Audio out of synch using convertx to dvd.

[trueman]

Its appearing as a pop up dialogue.

Another avi I tried brought up the dialogue box that said "error decompressing video frame 2. Yet I scanned this one for errors and it had none.

[trueman]

I can play these avi files fine in media player just not in vdubmod.

[nednedned]

for repairing fixed audio sync in a dvd movie.


programmes needed=pgcdemux-headac3he-virtualdub-ac3machine-muxman



1. loadup pgcdemux.select the first vts file in your VIDEO_TS folder.pgc selection option.
pick titles.click all demux options. run the movie through pgcdemux-
after this you will some files.but the main ones you need.are the .m2v and .ac3 file.
2. loadup headac3he-0.23a.load in your .ac3 file.convert it to .wav.program set by default.
3. load up virtualdub.load in your .m2v file.in the aduio tab in virtualdub pick
wav audio.select the wav file created by headac3he-0.23a.go back
into audio options again.select interleaving.and adjust delay audio track.
until the audio is in sync.note this figure.there are two screens when playing
a video file.left is input screen.right is ouput screen.drag over the right screen.
there are two play buttons.use the zero play button.hit stop.adjust audio.then hit
play to see if its ok.
4. loadup ac3machine.make sure to point ac3machine to besweet.usually its in the ac3machine
folder.put in your .ac3 file.set ac3 encoding options
bitrate to 192.insert the audio delay.the one you got in virtualdub.
if its positive dont use a + sign.give new .ac3 a different name.if correct you get ados box.
first showing the gain.then transcoding.
5. load up muxman.use the .m2v and the new .ac3 file.use select all files.as muxman doesnt show .ac3
by default.you dont need to adjust the settings .muxman will create a new VIDEO_TS folder .do a check with your pc dvd player
software.

[trueman]

Thanks for that nednedned but is there anyway I can fix an avi file before its converted to vobs?

[trueman]

I cant seem to get that ac3 machine anywhere. The download links I find take me to a proram callled Besweet.

[trueman]

Well Im still stuck if your still around Gunslinger. Whilst I appreciate the advice from nednedned I have to install all the programs he suggested and cat find one of them anyway.
I would like to get this audio right in the avi file if possible.

So do you have any suggestions as to why I am getting these errors in vdubmod? It seems to play my own avi files no worrys just wont play any that Ive downloaded from the net.

[trueman]

For what its worth when I open the same avi in virtualdub and try to play it I get the following error message.
"ACM reported error on audio decompress"
if thats a clue.

[guns1inger]

g-spot the file. What does it say about the audio ?

I suspect something is screwy regarding your codecs, but uncompressed audio should pose no problems. This makes me wonder in you have saved it as uncompressed. Let's see what g-spot says.

[trueman]

G spot says the audio is 0x0055(MP3) ID'd as MPEG-1 Layer 3

and 4 compatible codecs installed.

ffdshow audio encoder
Fraunhofer IIS Mpeg layer 3 Codec
MPEG layer 3 decoder
Nero digital audio Decoder.

Fors ome reason gpsot wont export the file settings to a text file otherwise I would have pasted that info here.

[trueman]

Oh and bitrate is 151 kb/s (75/ch, stereo) VBR fs 48000 hz.

[trueman]

Ned,

I followed your guide and tried to fix my audio synch in my video files. However Im having problems adjusting the audio skew correction in vdubmod. I just seem to get it in synch with the video but then if I play more of the movie it seems to be out again. At one stage I had set a value of -20500 and the audio was spot on. However when I stopped the movie and started it again from the start the audio was ahead of the video by a fair amount.
What am I doing wrong?

[guns1inger]

Is this the avi that is supposed to have uncompressed pcm audio ?
If so, this is where the problem lies, because you still have VBR MP3 audio in the file.

Start a fresh with exporting the audio as uncompressed wav. Make sure you can play it in media player, and use g-spot to confirm that this is PCM audio. If it is, replace the VBR audio in the avi with this wav audio. Again, use g-spot to confirm that you have changed the audio.

[trueman]

well desite getting all sorts of results with the audio delay I decided to get it in synch at one part of the movie and move on.
Im up to the part where you use The ac3machine. However when I click on "Give me AC3" a command window flashes up for a split second and then nothing esle happens. Ive got ac3machine pointing to besweet.exe but still no luck.

