Problem started a few days ago, while I was still on version 3.19 (under Win 7). As part of troubleshooting, I updated to version 3.22 but still have same problem.

get_iplayer 3.22.0-MSWin32, Copyright (C) 2008-2010 Phil Lewis
This program comes with ABSOLUTELY NO WARRANTY; for details use --warranty.
This is free software, and you are welcome to redistribute it under certain
conditions; use --conditions for details.


Episodes:
The Repair Shop - 60 Min Versions, Episode 21, BBC One, m00084t3
INFO: 1 total programmes

WARNING: A UK TV licence is required to access BBC iPlayer TV content legally
INFO: Downloading tv: 'The Repair Shop: 60 Min Versions - 21. Episode 21 (m00084
t3) [original]'

INFO: Downloaded: 0.00 MB (00:00:00) @ 0.00 Mb/s (dvfxhigh1/bi) [audio]
WARNING: Failed to download file segment [0]
WARNING: Response: 400 Bad Request
WARNING: Retrying tv: 'The Repair Shop: 60 Min Versions - 21. Episode 21 (m00084
t3) [original]'

INFO: Downloaded: 0.00 MB (00:00:00) @ 0.00 Mb/s (dvfxhigh1/bi) [audio]
WARNING: Failed to download file segment [0]
WARNING: Response: 400 Bad Request
WARNING: Retrying tv: 'The Repair Shop: 60 Min Versions - 21. Episode 21 (m00084
t3) [original]'

INFO: Downloaded: 0.00 MB (00:00:00) @ 0.00 Mb/s (dvfxhigh1/bi) [audio]
WARNING: Failed to download file segment [0]
WARNING: Response: 400 Bad Request

Hoping that someone can help, thanks

Seems to be working here:
get-iplayer --get 7283
get_iplayer 3.22-ppa33a, Copyright (C) 2008-2010 Phil Lewis
This program comes with ABSOLUTELY NO WARRANTY; for details use --warranty.
This is free software, and you are welcome to redistribute it under certain
conditions; use --conditions for details.


Matches:
7283: The Repair Shop: 60 Min Versions - Episode 21, BBC Two, m00084t3
INFO: 1 matching programmes

WARNING: A UK TV licence is required to access BBC iPlayer TV content legally
INFO: Downloading tv: 'The Repair Shop: 60 Min Versions - 21. Episode 21 (m00084t3) [original]'
WARNING: Unable to determine ffmpeg version - MP4 conversion for hvf downloads may fail
WARNING: ffmpeg 2.5 or higher is required to convert hvf downloads to MP4
WARNING: Use --raw to bypass MP4 conversion and retain .ts file
WARNING: Use --ffmpeg-force to override checks and force MP4 conversion attempt

---

Has the programme moved channels as I see you were looking at BBC1 whereas I was downloading from BBC2?

Thanks for your reply. I'm absolutely not an expert on get_iplayer, but I was under the impression that the PID was the critical identifier of a programme, irrespective of the channel. I will be happy to be corrected.

This has nothing to do with PIDs. Using --get just turns your search criteria into PIDs. Errors like this for one stream out of 36 available, for one programme out of tens of thousands, mean nothing. This is the internet - downloads sometimes fail, upstream resources may not always be available. That's why get_iplayer tries all available streams, subject to your settings. If the stream shown is the only stream attempted, then your settings are very messed up. If that is the case, follow our instructions to provide a proper report so we can see what is happening on your system.