Skip to main content ↑ ↓

Notice

Please note that most of the software linked on this forum is likely to be safe to use. If you are unsure, feel free to ask in the relevant topics, or send a private message to an administrator or moderator. To help curb the problems of false positives, or in the event that you do find actual malware, you can contribute through the article linked here.
Topic: Quicktime AAC - Clear The Confusion (Read 7358 times) previous topic - next topic
0 Members and 1 Guest are viewing this topic.

Quicktime AAC - Clear The Confusion

I have seen many statements on this and no one seems to agree. So, someone who knows - is Quicktime encoded AAC (the encoder used in iTunes) CBR or ABR at the given bit rate indicated?

Many people claim that Nero's encoder is better because it offers true VBR, but I think we should wait until Roberto's test to test the validity of that statement.

Quicktime AAC - Clear The Confusion

Reply #1 –
to me it seems like it is ABR, since bitrate varies between 180-210 when i've encoded with 192kbps.
myspace.com/borgei - last.fm/user/borgei

Quicktime AAC - Clear The Confusion

Reply #2 –
Quote
is Quicktime encoded AAC (the encoder used in iTunes) CBR or ABR at the given bit rate indicated?

It is CBR. It even faithfully encodes slience at the target bitrate...

Quicktime AAC - Clear The Confusion

Reply #3 –
The first 2 replys disagree. Thus the confusion. My point is made.  I'll go with the AAC developer. I would hope he would know. Roberto, you are the AAC guru. Do you agree?

Quicktime AAC - Clear The Confusion

Reply #4 –
Quote
I'll go with the AAC developer. I would hope he would know. Roberto, you are the AAC guru. Do you agree?

If you knew who skuo is, you wouldn't even ask...  He doesn't want it advertized, but you better listen to him especially regarding Apple AAC issues...
Juha Laaksonheimo

Quicktime AAC - Clear The Confusion

Reply #5 –
Assuming skuo is short for Stanley Kuo, no I wouldn't.

P.S. my dad taught at Rutgers while you were there.  Its a nice school.

Quicktime AAC - Clear The Confusion

Reply #7 –
Quote
Quote
I'll go with the AAC developer. I would hope he would know. Roberto, you are the AAC guru. Do you agree?

If you knew who skuo is, you wouldn't even ask...  He doesn't want it advertized, but you better listen to him especially regarding Apple AAC issues...

JohnV, thanks for the advertisement...
well, this CBR/VBR info is already availabl along with the product release note. I work for Apple so I am more familiar with it and would like to clear the confusion.

Quicktime AAC - Clear The Confusion

Reply #8 –
Skuo, its great to have people like yourself on the boards!

Thank you.

Quicktime AAC - Clear The Confusion

Reply #9 –
Quote
JohnV, thanks for the advertisement...
well, this CBR/VBR info is already availabl along with the product release note. I work for Apple so I am more familiar with it and would like to clear the confusion.

Are there any plans to inplement VBR encoding with the Quicktime/iTunes AAC encoder? Thanks

Quicktime AAC - Clear The Confusion

Reply #10 –
Poor Stanley. At this rate, he'll never return to HA

Quicktime AAC - Clear The Confusion

Reply #11 –
While we're at it can we ask him for HE-AAC support in Quicktime/iTunes also for 32 to 64k bitrates inside .M4A files iTunes creates?

Quicktime AAC - Clear The Confusion

Reply #12 –
Quote
Are there any plans to inplement VBR encoding with the Quicktime/iTunes AAC encoder? Thanks

Your question has already been answered once: "I believe Apple received the request, and it has being evaluated."

Quote
Poor Stanley. At this rate, he'll never return to HA

Yup. (Mac-)users can be very annoying indeed

Quicktime AAC - Clear The Confusion

Reply #13 –
Quote
Poor Stanley. At this rate, he'll never return to HA

if iTunes VBR MP3 finishes last place in your 128 test (and chances are pretty good for that imho), we will know who to blame

Quicktime AAC - Clear The Confusion

Reply #14 –
Hrmmm me thinks we scared him already....  But thats what I call passionate followers.... but we all must learn patience features will be added as users request them and along the lines of software upgrade policy. The more developers here we have the more chances we have for having features that are really needed developed and implemented.

Cheers

AgentMil
-=MusePack... Living Audio Compression=-

Honda - The Power of Dreams
 

Quicktime AAC - Clear The Confusion

Reply #15 –
Whoa, whoa... slow down, folks. surprised to see how this turned up... 

Glad to see that you are interested in Apple products, though.

I wish I could answer all your questions. However, as an Apple engineer, we are not allowed to say anything that has not been released externally for various reasons (and some are good ones, too). Secondly, believe me, I don't know many of those answers either. Even though I may have a answer or plan for now, it may be changed any time before it is officially released. You may notice that some feature was publicized in last year's WWDC, but the plan was changed after the conference and the feature was removed from the official release. so why bother to confuse you and create trouble for Apple?!

However, what I can sure you is that Apple do care and value customers' feedback. The official feedback channel for various Apple products can be found at:
http://www.apple.com/feedback/
somebody does read and process all the submissions.  Of course, questions may not be answered but relevant requests/bugs will be forwarded and handled with care (our group just fixed an AAC codec bug forwarded from the feedback channel yesterday). Features will be evaluated and implemented based on the volume of the request  as well as business priorities.

If you have bugs or artifacts relate to Apple AAC codec, as you submit it to the feedback channel you can also send me a copy. Since it's under my responsibility, I may be able to handle it directly.

Thanks and hope this helps a little bit too...