libtwolame --enable-libvidstab 
--enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis 
--enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 
--enable-libx265 --enable-libxavs --enable-libxvid --enable-decklink 
--enable-zlib
   libavutil      52. 66.100 / 52. 66.100
   libavcodec     55. 52.102 / 55. 52.102
   libavformat    55. 33.100 / 55. 33.100
   libavdevice    55. 10.100 / 55. 10.100
   libavfilter     4.  2.100 /  4.  2.100
   libswscale      2.  5.102 /  2.  5.102
   libswresample   0. 18.100 /  0. 18.100
   libpostproc    52.  3.100 / 52.  3.100
[h264 @ 02a3a520] non-existing SPS 0 referenced in buffering period
     Last message repeated 1 times
[h264 @ 05704040] non-existing SPS 0 referenced in buffering period
Input #0, hls,applehttp, from 
'http://cp401489-vh.akamaihd.net/i/iplayerstream/secure_auth/,400kbps/modav/bUnknown-94269304-a1c6-4bc4-9fd8-6715141d7a1b_p03c3yq9_1450181900755,480kbps/modav/bUnknown-94269304-a1c6-4bc4-9fd8-6715141d7a1b_p03c3yq9_1450181892745,800kbps/modav/bUnknown-94269304-a1c6-4bc4-9fd8-6715141d7a1b_p03c3yq9_1450181899250,1500kbps/modav/bUnknown-94269304-a1c6-4bc4-9fd8-6715141d7a1b_p03c3yq9_1450181897590,.mp4.csmil/index_3_av.m3u8?hdnea=st=1450297038~exp=1450318638~acl=/*400kbps/modav/bUnknown-94269304-a1c6-4bc4-9fd8-6715141d7a1b_p03c3yq9_1450181900755,480kbps/modav/bUnknown-94269304-a1c6-4bc4-9fd8-6715141d7a1b_p03c3yq9_1450181892745,800kbps/modav/bUnknown-94269304-a1c6-4bc4-9fd8-6715141d7a1b_p03c3yq9_1450181899250,1500kbps/modav/bUnknown-94269304-a1c6-4bc4-9fd8-6715141d7a1b_p03c3yq9_1450181897590*~hmac=d2dd821878b39b57c676325550a0c01daeaa8092db826ceba95657afbc620338':