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Get 24bit audio with AAC
Posted: Fri Jan 18, 2019 3:19 pm
by TRACKER
Im trying to encode my files to 24 bit AAC with Handbrake and the output audio part is still 16 bits. I have selected AAC(avccodec not passthru) bitrate 320, stereo and in 'select behavior' I have put 24 as samplerate bit but wont do, any idea? Thank you
Re: Get 24bit audio with AAC
Posted: Fri Jan 18, 2019 3:22 pm
by rollin_eng
Could you please post your HB logs, instructions can be found here:
https://handbrake.fr/docs/en/latest/hel ... y-log.html
Re: Get 24bit audio with AAC
Posted: Fri Jan 18, 2019 3:29 pm
by Deleted User 11865
There is no such thing as 24-bit AAC. MediaInfo will report a 16-bit depth for all AAC audio, but that number is meaningless.
Re: Get 24bit audio with AAC
Posted: Fri Jan 18, 2019 3:31 pm
by TRACKER
ok and technically or historically why AAC cant have 24 bits? thanks
Re: Get 24bit audio with AAC
Posted: Fri Jan 18, 2019 3:35 pm
by Deleted User 11865
Basically each sample has a different bit depth. This applies to all lossy audio encoding techniques.
Re: Get 24bit audio with AAC
Posted: Fri Jan 18, 2019 3:40 pm
by TRACKER
thanks, great forum!
Re: Get 24bit audio with AAC
Posted: Fri Jan 18, 2019 3:56 pm
by Deleted User 13735
The warhorse standard for video is 48Khz 16 bit stereo This was when 16 bits was 16 bits
BluRay brought us into 21st Century audio, but most internet delivery and some media servers are still 16/48 depending on the codec.
Re: Get 24bit audio with AAC
Posted: Fri Jan 18, 2019 9:55 pm
by Deleted User 11865
Well if you feed 16-bit audio to the encoder, then the maximum actual bit depth of any sample will be 16 bits, of course.
HandBrake feeds 32-bit float to audio encoders, which allows for a maximum of up to 24 bits (integer equivalent) per sample.
Re: Get 24bit audio with AAC
Posted: Sat Jan 19, 2019 12:41 am
by Deleted User 13735
Making preservation of BluRay audio fidelity possible, contingent of course on the codecs.
And if a 32 bit float video environment becomes reality at some point, the sky's the limit
Re: Get 24bit audio with AAC
Posted: Fri Feb 01, 2019 5:06 pm
by JeromeMartinez
Rodeo wrote: ↑Fri Jan 18, 2019 3:29 pmMediaInfo will report a 16-bit depth for all AAC audio
This bug has been fixed years ago, no need to keep saying that in 2019.
Re: Get 24bit audio with AAC
Posted: Fri Feb 01, 2019 5:14 pm
by Deleted User 11865
Well he must be using an outdated version then.