AC3 & TMPGEnc = No Sound

[magisbladius]

I am pretty sure this has been answered before, but, unfortunately, I can not seem to find it at this moment. Whenever I encode an AVI (Video) and WAV (Audio ), which is AC3, the result is an MPEG file without any sound. Is there anyway to fix this?

[lacywest]

I am pretty sure this has been answered before, but, unfortunately, I can not seem to find it at this moment. Whenever I encode an AVI (Video) and WAV (Audio ), which is AC3, the result is an MPEG file without any sound. Is there anyway to fix this?

Well ... right off the bat ... I'm confused ...

wav is a type of audio file

and AC-3 is a type of audio file

So ... is it a wav audio file or a AC-3 audio file ??

Because you are stating this ... this tells me ... your not to savvy in this area.

Perhaps after a few more people read this topic ... you will get a answer.

Is it important to have the audio in the avi video to be AC-3 ... how about mp3 audio instead or one of the other type of audio files.

An MPG video file can use AC-3 for audio or even wav [LPCM]

[magisbladius]

I am not up there with my audio skills as I am UP THERE with my computer skills, meaning audio is not my specialty.

I have this AVI file. GSpot shows it uses an AC3 codec. I convert the audio file to a WAV file using GoldWave and I also save it as the "default" type, which is called something like PCM 16-bit. Then I put the video and audio sources into TMPGEnc, the MPEG file gets created as a result, and then when I play the MPEG file there is no sound. This is the first time I have received no sound (I have done this before with other videos which normally do not originally have AC3).

[ZippyP.]

.

I have this AVI file. GSpot shows it uses an AC3 codec. I convert the audio file to a WAV file using GoldWave and I also save it as the "default" type, which is called something like PCM 16-bit. Then I put the video and audio sources into TMPGEnc, the MPEG file gets created as a result, and then when I play the MPEG file there is no sound. .

That is the method that I use and I've not had any problems. When you enter the avi and wav files into TMPGEnc, make sure you enter the avi into the video box first and the wav file into the audio box second. If you do it the other way around it will default to the audio in the avi which will give you no sound. Double check to make that didn't happen.

[Sakuya]

Have you tried playing the audio file before converting to see if it has sound?

[besk]

Howdy!

Well, I used VirtuaDub to get a Wave-file out of a AVI
that contained a AC3 sound.
I got it!

But when I played using Windows Media Player,
the properties says AC3-filter and know I am not able to
convert the wave-file???

It is still a AC3-file!!!

[mats.hogberg]

Yes, if you select Direct stream copy under Audio, and then Save wav with VirtualDub, you get the audio in whatever shape it was in the AVI (AC3 in your case) with some added WAV headers.
Rename this "wav" back to AC3
Run it thru ac3fix
Convert to wav with headac3he

/Mats

[besk]

Howdy, swedish patriot!

First, thx for your answer.

Well, I have also tried that earlier and VirtualDub CAN´T find
the decompressor!!!

I will later trye your suggestion...

[besk]

Now HeadAC3he v0.23a report the following:
Could not find data chunk!
But rename file to AC3, OK.

Later...It went up to 50% conversion and:
Internal DownMixer activated
Allocating buffer memory...succeeded
Starting I/O thread ...done
AC3 decoding cycle ...done
AC3 decoding cycle ...done
AC3 decoding cycle ...done
AC3 decoding cycle ...done
AC3 decoding cycle ...done
AC3 decoding cycle ...done
AC3 decoding cycle [00:40:40.736] E7: CRC error

Bad Syncword at frame 76275! The AC3 stream is probably corrupt.

Damn VirtualDub

[Hardcoreruss]

Donwlod gordian knot codec pack, install only the ac3 codec. Then do what Mats said above.

[MavDVDR]

I have this AVI file. GSpot shows it uses an AC3 codec. I convert the audio file to a WAV file using GoldWave and I also save it as the "default" type, which is called something like PCM 16-bit. Then I put the video and audio sources into TMPGEnc, the MPEG file gets created as a result, and then when I play the MPEG file there is no sound.

There is no need for this roundabout process. If your avi file already has ac3 audio, there is no need to convert it to wave. In fact it's better to preserve the ac3 audio by simply extracting it with VirtualdubMOD (Demux the stream instead of using the renaming method), then use TMPGEnc to create an ES video only (m2v) file, then combine the m2v and ac3 file in your DVD authoring program. I'm assuming it's a DVD that you're trying to create.

Use this Guide: https://www.videohelp.com/forum/userguides/186739.php

Also, make sure that you have ac 3filter installed.

[besk]

Howdy!

Thx all!

Well, This was the only way, because TMPGEnc did not
liked the AVI-file and there was no sound output.
The audio source file did not showed up.

I am done with this first part of my project
Used TMPGEnc to merge AVI+WAV = MPG
worked silky smooth.
I also burned a test and checked on my standalone
Centrum Gemini 330. One thing I notice was that
CG330 playback differents when using MPG or a
DVD thats Autherized! Aspect ratio was wrong,
but who cares CG330 never playback any
DivX / Xvid correct.

Now I am going to finnish all with DVD-Lab
and also put in the original soundtrack as
a second audio-track.
- Many hours I have spent to get it all, but
thanks to you all I feel I am going to reach the
gooooooooool...

PS. One last question?
Should I use DVD-Lab to merge the AVI+WAV instedd?
I know from earlier project that there where some problem
using the WAV-file from the original soundtrack if the audio-
stream in the MPG is in another form.

Sorry for my bad language, I am swedish, You know!

[MavDVDR]

Well, This was the only way, because TMPGEnc did not liked the AVI-file and there was no sound output.

What I said about demuxing the ac3 track has nothing to do with TMPGEnc ... and it was in relation to magisbladius's original query. For the best results, you should just use TMPGEnc for video encoding. Refer to this useful Guide:
http://dvd-hq.info/Compression.html

PS. One last question?
Should I use Besides, with DVD creationDVD-Lab to merge the AVI+WAV instedd?

If your source footage is good (ie. no bad frames), it is always better to encode video separately as an elementary stream and then add in the audio during the DVD authoring process.

[stk]

just donwload the AC3 Decoder
https://www.videohelp.com/tools?tool=408#comments


and you'll be able to open your video with ac3 sound in TMPGEnc


cheers

-StK

[stk]

ups i mean the AC-3 ACM Decompressor by fccHandler

https://www.videohelp.com/tools?tool=372#comments


this one will do the job


-StK

[MavDVDR]

ups i mean the AC-3 ACM Decompressor by fccHandler

I agree, that's the most trouble free of the ac3 decompressors.

[au7usa]

I use this method also, but you will need to normalize the audio with the "Audio-Edit" function of TMPGEnc or the sound will be too low.

[MavDVDR]

I use this method also.

Which method?

[au7usa]

AC-3 ACM Decompressor

[MavDVDR]

I don't know how a decompressor can be a "method".

The reason I asked is because you said

you will need to normalize the audio with the "Audio-Edit" function of TMPGEnc or the sound will be too low

If you've extracted/preserved the ac3 (for use in the authoring process), there should be no normalising in TMPGEnc

[au7usa]

Personally i was makeing an AVI-disc that could be played in any machine. That requires decoding AC3 and re-encoding to another format.

Aren't we talking about decoding AC3?

[MavDVDR]

The thread has got kind of sidetracked but I thought we were talking about the best way to create/author a DVD when the source avi has ac3 audio.