Nero audio problem

[datascab]

I'm using recode 2 (2.3.0.8) to make movies for my play yan micro.

I've been trying to get around the low volume problem.

I tried the reg hack, no joy.

I've successfully extracted the aac, replay gained it with foobar, made a wav file and converted this to aac again.

The problem is, no matter what muxing process i've tried, the audio is never quite as in sync as the original recode version.

I've tried YAMB, elecard muxpro and graphedit with recode and 3ivx filters.

It seems i can preserve the exact length of the audio track until i mux it. The mux'd audio track is always slightly shorter or longer and hence slightly out of sync.

Is there a resolve for this?

I was hoping to use recode filters in graphedit, but it appears they've locked the video one (yes i've renamed graphedit to recode.exe).

Thanks

Neil

[bond]

wav -> aac -> gain -> wav -> aac?

this doesnt make sense and means a big quality loss...

why not simply apply the gain to the wav prior to aac encoding? afaik this has been discussed already :search:

[shon3i]

You losse sync because you extract to aac (mp4box somehow put few seconds in final audio), try to extract in new mp4 file, and than do ReplayGain, my recomendation to use last foobar 0.92

mp4(movie)->Yamb mp4(audio)->foobar(RG)->mp4(new redy to mux)

but like bond says maybe in this process you can get big quality loss

btw, why not use DGIndex to demux original AC3 from DVD movie and than use foobar to process it

[datascab]

Not sure i made myself clear.

1. Encode movie using recode. I deliberately get recode to produce 448kb 48khz LC-Aac because of the audio processing that follows.

2. Open *.mp4 movie in foobar, replay gain it (+10dB usually required).

3. Run conversion (single *.wav o/p). This gives me a gained wav file which is ready for encoding.

4. Encode with nero burning rom he-aac.

Now at this point the length of the audio file is exactly as it used to be.

Now i mux, tried several methods, yamb, directshow, elecard and the audio is always out (21ms shorter audio track is common).

If i extract the audio with YAMB the aac is shorter from the outset.

I've already tried demux the ac3, processing it and making the aac and remuxing it and the audio is still off.

I dont know what else to try now

Thanks for the replies

Neil

Oh and i put it in the forum i did because this is not an audio encoding issue, its a remux into mp4 problem.

[shon3i]

Try this:

1. Encode movie with recode

2. Extract Audio with yamb to new MP4

3. Do Replay Gain in foobar

4. Encode dirtect to new mp4 using Nero encoder

5. Mux audio and video with yamb

if you find that delay 21ms then you can apply this delay in Yamb or use BeHappy to re-encode audio but with Delay

Aslo did this ac3 in filename have some -delay XX ms or something.