I'm getting the following when downloading certain TV shows...
(This one was for "Justin's House" 4.4 (b080btqn)

[NULL @ 00503300] AVC: nal size 1980764616
[NULL @ 00503300] missing picture in access unit with size 6148
[NULL @ 00503300] AVC: nal size 2038056525
[NULL @ 00503300] missing picture in access unit with size 7064
[NULL @ 00503300] AVC: nal size 696460916
[NULL @ 00503300] missing picture in access unit with size 5124
[NULL @ 00503300] AVC: nal size 1608380405
[NULL @ 00503300] missing picture in access unit with size 23847
[NULL @ 00503300] AVC: nal size 164112639
[NULL @ 00503300] missing picture in access unit with size 5175
[NULL @ 00503300] AVC: nal size -931197073
[NULL @ 00503300] missing picture in access unit with size 6713
[NULL @ 00503300] AVC: nal size -453806761
[NULL @ 00503300] missing picture in access unit with size 5281
[NULL @ 00503300] AVC: nal size -2097241395
[NULL @ 00503300] missing picture in access unit with size 25790
[NULL @ 00503300] AVC: nal size -1204393791
[NULL @ 00503300] missing picture in access unit with size 6415
[NULL @ 00503300] AVC: nal size 809071091
[NULL @ 00503300] missing picture in access unit with size 8872
[NULL @ 00503300] AVC: nal size 2099148423
[NULL @ 00503300] missing picture in access unit with size 6765
[NULL @ 00503300] AVC: nal size -620437996
[NULL @ 00503300] missing picture in access unit with size 28432

Never mind. Seems to be working again now.

... and now it's happening again. This time with Morgan Robinson (b0807v7s).

Follow our instructions to post a full report. Otherwise, we have no idea what you are doing and we can't test your results. All that can be inferred from the above is that you may have a damaged download, which isn't likely to be related to get_iplayer itself, but we have no way of even guessing without a full report.

I can't even replicate it myself. It happens two or three times when downloading certain TV shows, then doesn't do it the fourth time. Might be a problem for the future. As it stands right now, it's stopped happening again.