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Hydrogenaudio Forums > Lossy Audio Compression > AAC > AAC - Tech

DARcode

Feb 19 2005, 09:00

Is there a way to make Mr QuestionMan support AAC files in MP4 containers?

Also, how come it reports all HE files (encoded with Nero) as LC ones?

EDIT: grammar

DARcode

Mar 3 2005, 03:08

QUOTE(DARcode @ Feb 19 2005, 05:00 PM)

Is there a way to make Mr QuestionMan support AAC files in MP4 containers?

Also, how come it reports all HE files (encoded with Nero) as LC ones?

EDIT: grammar

Anyone can gimme a hand with this please? Thank you.

Gambit

Mar 3 2005, 06:36

There is no way to tell from the header if an .aac file is HE. You have to decode one frame to find out and that's not possible from MrQ.

And .mp4 support will be there when somebody codes it.

DARcode

Mar 4 2005, 02:58

QUOTE(Gambit @ Mar 3 2005, 02:36 PM)

There is no way to tell from the header if an .aac file is HE. You have to decode one frame to find out and that's not possible from MrQ.[...]

Then can you please suggest another prog/tool which can let me tell HE and LC AAC files apart please?

rc55

Mar 4 2005, 03:36

Perhaps foobar2000 with some title formatting? I can't be certain this can do it, but it's worth investigating.

DARcode

Mar 4 2005, 03:53

QUOTE(rc55 @ Mar 4 2005, 11:36 AM)

Perhaps foobar2000 with some title formatting? I can't be certain this can do it, but it's worth investigating.

Pardon my noobness, but what do you mean by "title formatting" exactly?

Also, what about Gambit's hint:

QUOTE(Gambit @ Mar 3 2005, 02:36 PM)

[...]You have to decode one frame to find out[...]

Any software player already does that and can be used to tell HE and LC files apart?

kindofblue

Mar 4 2005, 04:03

QUOTE(DARcode @ Mar 4 2005, 01:53 AM)

QUOTE(rc55 @ Mar 4 2005, 11:36 AM)

Perhaps foobar2000 with some title formatting? I can't be certain this can do it, but it's worth investigating.

Pardon my noobness, but what do you mean by "title formatting" exactly?

Also, what about Gambit's hint:

QUOTE(Gambit @ Mar 3 2005, 02:36 PM)

[...]You have to decode one frame to find out[...]

Any software player already does that and can be used to tell HE and LC files apart?

In my foobar ui columns config, I have added a column showing the '%__aac_profile%' tag. I truncate the string to show only the first two letters (HE or LC).

CODE

$if(%__aac_profile%,$left(%__aac_profile%,2),'···')

There's also %__mpc_profile% for musepack files btw.

Cheers
kindofblue

DARcode

Mar 8 2005, 14:12

Got it: MP4box with the "-info" switch!

For HE files it outputs: MPEG-4 Audio AAC LC - 2 Channels - SampleRate 22050 - SBR SampleRate 44100
For LC ones: MPEG-4 Audio AAC LC - 2 Channels - SampleRate 44100 [no SBR info!

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