Audio Video out of sync from recovered files

[Weeination]

In a different post on making menus I mentioned that I have files which are from a DVD that did not finalize on my Panasonic recorder. The files were extracted with a program called IsoBuster and then another program was used to convert the files without a re-encode so that X8 could accept them. I am able to make video files to burn to a DVD from these files but the problem is that I am having out of sync issues.

With another video I was experimenting on a couple of months ago, I uploaded it and Lata was very helpful in testing it with X8. Those results eventually led to my purchase of a new computer along with X8. This resulted in correcting the out of sync issues I had been having in the past with VS 9 & 10. That is up until I have been working with these extracted files.

Perhaps there is no way to correct this problem with X8 considering the source files but I wonder if there someone had any suggestions?

[skier-hughes]

Depends on what is causing the out of sync issue.
If the saved file is out of sync, it is out of sync and that's it. You could try converting the original file again, with a different programme to see if it gives better results..

[Weeination]

Just so there is no confusion, the original recovered files are in sync. So are the converted files (using Dvdvobd2mpg) which allow X8 to recognize them.

I tried using Nero (version 15) but the files are not recognized.

[lata]

Hi

It is a little concerning that you have used several programs to convert the video.
I would suspect that the files are corrupt especially if programs like Nero don’t recognise them, even though they play and appear in sync’ using VLC player etc..
If they are corrupt then Video Studio will struggle with them.

There is a big difference in Playback (de-coding) and Editing / creating a video (re-coding)

Your best option was to use the original recorder to finalise the video, then Vs X8 should be able to read it. If that is not possible then you are stuck with the problem, but continuing to convert the video is clearly doing no good.

If you use other recorded video where the disc has been “finalised” are you having the same problems?

I assume you still have the original disc.....As a final try there is a program called DVD Shrink, that may rip your disc to suitable Mpeg2 files.
I am not sure if you have tried that?

[Weeination]

Hi Lata

If it matters, the source file is not being edited in any way before the creation of a video file. Also, after the video file is created using "Same as first clip" then it is 1/15 of a second shorter than the previous file.

The disc itself will not finalize. There was an error that occurred when recording the last title. Then the recorder went into "self check" mode. When that ended I could no longer record on that disc, make any changes and it won't finalize. It however will still play fine but only on Panasonic recorders. Without IsoBuster there are no readable files on the computer.

One thing I did before using IsoBuster was play the disc on one Panasonic recorder and record it again on another Panasonic recorder where I was able to then finalize that disc. However that involved a re-encode which results in a very small loss in picture quality.

With IsoBuster and Dvdvobd2mpg I am attempting to have the disc play on all players without any re-encode involved and of course have the audio and video still in sync. With the results I have been having I don't know if that can be done.

With this newer computer and X8, I am not really having out of sync issues on discs that are finalized on my Panasonic recorders, as long as I use "Same as first clip" when creating a video file.

[skier-hughes]

Mpeg's are a lossy format, which means each time you save it, even if you choose the same properties you will lose quality.
So, you choose the best programme, the lowest number of saves and decide which end file looks best to you.
Mpegs are also made for viewing not editing. The way they are composed with a variety of different frames etc can often cause the problem you are seeing, ie a difference in file length. Diffeent programmes will show different effects.

[Weeination]

I created a video file with X8 using "same as project settings". Well that video file is in sync and is the same length as the file converted with Dvdvobd2mpg. However the problem is that the video file is a little larger than what will fit on a DVD (4.62 GB > 4.38 GB). That also leaves no room for the additional short titles I want to add which are also on the original DVD. If that is the best result that can be obtained, I prefer the real time re-encoded copy made from one Panasonic recorder to another.

[lata]

Hi
You do not give us any details of the project properties???
The Data Rate (Bit Rate ) controls the size of the video file, reducing this will also impact on quality, but probably not noticeable for what you need.

Modify the Project Properties, I assume they are set to DVD?

Audio
Make sure you use Digital Dolby rather than LPCM, that will reduce the audio data rate reducing the overall file size.
Video
Changing / lowering the Video Data Rate from say 8000 to 7500kbps will also reduce the file size to fit to disc.

[Weeination]

The project properties had matched the video's properties meaning the bit rate was 9334 with Dolby Digital audio and a bit rate of 384 kpbs. The video file created using "same as project properties" which is larger than what would fit on a DVD appeared to be in sync when playing both the video file and the file created with Dvdvobd2mpg simultaneously during the last minute of the program. With out of sync issues that is usually where I find they are at their worst.

However after reading your last post I decided to create another video file using a bit rate of 7500. I didn't consider that before because I felt that any reduction in the bit rate would serve no point as I already have the re-encoded copy made from the disc won't finalize made in real time from one Panasonic recorder to another. I would therefore be trading one copy with a very small loss in quality for another copy with a very small loss in quality.

