Making an FLV video with audio track only

[BladePoint]

Hey again, sorry about my previous thread asking how to make an MP4 video with audio only. It turns out if I'm going to embed this thing in Flash, it has to be in FLV format. :/ So can you guys recommend the tools for the job? I need to make an FLV video with no video track and just an AAC audio track. I don't want the AAC audio to be re-encoded in the process. Any more help would be appreciated, thanks.

[poisondeathray]

you can do it with ffmpeg

if you're starting with mp4
ffmpeg -i input.mp4 -vn -acodec copy output.flv

if you're starting with aac
ffmpeg -i audio.aac -vn -acodec copy -bsf:a aac_adtstoasc output.flv

[BladePoint]

Thanks! I think I'm all set now!