M4A / AAC changes - Which ffmpeg version is required ?

[Martin Williams]

I am finding that the FLV -> AAC -> M4A dual conversion process,
as implemented in the recent "Output AAC as M4A with metadata tags",
is ineffective.

This on an OSX system, FFmpeg version 0.6, iTunes 10.2.1

The resulting M4A file remains unplayable in iTunes, and the audio time
is reported as 789:57:13.

My question is - with which version of ffmpeg will this useful
'trick' work ? It would be good to nail this.

For avoidance of doubt, the commands executed were:

ffmpeg -i test.partial.aac.flv -vn -acodec copy -y test.partial.aac
ffmpeg -i test.partial.aac -vn -acodec copy -absf aac_adtstoasc -y  
test.partial.m4a


Thanks for any pointers.

mw