Mpg Conversion Problems

[bpezzell]

I've been trying to find a solution to a problem but no luck. I have created a couple of DVD's that had two original files-one was AVI and the other was mpeg. After the burn, video from the AVI source worked fine, while the video from the mpeg source suffered from a severe lag in audio.

 

Anybody got any clues?

[Guest mlpasley]

Yes. The program isn't encoding and reencoding properly. The problem is that there are no mpeg2 standards and different companies use different codecs. Any time you encode and decode you can have audio/video sync problems with mpeg2.

 

However, there may be hope. First, try a File\ Output production to.... and select DV Camcorder. That will output the entire file as a DV AVI file. Then put that new complete movie onto a menu and burn to a DVD. (You might want to use a DVD RW until you see if it works.)

 

If that doesn't work, you might have to put that mpeg2 video onto a storyboard and try outputting that as a DV AVI file and then put it onto a storyline.

 

There may be other options, and someone else may have suggestions that I haven't thought of.

[jgrogersny]

I've been trying to find a solution to a problem but no luck. I have created a couple of DVD's that had two original files-one was AVI and the other was mpeg. After the burn, video from the AVI source worked fine, while the video from the mpeg source suffered from a severe lag in audio.

 

Anybody got any clues?

I have the same problem. I've been browsing through all the helpful advice and tips in this forum and I am trying to do what has been suggested. I have an MPG file that was created by ATI MMC capturing from my All-in-wonder tuner. It was captured at the highest quality mpeg setting. I used DVD builder to "burn" it to an ISO file and used the preview in Disc Copier to play it back. The beginning of the file is fine, but near the end the audio lages the video by a second or two. I did not edit the mpeg at all since the capture, just brought it into DVD builder as the only title.

 

I've had this audio lag problem pretty consistently with EMC 7.5, no matter which variation of processing steps I've tried. It makes an unusable DVD. I had an earlier version of EMC, but I don't think I tried to use it to put an mpeg onto a DVD.

 

I guess I will try the AVI output suggestion and see if that helps.

 

Is anyone able to burn a DVD from an MPEG with EMC 7.5 without getting the audio lag?

 

Bpezzell, can you say what the source of your MPG file was?

 

BTW, thanks to all who take the time in this forum to try to help those of us with less experience with EMC,

John

[Guest mlpasley]

Is anyone able to burn a DVD from an MPEG with EMC 7.5 without getting the audio lag?

 

Some people can do it. They are usually the people who are able to import their video with EMC7. The problem is reading the time code correctly and encoding and decoding correctly. I don't know of any software package that gets this right 100% of the time especially if the video has been captured using another software package.

 

Some people have also found that capturing in smaller segments helps if it starts to go out of sync after a certain amount of time.... no guarantees though.

[jgrogersny]

They are usually the people who are able to import their video with EMC7.

Using all Roxio software worked!

 

I captured 90 min of Olympics from my ATI All-in-wonder tuner using Roxio

Capture at the best mpeg setting. Then I used DVD Builder to create an ISO file,

then used Disc Copier to create a DVD+RW. The audio is now in synch in both the

ISO file playback in Preview and on the DVD! Disc Copier said the quality would

be good, not too much compression needed, and the DVD quality is pretty good.

Good enough for my needs right now. This doesn't solve all my problems;

recording on a schedule, instead of live, and the time required for the two

steps, but it is progress.

 

Then I tried to go directly from the mpeg file to DVD+RW with DVD Builder. I

couldn't as it said that it wouldn't fit on a 4.7 GB DVD, even at the lowest

quality level. I wonder why Disc Copier could make the ISO file fit, but DVD

Builder couldn't make the MPEG file fit.

 

It it helps, the iso file is 6,299,712 KB and the mpg source file is 6,151,984 KB.

 

So, thanks for the advice, ml.

 

BTW, I tried a short test to capture to an AVI file, but the audio was AHEAD of the video :-).

[o44wen]

This is my problem below (copied from another website that couldnt give me any help)

--------------------------------

Hi guys when i try to use the DVD Builder in Roxio and burn my movie to a dvd in full it works great. However when i add chapter to the movie for easy jumping the sound and picture seems to go out of sync. I have tried many ways to fix this problem but have found nothing yet. It cant be widely known as many PC mags recommend the programme and give it full marks.

 

I have been trying for months now to get this to work proper. I did think it was my old tv card that was causing the problem but its not as the new tv card has the same issue.

 

I have tried to burn at slower speeds, tried to encode it first and then to burn to dvd at various speeds, tried to encode on various video formats to DVD and VCD.

[Guest mlpasley]

but DVD Builder couldn't make the MPEG file fit.

 

It it helps, the iso file is 6,299,712 KB and the mpg source file is 6,151,984 KB.

 

So, thanks for the advice, ml.

 

BTW, I tried a short test to capture to an AVI file, but the audio was AHEAD of the video :-).

 

You're welcome.

 

The answer is pretty simple.... DVD Builder doesn't have the capability to 'shrink' the mpeg2 file like Disk Copier does from an .iso file.

 

The difference in the size is due to coding for the menus, etc. that needs to be added to the mpeg2 files to make it play in a DVD player. The only way you could get that mpg source file onto a DATA DVD would be with a dual layer 8.5 GB DVD and dual layer burner.

 

As to the audio being ahead of the video.....It's possible that the sound card is out of sync with the ATI All-in-Wonder. They are connected inside the computer. If I remember correctly, ATI includes testing software to see if the sound card meets the standards of the card. If that's not the problem, then I have no idea what's wrong, but I'm glad it works in mpeg2.

[jgrogersny]

First, try a File\ Output production to.... and select DV Camcorder. That will output the entire file as a DV AVI file. Then put that new complete movie onto a menu and burn to a DVD.

Maybe I'll record my next test here in case it helps someone else....

 

I have a movie that was captured by ATI MMC from my All-in-wonder tuner as a high quality mpeg. I tried the approach ml suggested above, and it worked fairly well. I burned to a DVD+RW and the resulting disk has in sync audio with low video quality. (DVD builder said that it would be low quality and it is.) One odd thing is that when I play the DVD on my computer with a couple of different players, it has a blurry section at the bottom maybe one sixth of the screen. When I play it in my Norcent set top player, it doesn't have that.

 

So I now have a fairly watchable DVD where before I had none. Much better!

 

Thanks again, ml.

[Guest mlpasley]

One odd thing is that when I play the DVD on my computer with a couple of different players, it has a blurry section at the bottom maybe one sixth of the screen. When I play it in my Norcent set top player, it doesn't have that.

.

 

Not quite so odd. TVs have an area that won't display part of the picture. To see what that area is, in VideoWave, find a scene with text on it and choose Edit\Text. Click the fourth icon from the left on the top (boxes in boxes) and it will display the TV Safe area.