no audio

Chienworks wrote on 7/16/2009, 6:14 PM

What kind of file? Where type is it? What codec does it use? Where did it come from? How did you get it into your computer?

Do you see an audio track when you import it into Vegas? Does that audio track show a wave form? When you play to the meters go up and down? Do you have the audio track muted? Do you have the preview volume turned up?

Do you hear sound when you play other files or use other software?

musicvid10 wrote on 7/17/2009, 8:29 AM

This thread will help you to find out the information chienworks asked you for.

ralph20 wrote on 7/17/2009, 8:59 AM

Hi, Thanks for taking your time helping me.
The File I am using is a movie clip (MPG).
When I play the File in my computer not using the Vegas Program the video and the audio are perfect.
When I bring the file into the Proyect Media Window and I try to play the File to see it in The Preview Window only I see the Video and no audio, also the meters do not go up and down.
When I drag the file from the Proyect window to the Timeline area using the right button of the mouse I notice that the area in the little window that opens and that says Audio Only is not Highlight, also I noticed that thereis a _ under the vowel u , (of Audio).
Again in advance, thank you for your help.

ralph20 wrote on 7/17/2009, 9:11 AM

Hi, I been using this progran a week ago.
At the begining When I placed a File (MPG) in the proyect media window and play to see in the preview window I could see the video and here the audio.
Also when I placed in the timelime and played it I could see it in the preview window.
I do not know what I did wrong that I can not duplicated again.
Thanks again for you help.
Ralph20.

musicvid10 wrote on 7/17/2009, 9:11 AM

If you would be so kind as to provide the video and audio codecs used to create the file, as has been mentioned twice now, it would certainly be a big help.

However, one common cause of missing audio in .mpg files that use the MPEG-2 video codec and the AAC/AC3 audio codec can be quickly solved by renaming the file extension from .mpg to .vob

This was clearly pointed out in the thread I provided.

If this does not work for you, please download the free MediaInfo utility and kindly provide us with the necessary details, including the video and audio codecs used!!

ralph20 wrote on 7/17/2009, 3:28 PM

Hi, I am not an expert in this matters, I am trying to understant your questions.
First I will tell you that I placed differents files (MPG) many times in the Proyect window and in the Timeline window and I played them to see in the Preview window and they work perfect. The Files are from records made with a Sony Handycam Model DCR-CVD650. I recorded the Files in a memory card and then I downloded into my Computer. I do not know how to get the codes of video and audio of those files. I know that I move something in the Computer and then this happens. I uninstalled the program and then I installed it again, but no audio when I use the Vegas Program.

musicvid10 wrote on 7/17/2009, 9:24 PM

All I can suggest is that you read the post I linked above, and try to provide as much information about your files as you can.

If my suggestions are not helpful, perhaps someone else will be able to help.

ralph20 wrote on 7/18/2009, 6:56 PM

Thanks in advance.
These are the File properties:
.MPG
Type: MainConcept MPEG-2
Size: 61.73 MB (63,209,472 bytes)
Attributes: Archive
Streams
Video: 00:01:13,573, 29.970fps interlaced,720x480x32,MPEG-2
Acid Information
Acid chunk; no
Stretch chunk; no
Stretch list; no

I hope that information helps, I tried to changed the name .MPG for .vob but I could not do it. If you can tell me I will appreciate it.
I used that file many times when I started to use the Vegas program and many times I could see the video and hear the audio in the Preview Window.
Thanks again.Ralph20

musicvid10 wrote on 7/18/2009, 9:12 PM

Well, I'm glad we got this far.
The file information you gave has solved the mystery.
There is no audio track in your video file.
That means it was rendered without audio.
To fix this, you will need to re-render the files, and make sure the "Include Audio" box is checked. You can find directions for all the settings in the Vegas Help files.

Also, when you capture video from your camcorder, make sure that "Capture Audio" is checked.

Thanks for figuring out how to provide the necessary information.
I've updated the thread to include your situation.

ralph20 wrote on 7/19/2009, 2:58 PM

In advance,thanks for the help.
Still I do not undertand that there is no audio track in the video file, because
when I play the file in the computer using the Windows Program that comes with the computer I can see the video and hear the audio, but when I use the same file in the Vegas program I can see the video but no audio in the Preview Window.
I will like to undertand that, thanks for the help. Ralph20.

musicvid10 wrote on 7/19/2009, 4:26 PM

OK, then it is because the Media Properties in Vegas did not find the Audio Codec used, possibly because it is not available in Vegas.

One more time:
1) Downoad and install MediaInfo.
2)Report back the full information MediaInfo reports for your files.

