Error with Get_iPlayer

Ubuntu 12.04 Dell 2400 1GB ram

please could some explain what I have to do to correct Get_iPlayer errors and when I could get " avconv " from as in the first error.

Thank you for any help

Richard

First Error>>>>>>>>>>>
ffmpeg version 0.8.6-4:0.8.6-0ubuntu0.12.04.1, Copyright (c) 2000-2013 the Libav developers
  built on Apr 2 2013 17:00:59 with gcc 4.6.3
*** THIS PROGRAM IS DEPRECATED ***
This program is only provided for compatibility and will be removed in a future release. Please use avconv instead.
[flv @ 0x9984a80] Estimating duration from bitrate, this may be inaccurate
Second Error:>>>>>>>>>
RTMPDump v2.4
(c) 2010 Andrej Stepanchuk, Howard Chu, The Flvstreamer Team; license: GPL
Connecting ...
INFO: Connected...
ERROR: RTMP_ReadPacket, failed to read RTMP packet header
INFO: Command exit code 1 (raw code = 256)
WARNING: Failed to stream file /home/richard/Gardeners_World_-_2013_Episode_12_b02w88wy_default.partial.mp4.flv via RTMP
INFO: skipping flashhigh1 mode