iTunes thinks dBpoweramp .m4b / .m4a tracks are twice the length

[GiacomoGo]

I have MC13 with the latest R8 .m4a/.m4b codec. When I convert .mp3 audiobook tracks (ripped from CD by dBpa CDRipper 13) to either .m4a/.m4b, and import to my iTunes library, iTunes thinks each track is twice the actual time. Eg, instead of 1min, iTunes tries to

[Spoon]

Re: iTunes thinks dBpoweramp .m4b / .m4a tracks are twice the length

At very low bit rates, AAC HE+ is used, iTunes is not able to read the + part of those files.

[GiacomoGo]

Re: iTunes thinks dBpoweramp .m4b / .m4a tracks are twice the length

At very low bit rates, AAC HE+ is used, iTunes is not able to read the + part of those files.

Thanks, Spoon, but what does that mean for a user like me? Should I force an "encoder profile"? Which one: LC AAC, HE AAC, HE v2 AAC?

I don't see HE+ in that list? What do these profiles mean? What are the trade-offs?

Edit: OR what is the min bit rate (I use 64cbr for spoken word) I can use with the AAC encoder that can actually be read correctly by Apple iTunes?!

Could you please provide a reference or some details so I can make an informed choice? Thanks, again.

[LtData]

Re: iTunes thinks dBpoweramp .m4b / .m4a tracks are twice the length

HE+ is HE v2 I believe. Try forcing the LC profile for your files.
HE and HE v2 are encoder profiles that are designed to give superior quality at low bitrates, but only if the player that is being used supports it.

[GiacomoGo]

Re: iTunes thinks dBpoweramp .m4b / .m4a tracks are twice the length

HE+ is HE v2 I believe. Try forcing the LC profile for your files.
HE and HE v2 are encoder profiles that are designed to give superior quality at low bitrates, but only if the player that is being used supports it.

thanks for that, Lt.
I guess that part that simply makes no sense is why the Apple player (iTunes) can't handle the Apple Audio Codec. Isn't that weird? That simply makes no sense. If Apple can't figure out their own codec, then they should be in another line of work.

Something doesn't add up.

[LtData]

Re: iTunes thinks dBpoweramp .m4b / .m4a tracks are twice the length

It's not "Apple Audio Codec", it's "Advanced Audio Coding" and wasn't made by Apple: http://en.wikipedia.org/wiki/Advanced_Audio_Coding

HE and HEv2/HE+ are additions to AAC and not very widely supported.

[GiacomoGo]

Re: iTunes thinks dBpoweramp .m4b / .m4a tracks are twice the length

It's not "Apple Audio Codec", it's "Advanced Audio Coding" and wasn't made by Apple: http://en.wikipedia.org/wiki/Advanced_Audio_Coding

HE and HEv2/HE+ are additions to AAC and not very widely supported.

NO WAY?! That's the problem, with acronyms -- we get to make up our own definitions. Thanks for cluing me in :o

Of course, I also now recognize that all I had to do was read the Codec help-page (local install folder, only, apparently):
file:///%Local-Install-Folder%/Help/Codec/mp4/Help.htm
:blush::blush:

Forcing the LC profiles sorts this out for me.

[GiacomoGo]

Re: iTunes thinks dBpoweramp .m4b / .m4a tracks are twice the length

Of course, I also now recognize that all I had to do was read the Codec help-page (local install folder, only, apparently):
file:///%Local-Install-Folder%/Help/Codec/mp4/Help.htm
:blush::blush:

PS: it would be nice if the latest help file for aac codec explains the "Create RTP Hint" option (unchecked by default).

[LtData]

Re: iTunes thinks dBpoweramp .m4b / .m4a tracks are twice the length

I'm not seeing that option, you are trying to encode to m4a or AAC? Your first post says your using dMC r13, correct?

[GiacomoGo]

Re: iTunes thinks dBpoweramp .m4b / .m4a tracks are twice the length

I'm not seeing that option, you are trying to encode to m4a or AAC? Your first post says your using dMC r13, correct?

Correct: dMC r13, with the latest release 8 of the m4a/m4b/AAC codec. If I google the phrase "RTP Hint" it seems to do with Quicktime video, which means it's irrelevant for my purposes, so the default off is fine. But it would be nice to know for sure.
Best wishes!

[LtData]

Re: iTunes thinks dBpoweramp .m4b / .m4a tracks are twice the length

It's something to do with streaming the files better in iTunes/Quicktime.