5.1 AAC Creation

[doomgaze3]

So, I've been working on synching up one of my movie rips with a Rifftrax. If you haven't heard of a Rifftrax, enlighten yourself www.rifftrax.com.

Anyways, I managed to extract the AC3 file, convert it to a multitrack WAV with MediaCoder and opened it in Audacity. Then I mixed my Rifftrax with the center channel and exported the whole mess to 6 wav files. Now, I'd like to reencode the whole mess to an MP4 compliant file. To do that, I need to make an AAC file and then mux it with my encoded MP4 video file. But I can't seem to find a suitable tool that will take my 6 WAV files and turn them into a 5.1 AAC file.

Does anyone have any tips for me?

[minidv2dvd]

megui might, but the source may have too be a single 6 channel wav, or be encoded back to ac-3 6ch first.

[poisondeathray]

Megui , eac3to, and behappy will all do it from a single 6-ch wav or ac3, you can download neroaacenc.exe free separately from the nero site

To merge 6 mono wavs, you can use avisynth and feed it into megui or behappy

fl = WavSource("X:\Path\Test_FL.wav")
fr = WavSource("X:\Path\Test_FR.wav")
fc = WavSource("X:\Path\Test_C.wav")
lf = WavSource("X:\Path\Test_LFE.wav")
sl = WavSource("X:\Path\Test_SL.wav")
sr = WavSource("X:\Path\Test_SR.wav")
MergeChannels(fl, fr, fc, lf, sl, sr)

[gadgetguy]

Use the latest Audacity (1.3.7) with the ffmpeg library and export it as AAC.

[herbapou]

I am converting my DVD's to mkv to be played on my laptop that connects to my TV

I am using HandBrake which have the ability to encode ACC 6 channels discrete. I am wondering if I should do that or just transfert the AC3 audio tracks.

Is it possbile to play AAC 6 channels discrete audio with a PC surround sound system? I know I cant feed it to external home theater systems but if Its playable on a PC I might choose AAC 6 ch for the spaces it saves

[minidv2dvd]

I am converting my DVD's to mkv to be played on my laptop that connects to my TV

I am using HandBrake which have the ability to encode ACC 6 channels discrete. I am wondering if I should do that or just transfert the AC3 audio tracks.

Is it possbile to play AAC 6 channels discrete audio with a PC surround sound system? I know I cant feed it to external home theater systems but if Its playable on a PC I might choose AAC 6 ch for the spaces it saves

why re-encode the ac3? it's already compressed lossy audio. any more compression is just lost quality and not much saved space if you keep it 5.1.

[guns1inger]

And the MP4 container now supports AC3 audio.

[Midzuki]

[ i g n o r e ]

[herbapou]

I am keeping the AC3 audio. I have started massive conversion of DVD's to h264/ac3/mkv. Working well and the encode is about of same quality for 1/3 the spaces.

I wanted to save some space has 448 kbps AC3 gives same quality 384 kbps AAC. But you cant send AAC directly to a home theater system so its not worth the trouble.