Posts Tagged ‘aac’

Updated HE-AAC (aacPlus) reference encoder for Mac OS X

Monday, December 7th, 2009

This is an updated build of the 3GPP group AAC Plus (or HE-AAC) reference audio encoder for Mac OS X 10.5 “Leopard” or newer.

You can get the binary build (3 way universal binary with PowerPC, i386 and x86_64 architectures) here:

enhAacPlusEnc for Mac OS X Leopard, Binary build with 3 architectures.

Xcode project (3.2 or newer) can be downloaded here:

enhAacPlusEnc Xcode project (3.2 or newer)

For more info visit the original post here.

HE-AAC Plus encoder for Mac (Universal Binary)

Sunday, September 30th, 2007

This post is outdated, for a more up to date version of both the binary encoder and the sources, please visit this new post.

I needed a native solution to encode HE-AAC Plus audio on a Mac, but there is not any native solution so far right now, so i compiled the reference encoder (enhAacPlusEnc) published by the 3GPP group.
I also created an xCode project to make it easy to manage future builds.
This is an “Universal Binary” build, meaning that it will work on both, Intel based and PowerPC based Macs.

You can download the universal binary encoder by clicking here, and you can download the xcode project by clicking here.

Keep in mind that i had to make some minor modifications in order to make it compile as Universal Binary, so you wil find some minor diferences when comparing with the original source code released by the 3GPP group.

If you have any question, leave a comment here.

Creating good quality h264 video for the upcoming Flash Player and Flash Media Server

Friday, September 28th, 2007

Important

This tutorial has been updated (and improved) a lot, for the new version please follow this link.

UPDATE: I realized that when i read a tutorial about anything, in most cases, i want to first see what result im going to get so then i can decide if the tutorial is worth reading (or not), so here is a head by head comparison: 

This is an h264 file encoded by the guys at apple.com, it’s the TV Commercial for the brand new iMac: ORIGINAL VIDEO

This is the same file re-encoded using the steps on this tutorial: RE-ENCODED VIDEO

Obviouisly, there is an small quality degradation, but keep in mind that apple’s original movie is 14MB in size, while mine is 1.5MB ;).
You can play my MP4 video with almost any video player out there, but remember that not all video players out there support HE-AAC audio (or aacPlus) and b-frames, so if you play the file with a player like QuickTime, it is NOT going to work.
I recommend mPlayer or VLC media player to play this kind of video, and obviously, Flash Player will play the file perfectly too.

Update for Macintosh users:

I updated the bash script on this post so it can be used also by Macintosh users, so instead of using the NERO Digital AAC Encoder, Macintosh users can take advantage of the native 3GPP AAC Plus V2 encoder that i just compiled. Visit this post for more information about it.

Like a lot of people out there, i was really happy when i found the press release from Adobe, stating the addition of h.264 video support and HE-AAC Plus audio to their upcoming Flash Player versions, and also, to the upcoming Flash Media Server.
After following several “Tutorials” all over the web, i found that there was not any single one that gave me the results that i wanted; that is, good video quality, with the less possible file size, so after a lot of trial and error and after a lot of help and optimizations by the guys at the ffmpeg and x264 IRC channels, i decided to create this tutorial that will most probably help you a lot to encode good quality h264 video, with HE-AAC Plus Audio, and all this inside an MP4 container with tags and all ready to deliver to your visitors.

There are several things that you will need in order to do this:

Some friendly bookmarks:
SVN checkout for x264:
svn checkout svn://svn.videolan.org/vlc/trunk vlc-trunk
SVN checkout for ffmpeg:
svn checkout svn://svn.mplayerhq.hu/ffmpeg/trunk ffmpeg

First of all, I’m assuming that you are running Linux, Mac-OS X or any other UNIX variant. I never tried this on windows because I am pretty sure that there are lot of really nice programs that you could buy to do the job.
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