Also, you may upload a short sample of the files you are working with somewhere, so we can take a look at them.

musicvid10 wrote on 7/19/2009, 5:41 PM

I'm still going on the possibility that your files may have AAC/AC-3 audio.

Did you have DVD Architect installed on your computer at one time? Did you uninstall it?

ralph20 wrote on 7/19/2009, 7:11 PM

Thanks again.
Yes I Have DVD Architect installed on my computer. I uninstalled Vegas 9 only, and then I installed again.
At the beginnig when I started using Vegas 9, I used the same files I been using. At the beginnig I could see the video and hear the audio in the Preview Window, now only I could see the video.
Now, if I bring one of the files that I been using to the Timeline and then I bring a file of music to the timeline, then using the play button in the Timeline I could see the video of the first file and also I can hear the music of the second file in the Preview Window, but not the audio of the file that has the video, I hope you understand me.
Thanks, Ralph20

ralph20 wrote on 7/20/2009, 5:42 PM

Thanks again.
Can you tell me from where I can download " MedialInfo ".
And after that what I have to do with that information.
The files that I been using had been recorded in a Sony Handycam. I downloaded them from the memory card that I use in the Handycam.

musicvid10 wrote on 7/20/2009, 10:25 PM

It's->

MediaInfo

Copy that and paste it into Google.

You have to spell it correctly.

wam104 wrote on 7/21/2009, 2:17 AM

I can totally sypathise here!
I am totally new to Vegas 9.0, and not very clued up on CODECs etc (although I understand the principle).
The main issue as I see it, is that the handycam you are using records in MPEG format (as does mine), but Vegas wont recognise MPEG files, which is frustrating the hell out of me (see the front pages of the Vegas manual).
I am also experiencing "video-no-audio" whenever I open the files in Vegas, yet Windows media player plays the file perfectly. I tried the time-consuming approach of rendering the files in Windows Movie Maker, which converted the files to .wmv which allows the files to be opened in Vegas with both video and audio, but the quality of the picture was awful.
I am getting quite stressed out with this, as I am getting married next month, and really wanted to do something special with the footage we are planning to shoot. I can't belive that Handycams and Vegas are not meant to work well together, so there must be a simple explanation!!!

wam104 wrote on 7/21/2009, 2:31 AM

just been trauling the depths of youtube... this kid has a really good explanation of how to change the mpeg files to vob files, i havent tried this yet but will give it a go... fingers crossed!
hit this site;

let me know if you have any luck!
Wayne

musicvid10 wrote on 7/21/2009, 8:40 AM

Actually, that's a pretty good basic tutorial on changing Windows file extensions. I'll link it in my other thread.

ralph20 wrote on 7/21/2009, 5:08 PM

Hi.
I followed the instructions of the youtube video. I changed one of the files MPG for .vob , I was not one of the luck ones. Now I can see that the files that I bring to the timeline does not have the audio track like the young man shows in the video clip, in one track shows the video and in the second track shows the audio.
Thanks a lot, I am learnig about this Sony Vegas little by little, but I still can not get to the promise land. Ralph20.

wam104 wrote on 7/23/2009, 11:20 AM

Well, I also tried changing to .vob with no luck- Vegas simply wont recognise renamed files with .vob. I have tried .mpg, .mpeg, .m1v, .avi, and many others, yet Vegas still will not recognise audio. My file info =

file type; mpeg-2 format
size; etc, etc,
video codec; mpeg-2
audio codec; dolby digital
number of audio channels; 2

This problem must be common, but I really am stumped at this point. I cannot see why a new Sony-brand digital camcorder can not work perfectly alongside Sony software...

ralph20 wrote on 7/23/2009, 5:44 PM

Hi.I will like to know how to use "MedialInfo" with a file, and what kind of information will provide me in order to maybe fix the problem of no audio.
Thanks in advance.Ralph20.

flyman912 wrote on 7/24/2009, 2:33 AM

Hi,
try up dating Movie Vegas 9 to Movie Vegas 9B via the Sony Web site.

wam104 wrote on 7/25/2009, 1:29 PM

The issue for me has finally become apparant; Sony Vegas 9.0 does not support Dolby Digital codecs when importing files that contain them. The Sony handycam I am using produces Dolby Digital audio codecs written into the MPEG-2 files, which I suspect yours does too- I am told that upgrading to 9.0b rectifies this, but to be honest I cannot justify paying out for updates and upgrades for an editing suite that should already have rectifes this problem. I am now using a Coral editor that was £10 cheaper and is just as good at editing, with the added bonus that my movie clips have that little commodity called audio! I hope you have better luck than I have- Wayne

mike_in_ky wrote on 7/25/2009, 7:38 PM

If you've already got Platinum 9.0, 9.0b is a FREE upgrade.

mike_in_nc