OT: Help with Broken Downloads Please

[Vangelis forthnet]

On Wed Dec 23 02:36:35 GMT 2015, I wrote: 

> The fatal error
> [aac @ <random string>] Error decoding AAC frame header.
> always shows up in the logs posted there (and here...).

... And I forgot to quote (it's quite late here now!) the following, 
even more serious, error: 

> [NULL <random string>] Error parsing ADTS frame header!
> Failed to open bitstream filter aac_adtstoasc for stream 0 with codec
> copy: Invalid data found when processing input

which appears at:

http://lists.infradead.org/pipermail/get_iplayer/2015-December/008501.html
and 
http://ffmpeg.org/pipermail/ffmpeg-user/2015-December/029739.html

V.