Any suggestions?

[trueman]

Okay sorry I still have that other avi as well. Thats the one where I converted it to avi first then put it back into the file.

Neither that avi or the original avi would play in vdubmod. But teh gpsot specs ofr the other one is..
PCM Audio
bitrate 1536 kb/s (768/ch, stereo) fs 48000 hz.

But when I try to play it in vdubmod I get the same error message as with the original avi.

[guns1inger]

If you play the second avi (with pcm audio) in VLC, does it play, and is it in sync ?

[trueman]

I dont have vlc only wmp and divx player. But NO it does not play in synch in wmp. The audio is in front of the video by about 2 seconds.

[guns1inger]

Virtualdubmod is the easiest place to fix this, once you solve the problem with reading the file. It appears to be a codec problem. g-spot says you have codecs to read the files, however not all of these are suitable for virtualdub (ffdshow, for instance, is a directshow filter and cant be used by vdub).

The best answers I can find indicate that perhaps the original audio was/is corrupt somehow.

What is you load the original avi file into vdubmod, and just demux the audio. This should give you a wav wrapper containing the mp3 audio (might even just give you an mp3 file). You can try loading this into an audio editor such as audacity to see if it can be read in isolation.

[trueman]

I demuxed the file and it created a mp3 file which plays in wmp no problems. What next?

[guns1inger]

WMP is not a good recommendation for anything, frankly. Try to load it into an audio editor and convert it to a wav file that way. Then see if you can use this to replace the audio in vdubmod.

[trueman]

Okay I have audacity somewhere so will try that. Hey Just realised your in Aust too, you wouldnt be in WA would you?

[trueman]

Well I dont think that was very succesful at all. I opened the mp3 file in audacity and converted it to a wav file.

I then went into vdubmod and opened the original avi file. I added the wav file created in audacity and deleted the original audio. I then selected direct stream copy chose save as and saved it to a folder and then it did its converison thing.

Now I can hear it in vdubmod but am unable to see the video, which is strange as every other avi file Ive created has been fine and played no worries in vdubmod.

[trueman]

Okay I dont know if this is the right way to do it but I thought I would give it a try anyway. I loaded the .m2v file that I created with pgcdemux into vdubmod. I then added the wav file that I had also created and then adjusted the audio skew until the audio was in synch. Then I saved it as an avi and am waiting for it to finish so I can test it out.

[trueman]

The .m2v method was no goodas the file would have been huge so I aborted it. However I did convert the original file to divx using divx convert and then stripped the audio and put the wav file in, got the synch right and it plays in vdubmod no problems. I now just have to run it through convertx to dvd and see if the audio stays in synch this time.

Thanks once again for all the help.

[DarrellS]

You need to start all over from the very beginning, using the original AVI file with VBR audio.

Make a new folder where you can put the new files that you create.

Use Virtualdub, not VirtualdubMod since the program seems to be too confusing to you.
IMO, the only reason that anyone would use VirtualdubMod is to frameserve and you don't need to frameserve this file.

Open the VBR AVI in Virtualdub > Select Audio > Full Processing Mode > No Compression > Select File > Save Wav > Choose the folder that you created and save the file to this folder.

With The file still open in VDub > Select Audio > No Audio > Select Video > Direct Stream Copy > Select File > Save AVI and save to the folder you created. (note the length of the AVI and open your Wave file in GOLDWAVE and warp the file if needed)

Open the new AVI file that you just created with no audio > Choose Audio > WAV audio > choose the wave file that you created > Select Full Processing Mode > Compression and choose the MP3 compression of choice.
DO NOT CHOOSE LAME MP3 VBR!!!!!!!!!!

Select Video > Direct Stream Copy and save the new hopefully fixed AVI.

[Abond]

Well, I also would try to suggest something
Load the original avi (with mp3 VBR sound) in ffmpeggui and convert to ac3. It will process only audio.
Using already known procedure replace the mp3 with ac3 in the avi.with VDMod.
Alternative (require an additional step) is to replace the sound in the vobs outputed from ConvertxtoDVD with the ac3 produced from ffmpeggui.
Wait, I think you have some delay already in the original avi. That is why the wav was out of synch. Load the original avi in gspot to look for the delay or post here a screenshot of the gspot analysis.