Problem with audio and video

DJchris wrote on 11/13/2003, 4:05 PM

hi i am working on a school project and using vegas video 4, we are having some problems that me or my teacher can't fix, and these problems also happened in vegas video 3

Problems
The sound file is not lined up to the video
The sound file wave display shows no sound at the end but it's their (usually not lined up)
Vegas says that the audio is 12 bit 32,000 hz but it's 16bit, 44,100 hz
Soundforge says it's missing a audio codec while trying to open the video files but it will open some but not all(these files are the same type)

that's about all
these were captured from a digital camcorder, captured using a bridge and the camera is outputting analog, recorded to .avi, sent to our computers via network

this is a windows nt system using IBM computers with 128, 256 or 512 meg or pc133 ram, 800mhz p3 processor, intergrated sound and video. Computers have no internet ascess so virus is out of question.

Please help i need to finish project

Comments

Chienworks wrote on 11/13/2003, 4:30 PM

When you say "bridge", what device are you talking about? There are several analog to DV devices that are really lousy.

You mention that this is a digital camcorder. Is there any reason you didn't capture direct digital through firewire? The conversion to analog and then back to digital is probably the source of some of the problem.

kameronj wrote on 11/13/2003, 4:30 PM

Never...under any circumstance rule out virus - connected to the internet or not.

Now that we got that out of the way....you pretty much answered your own question. Well some of it anyway.

SoundForge is telling you it is missing some audio codecs.

So....get the codecs.

Put a different way - when that red light near your "E" on your gas tank thingie goes on and it says you are running low on fuel....go get some fuel.

As for the other issues:

The sound file is not lined up to the video: Line them up.

The sound file wave display show no sound at the end, but it is there (usually not lined up). Zoom in...and line them up.

Vegas say that audio is 12, 32,00 hz - but it's 16bit 44,100 hz. Says who? Who is saying it is 16 bit 44,100 hz? Surely it isn't Vegas saying it. So maybe we have a failure to communicate. Or who ever is telling you it is 16 bit is lying to you (for what reasons I can't even begin to guess....maybe it wants all of your audio all to itself...hmmm??? didcha think of that as a possibility? Or maybe it is just bored and wants to have a little fun with you!!

But I digress. Sorry.

Double check (in another audio application, like WMP) and see what the file is coming up as. If Soundforge is saying it is missing some codecs...chances are those same codecs are screwed up for Vegas.

Maybe uninstall/reinstall the application.

Lastly - if you mean windows NT 4.0 (and not Windows 2000)....get away from NT4.0 and move to 2000!!! (that's just me talkin!!)

Hope that helps.

DJchris wrote on 11/13/2003, 4:44 PM

ok you can not simply line them up or they crash stop loading ect.
the sound and video are fine in wmp
we have ruled out virus because this is a very secure network with millions of dollars spent on it and it runs through the whole city (this networks is like 50km by 50km and cables running all over :)

and wmp and properties says it's 44.1 16 bits

jbrawn wrote on 11/14/2003, 7:23 PM

What format is the video? Is it DV (.avi), MPEG1 or 2 (.mpg, .mp2). Is the audio PCM? Exactly what devices formed the chain between the camcorder and the PC? Was there an analog to digital conversion somewhere in the chain? If so what device did the conversion, and how was it configured?

Please give us more detailed information so we can try to help with the problem.

Best Regards,

John.

TheHappyFriar wrote on 11/14/2003, 8:59 PM

And you can't rule out a virus: At my old highschool they had a "secure" network. No internet acces on any computer on the network. Ends up someone took a disk with some work on it home abrough back the monkey virus. Pain in the but to get rid of.

It doesn't sound like a virus though.

What program did you use to capture the video? Vidcap? another program? That might shed some light on it. if it takes a while to re-load/update waveform patterns in Vegas, you have a highly compressed audio/video file. I used DV AVI's on a p3-667 and vegas didn't miss abeat with adjusting the audio, but any mpeg or WMV file slowed the system down to a crawl.

The "adjusting" of your audio will be your capture program too. I use iuVCR for captuing my footage (I use an old analog capture card). iuVCR will automaticly figure out the "lag" between the audio and video and keep them in sync (or at the least have the start of the video sync up with the start of the audio).

If you audio is 44.1 then it's not DV, which also suggest it's a wierd format. When you open it up in WMP does it say it's downloading a codec? Sometimes on my comp WMP says it can't find a codec but plays the file prefectly.

Also, if these clips were captured on a special capture card (like a Matrox) there may be codec's you need. They normaly have special codec's that are built into their hardware.