After that new video file was created I did the same comparison, playing both the video file and the file made with Dvdvobd2mpg simultaneously. In the last minute of the program I can hear the audio being slightly out of sync. I them checked the middle of the program. The audio and video is actually more out of sync, much more than in the last minute of the program. I then once again compared the video file mentioned above which I thought was in sync using "same as project properties" (the file which is larger than would fit on a DVD) with the file created with Dvdvobd2mpg but this time at the middle of the program. To my surprise the audio and video was almost as out of sync in that part of the program as on that video file using a bit rate of 7500.

It appears I won't be able to create a video file with X8 that is in sync in its entirety from files which are extracted by IsoBuster (from a disc that won't finalize) and then converted with Dvdvobd2mpg.

[skier-hughes]

What are you wanting as your final outcome?
If it is to have a playable disc, are you saying you have this from your disc to disc copy?

[lata]

Hi

So you are saying that the original file before using Video Studio is Out of Sync – Audio to Video sync’

That was created by using Dvdvobd2mpg

What file did you use in Dvdvobd2mpg? or was that the original DVD Disc.

It may be that Dvdvobd2mpg is causing the OSS
Then again the Disc may be OSS given that it did not complete the recording nor finalise the disc because the machine crashed during recordings?

[Weeination]

What are you wanting as your final outcome?
If it is to have a playable disc, are you saying you have this from your disc to disc copy?

Yes I do, from the re-encoded copy from one recorder playing the disc that can't be finalized on another Panasonic recorder. That copy is playable on all players and the computer. The only problem is the very small loss in quality which is what I was trying to avoid with IsoBuster, DVDVob2Mpg (to allow the files to be recognized by X8) and of course X8 itself. That is why in my initial video files I was using Smart render but with the out of sync issues persisting I then disabled Smart render but still got out of sync issues.

So you are saying that the original file before using Video Studio is Out of Sync – Audio to Video sync’

That was created by using Dvdvobd2mpg

What file did you use in Dvdvobd2mpg? or was that the original DVD Disc.

It may be that Dvdvobd2mpg is causing the OSS
Then again the Disc may be OSS given that it did not complete the recording nor finalise the disc because the machine crashed during recordings?

The file used in DVDVob2Mpg is from the original disc that won't finalize. Those files were obtained using IsoBuster. Without IsoBuster those files will not appear on the computer. Without DVDVob2Mpg converting the files (the extracted files from IsoBuster) they are not recognized with X8.

The unfinalized disc itself as played on a Panasonic recorder is still in sync just as if it was properly finalized and no recording error occured. I even rechecked the same middle part of the program just now from the copy made in real time from one Panasonic to another Panasonic (from the unfinalized disc to another disc). The check was made on this same computer and the audio and video looks to be perfectly in sync.

All along I thought that the file created with Dvdvobd2mpg was in sync. That is when I was checking only the last minute of the program. However now looking at the middle part of the program where the OOS seems to be the worst, I now seem to see a very slight bit of OOS on the file created by DVDVob2Mpg and played on X8. It is not as bad as the video file created from that file, however comparing the file made with DVDVob2Mpg to the disc to disc copy there is a difference.

The disc to disc copy looks to be the best copy I will get from that disc that won't finalize for playing on any player or computer. I can also still play that unfinalized disc of course, as long as I am using a Panasonic recorder.

[Weeination]

By the way Lata, I just burned a disc from that other project you were helping me with over the summer.

It looks good and in sync. I find it hard to see any difference in the picture between the burn with X8 and the original recording. VideoStudio has always been great at maintaining video quality with Smart Render and X8 is excellent in that regard.

The processing stages during the burn caught me off guard however. In my first attempt, X8 hung at around 97% during the audio/video multiplexing stage. On VS 9 & 10 this never happened. Thinking that X8 froze up I closed out of it. I also didn't realize that unlike VS 9 & 10, at this point it already started to burn onto the disc. In effect I wasted a disc. On the next attempt I left X8 alone and it did get past the 97% mark during the audio/video multiplexing stage after waiting a couple of minutes. Then a successful burn was made.

[Weeination]

One thing I didn't mention is that the file created by DVDVob2Mpg appears to be in sync even in the middle of the program when played on Windows Media player and VLC, unlike X8 which appears to play that part just slightly out of sync.

Post edited by Lata
Even so I still suspect the file is corrupt rather than a Video Studio problem.

[lata]

Hi

First you are best to “Create a Disc Image”, an ISO file rather than “Create a Disc”.
You can play the Iso using VLC Media Player which will also play the menu, good for testing the menu.
Once satisfied that the movie is Ok -- burn the ISO to disc using Tools – Burn from Disc Image ISO.

Using this approach will reduce the number of coasters we make.