FFmpeg aac_adtstoasc

[Video Dude]

Is the FFmpeg bitstream filter aac_adtstoasc lossless?

I mean does it just change the header or does it re-encode the AAC audio stream?

[nevcairiel]

bitstream filters in ffmpeg never re-encode, they just convert the bitstream to a different format. So yes, its lossless.

[Video Dude]

Thanks, that is what I thought but I just wanted to confirm it.