Budge wrote:

[aac @ 0xa62d80] Error decoding AAC frame header.
[aac @ 0xa61800] Estimating duration from bitrate, this may be inaccurate
Input #0, aac, from
'Composer_of_the_Week_-_Carl_Philipp_Emmanuel_Bach_1714-1788_1._The_Belligerent_Flautist.mp3':
   Metadata:
     encoder         : Lavf53.24.2
     artist          : BBC Radio 4
     album           : Composer_of_the_Week - Carl_Ph
     track           : 1
     comment         : Tagged with EasyTAG
     title           : of the Week - Carl Philipp Emm
     date            : 2011
     genre           : Other
   Duration: 01:11:26.78, bitrate: 190 kb/s
     Stream #0:0: Audio: aac (LC), 44100 Hz, stereo, fltp, 190 kb/s
File
'Composer_of_the_Week_-_Carl_Philipp_Emmanuel_Bach_1714-1788_1._The_Belligerent_Flautist.m4a'
already exists. Overwrite ? [y/N] y
[ipod @ 0xa75100] Codec for stream 0 does not use global headers but
container format requires global headers
Output #0, ipod, to
'Composer_of_the_Week_-_Carl_Philipp_Emmanuel_Bach_1714-1788_1._The_Belligerent_Flautist.m4a':
   Metadata:
     genre           : Other
     artist          : BBC Radio 4
     album           : Composer_of_the_Week - Carl_Ph
     track           : 1
     comment         : Tagged with EasyTAG
     title           : of the Week - Carl Philipp Emm
     date            : 2011
     encoder         : Lavf56.40.101
     Stream #0:0: Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, 190 kb/s
Stream mapping:
   Stream #0:0 -> #0:0 (copy)
Press [q] to stop, [?] for help
[ipod @ 0xa75100] Malformed AAC bitstream detected: use the audio
bitstream filter 'aac_adtstoasc' to fix it ('-bsf:a aac_adtstoasc'
option with ffmpeg)

The errors may mess things up, but as the input is identified as aac,
try -c copy with what it says to do above ...

ffmpeg -i input-file -c copy -bsf:a aac_adtstoasc outfile.m4a

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