.AC3 Nightmare

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.AC3 Nightmare

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burb

Newbie

18. July 2004 @ 04:41

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Please, please help me! I have been sat at my PC for hours now, trying various methods of getting audio to work on a .avi movie I have converted to DVD-r. I have searched every post on this site and others, but still im at a brick wall.

Firstly the movie was 2 files, so using the walkthroughs on this site I now have one file. I ran that file through the following programs to determine what the audio codec was. ? Here are the results.

AVICODEC

Audio : 282 MB, 448 Kbps, 48000 Hz, 5 channels, 0x2000 = AC3 DVM, SUPPORTED!

GSPOT

CODEC NOT INSTALLED - ac3 (0x2000) "Dolby Laboratories, Inc"

Ok so straight away there is a conflict.

(The movie plays fine on my PC)

Anyway, I extract the .ac3 from the .avi using VirtualDub Mod. This is what VDM recogonsises the file as;

Desc : AVI audio stream 1 [tag 0x2000,ATSC/A-52 (Dolby AC3)

So I demux the file, and am left with a 282mb .ac3 file! Perfect. However, when I try to Author the DVD using IFOEDIT the sound doesn?t appear on the video. So from following more guides I was pointed in the direction of TMPGenc Author.

Here is what TMPGenc Author says when I try and load the created .ac3 file.

?Illegal audio format

You can only use the following, Dolby Digital (AC-3), MPEF-1 Audio Layer-2, or Linear PCM.?

This has been confusing me for a long, long time! ? Please can you guide me?

Thanks.

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This message has been edited since posting. Last time this message was edited on 18. July 2004 @ 04:44

carefree

Member

18. July 2004 @ 09:08

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Use this prog to fix the ac3 file u demuxed with virtualdub mod then dvdauthor should reconise it after you have fixed it.it.http://www.afterdawn.com/software/audio_software/audio_tools/besplit.cfm

also make sure u have correct codecs installed if u dont this 1 here will do .http://www.afterdawn.com/software/video_software/codecs_and_filters/ac3filter.cfm
_

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This message has been edited since posting. Last time this message was edited on 18. July 2004 @ 09:32

burb

Newbie

19. July 2004 @ 05:02

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Thanks! That worked a treat.

:)

How long did it take you to negotiate around the different error's each film has?

Its driving me MAD!!

[ + quote]

carefree

Member

19. July 2004 @ 14:59

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np mate...what errors u mean?...the 1 with fixxing AC3 sound,that should take u few mins to get round the prob.

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burb

Newbie

19. July 2004 @ 22:49

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Well i've very nearly given up on this encoding!

Now my lates problem is 'write errors' which appear at 100% of the encode. And a lack of sound on these files......

"Audio : 149 MB, 191 Kbps, 48000 Hz, 2 channels, 0x55 = MPEG Layer-3, Supported"

I have 3 films which worked fine using the standard TMPGEnc tutorial, without extracting the audio. But the latest files I have been trying to convert have no sound!

So I have tried, converting the mp3 into .wav and authoring it, running the file into decompressor.exe (so it creates a PCM file), but this seems to crash my pc and im also not to sure what settings to put TMPGen on (ie. PCM or MPG-2 )!

Is there a way of getting the audio to work without running a whole 15 hours process again? I can still extract the sounds from the original .AVI but im not to sure on how to author it correctly - just loading the .wav creates all kinds of funny white noise problems!!

Its drving me mad!

Thanks for all your help, and one day im sure i will be able to create a dvd-r without all this trouble!

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carefree

Member

20. July 2004 @ 05:08

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hold on man ....are we still talking bout the AVI with AC3 sound or did that work fine?

load your AVI into GSpot and look at audio and see what type it is ...if it aint AC3 no need to Demux it just load file into TMPGEnc and choose system(Video+audio) from stream type the your setting from load dvd(ntsc)or (pal) whatever u are ....then let TMPGEnc do the video and audio for u.

also when u checking it with GSpot look at codec part in adio and make sure u have correct codecs installed.

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burb

Newbie

20. July 2004 @ 05:23

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Nope the .AC3 fix worked a treat.

The problem I am having now is with files with the standard codec

""Audio : 149 MB, 191 Kbps, 48000 Hz, 2 channels, 0x55 = MPEG Layer-3, Supported"

I have tried using just TMPGEnc, and I have had success on a few files, but others come out with no sound!

[ + quote]

carefree

Member

20. July 2004 @ 15:29

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ah no sound normally means correct codecs arnt installed does gspot say u have nesary codecs for that file ??...or make sure u have system(video+audio) checked.

have a look at this thread u may find your fix in it http://forums.afterdawn.com/thread_view.cfm/40101 it has lots of probs with tmpgenc and fixes in there.

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This message has been edited since posting. Last time this message was edited on 20. July 2004 @ 15:29

burb

Newbie

21. July 2004 @ 04:59

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Yep I've searched through that thread a few times, i've sorted the problem now though. I just decompress the .AVI using decompressor.exe (availble with avi2svcd) - This converts the audio to PCM, I then just burn the disc in PCM mode.

I will look at removing all my codecs and installing them again, g-spot says I have all the correct codecs installed - its just a few films refuse to give me sound output.

thanks for your help.

[ + quote]

carefree

Member

21. July 2004 @ 11:36

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np mate your welcome......iv u have a codec pack installed yeah i would recomend removing them(they cus more probs than they solve it seems)....i just use xvid codec,divx,AC3 filter and im alble to play all files iv come across.

good luck.

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afterdawn.com > forums > archived forums > mpeg-1 and mpeg-2 encoding (avi to dvd) > .ac3 nightmare


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