avconv convert ac3 to aac

[asgard2]

Hi, I want to convert an ac3 (5.1) file to aac. currently I use:

avconv -i file.mp2 -acodec aac -ac 2 -ab 64k -ar 48000 -strict experimental file.aac

How does it work with an ac3 file, should I only change ac to 6 channels?

Regards, asgard

[shantiq]

wow did not know that aac could handle 6 channels but it does


do you not have ffmpeg on your computer?
i ask this as avconv did not accept 6 channels here
but ffmpeg installed this way [and maybe any way]accepts 6 channels from ac3 to aac [using libaac][libfdk_aac also happy but not libaacplus]

ffmpeg -i file.ac3 -ab 448k file.aac

no need to say anything about channels it takes 6 to 6 [5.1] but stipulate audio bitrate -ab mine was 448 so i ask for that to be kept











maybe your version of ffmpeg can do this too; or maybe someone knows how to rig up avconv so it does

[asgard2]

Are you shure that aac can not handle this?

I used these config in StaxRip before, and it works:


I search for something equal, in Ubuntu/Linux.

[shantiq]

sorry asgard revised my post [see above]

[asgard2]

Bei der ffmpeg installation gibt es unerfüllte Abhängigkeiten. (Ubuntu Version 12.04)

sudo apt-get -y install autoconf build-essential checkinstall git libass-dev libfaac-dev \   libgpac-dev libjack-jackd2-dev libmp3lame-dev libopencore-amrnb-dev libopencore-amrwb-dev \   librtmp-dev libsdl1.2-dev libtheora-dev libtool libva-dev libvdpau-dev libvorbis-dev \   libx11-dev libxext-dev libxfixes-dev pkg-config texi2html yasm zlib1g-dev

Die folgenden Pakete haben unerfüllte Abhängigkeiten:
 libass-dev : Hängt ab von: libfontconfig1-dev soll aber nicht installiert werden
 libjack-jackd2-dev : Hängt ab von: libdbus-1-dev soll aber nicht installiert werden
 librtmp-dev : Hängt ab von: libgnutls-dev soll aber nicht installiert werden
 libsdl1.2-dev : Hängt ab von: libglu1-mesa-dev soll aber nicht installiert werden
                 Hängt ab von: libpulse-dev soll aber nicht installiert werden
 libx11-dev : Hängt ab von: libxcb1-dev soll aber nicht installiert werden
E: Probleme können nicht korrigiert werden, Sie haben zurückgehaltene defekte Pakete.

[shantiq]

Die folgenden Pakete haben unerfüllte Abhängigkeiten:
E: Probleme können nicht korrigiert werden, Sie haben zurückgehaltene defekte Pakete.

ok some dependencies not there



to fix that

sudo apt-get -f install

if all this go well start installing ffmpeg again Viel Glück!



ps if you use this ffmpeg version you will be able to do this

ffmpeg -i file.ac3 -acodec libfdk_aac -ab 64k file.aac

using libfdk_aac which is better quality than default libaac

[asgard2]

-f install doesn't fix the dependency problem, it does nothing, something else goes wrong.

On another maschine it is working fine with this compilation guide and

ffmpeg -i file.ac3 -acodec libfdk_aac  -ab 64k file.aac

Thanks

Merry Christmas!

[shantiq]

and Fröhliche Weihnachten to you too

[shantiq]

PS if you want to do many files [BULK conversion]

for f in *.ac3; do ffmpeg -i "$f" -c:a libfdk_aac -b:a 64k "${f%.*ac3}.aac"; done