Seems that the only way to get an aac track out of Kdenlive currently is to render an .mp4 file, then extract it with another tool externally like ffmpeg.

I'd like an option to render straight to m4a/aac as these are supported ffmpeg outputs. That way I don't have to waste time encoding blank frames into a h264 stream in the .mp4, just to discard it after extracting the aac.

there are some "AUDIO ONLY" outputs on rendering dialog. ogg wav ac3 mka no one is what you need?

[edit] ... just added an AAC 128K/192K/384K profileS on the store.. you can add it from the render page pressing on the download button...
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Excellent. Thank you.

i hope the ouput files are on the right format with the right quality.