DivX to VCD sound problems.

**setarip** · 30 Jan 2003, 03:30 AM

"After receiving a DivX from a friend of mine in 2 parts I decided to convert this DivX into MPG in preparation for playing on my DVD player via VCD format. The first part was (after some sodding about) relatively easy.

But the second part has been a complete nightmare.

Playing the original DivX the audio and video are perfect!
Then when trying to TMPGEnc it to MPG VCD format - sync problems."

Your references to "2 parts", "first part", "second part" are unclear. Are you saying that you had "no problem" with the first of the two DivX-compressed .AVIs that you were given and the second DivX-compressed .AVI is problematic, or that you had "no problem" with the "first part" - meaning playing both DivX-compressed .AVIs was "perfect" - and BOTH DivX-compressed .AVIs are problematic regarding audio/video synchronization for use with TMPGEnc?

**golden_eagle** · 30 Jan 2003, 11:42 PM

I have a movie in 2 parts.

Part 1 is complete and the MPG is on VCD perfectly.

The second part I have, has the problem of video/audio synchro.

When trying to convert the audio to WAV the length of the audio changes by a few minutes in the new WAV file because the audio in the AVI has a VBR of 144.2Â±31.2Kbps.

This is the bit I dont get (144.2Â±31.2Kbps)

I understand that the average bitrate is 144.2 and changes either up or down by a max of 31.2Kbps.

How could I convert the audio (from part 2 of the movie) into a CBR stream that keeps the same length as the video and also keeps the file in 'sync' with the video?

**setarip** · 31 Jan 2003, 02:32 AM

Try the following experiment with the "problem file":

Load the file into NanDub
Set BOTH "Video" and "Audio" to 'Direct Stream Copy"
From under the "Video" dropdown menu, select "Framerate"
Select "Change so video and audio durations match"
Save with a new filename
Close NanDub

Simply use VirtualDub to save the audio stream as an Uncompressed PCM (WAV) file as follows:
Load your framerate-changed .AVI into VirtualDub
From the "File" dropdown menu, select "Save WAV" (Enter a new filename with a ".WAV" extender).Click on "OK"
Then set "Video" to "Direct Stream Copying"
Then save the .AVI as a silent .AVI (set "Audio" to "No audio" after you've saved the WAV file).

First load the silent .AVI into TMPGEnc, then load the .WAV file

Let us know of your success ;>}

**techno** · 31 Jan 2003, 10:15 AM

Also, make sure the audio sample rate is 41000Hz and NOT 48000Hz, if so, downsample it using WaveLab or something similar

Check on my site

Techno

**setarip** · 31 Jan 2003, 02:33 PM

To tech-NO

"Also, make sure the audio sample rate is 41000Hz and NOT 48000Hz, if so, downsample it using WaveLab or something similar"

1) It's 44,100Hz NOT 41,000Hz

2) It's FREQUENCY NOT sampling rate

3) This can be done DIRECTLY in TMPGEnc as part of the conversion process - Absolutely NO NEED to use any additional software or waste any additional time!

**techno** · 31 Jan 2003, 08:11 PM

Setarip - Sorry, it was a typing error! and u do know that urself ok, so don't start any flame wars.

2) It can be called either

3) I am only talking from my experience, and I noticed sometimes I fine a/v synch problems or it just does not produce ANY audio what so ever, so please, don't just say that u r the "know it all guy" I don't know anything much either, but at least I try!

**setarip** · 31 Jan 2003, 08:17 PM

To Tech - NO

"2) It can be called either"

No, it can't. The sampling rate would be rates such as 228Kbps

"so please, don't just say that u r the 'know it all guy'I don't know anything much either, but at least I try!"

I didn't say I am a "know it all guy - I said this can be done DIRECTLY in TMPGEnc as part of the conversion process - Absolutely NO NEED to use any additional software or waste any additional time!

You are not HELPING anybody, you're simply adding confusion...

**techno** · 31 Jan 2003, 08:20 PM

Sometimes it is best to use "dedicated" software to convert one thing to another, as u may find SOMETIMES it can produce some problems, as u r aware off and no, I don't think I am making confusion.

I have now unsubscribed to this thread because of ur "smart" comments Setarip, other people and CERTAINLY myself used to look up to u as a "hero" but now, since your attitude has changed, we defently don't now.

This is what happens when you "play hard" with another person, and I am only just giving suggestions, I am not asking for a fight or anything like that.

**golden_eagle** · 1 Feb 2003, 01:01 AM

LOL!

Oooohh! A tantrum! I love it!

Any way.......

I tried what you said in your first piece of advice - Changing Framerate to match. But in the original DivX Rip they already are the same length and no differences were made!

Basically, all I need to know how to do is

A) Convert a VBR MP3 into a CBR MP3.

B) Ensuring that the files length stays the same.

BTW....

VCD creating is the easy part. I can do that.

Syncronising the video and audio is the problem.

The Original DivX AVI is perfect. Using the VBR MP3.
But converting it to a CBR (needed for VCD format) it keeps on ending up longer than the video file by a couple of minutes.

Even if a program existed that 'RECORDS' the MP3 in real time in CBR as it's playing may work.

Any other ideas?

And PLEASE PLEASE PLEASE do not fight! It's a forum where people help each other out of sticky situations and all suggestions from EVERYONE in order to get a result are always welcome!

Peace...........

**setarip** · 1 Feb 2003, 01:21 AM

Sounds like you didn't perform the second part of the procedure I detailed (after using NanDub to change the video framerate to match), to wit:

Simply use VirtualDub to save the audio stream as an Uncompressed PCM (WAV) file as follows:
Load your framerate-changed .AVI into VirtualDub
From the "File" dropdown menu, select "Save WAV" (Enter a new filename with a ".WAV" extender).Click on "OK"
Then set "Video" to "Direct Stream Copying"
Then save the .AVI as a silent .AVI (set "Audio" to "No audio" after you've saved the WAV file).

First load the silent .AVI into TMPGEnc, then load the .WAV file

**golden_eagle** · 4 Feb 2003, 08:19 AM

I did try as you said. But in Nandub - converting the framerate has excactly the same rate in the convert to part!

23.976 rate is original

23.976 is the change to rate!

The Wav file in the AVI is a 144Kb VBR and I have since noticed that the second half has error frames. I tried using DivFix to no avail (the output file is totally wrong!).

This is beginning to prove more hassle than its worth!

HELP HELP HELP PLEASE!

**setarip** · 4 Feb 2003, 12:47 PM

"converting the framerate has excactly the same rate in the convert to part!

23.976 rate is original

23.976 is the change to rate!"

You used the wrong option. The THIRD option in that category states "Change so video and audio durations match" - and DOES NOT indicate a numeric framerate. This is the option to use...

**YoDa2** · 24 Feb 2003, 04:32 AM

Originally posted by setarip
" used the wrong option. The THIRD option in that category states "Change so video and audio durations match" - and DOES NOT indicate a numeric framerate. This is the option to use...

And what if i can't check that option? It is grey in my VirtualDub. I am using 1.5.1.

DivX to VCD sound problems.

DivX to VCD sound problems.

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