Bug in vegas 8.0c ?

[seifer almasy]

I have googled around but have been forced to sign up because although a few people are getting these 2 issues, no one has a solution.

My problem is 2 fold.

1. When dealing with large MPEG2 files Vegas chops a lot of data out of it and this is then displayed as a large red or green area where the missing data is. if there are many of these mpeg2 files, vegas will crash.

I got out of this by never using normal stream mpeg2 or VOB inside vegas, instead, I now use the Transport container for MPEG2. I copy my mpeg2 direct from DVD using anydvd and VideoRedo.

2. The second problem arises when using the transport container mainly. When the audio of the mpeg2 is AC3, vegas gives this error (and closes):

Sony Vegas Pro 8.0
Version 8.0c (Build 260)
Exception 0xC0000005 (access violation) WRITE:0x5160000 IP:0x24A02BE1
In Module 'mcdddec.dll' at Address 0x24A00000 + 0x2BE1
Thread: Audio5Reader ID=0x850 Stack=0x485F000-0x4860000

I have traced this dll as the main issue. It is the ac3 decoder. If I delete the dll from the folder, the wave will obviously not be used in the editor but the video loads just fine. Therefore this is a specific problem with AC3 especially when using the transport container for MPEG2. I did not get this issue with 8.0a (if I remember right)


I know people often say "well mpeg2 isn't editing friendly", but the transport method has been a big help and has eliminated all bugs I had. Now the main issue is AC3 decoder problems.

The only way I have been able to solve all issues is to use a transport stream mpeg2 and convert the ac3 to Mpeg audio using videoredo. But I have quite a few clips especially 5 HUGE mpeg2 files. (have a look here in HD mode> http://www.youtube.com/watch?v=hYWYuNti6Uo&fmt=22

Any help appreciated. Now to report a bug with videoredo.....

[seifer almasy]

This is an example of how sony vegas perceives video. Even transport streams seem to be affected some times but nearly always it is program stream. The program stream is usually corrupted so badly in vegas that massive chunks are chopped out.

The above example seems to only appear on 1 frame or a few frames inside the video. Strangely, when I encoded the file, the green frame above was not shown in the resulting video and then to my surprise the above frame was corrected on the time line.

I think there are some serious issues with vegas and how it handles mpeg2

[seifer almasy]

no one?

[minidv2dvd]

sorry mpeg-2s works fine in vegas here. i try not to use it as an editing source though. you might convert them to a lossless avi like huffyuv or lagarith first instead if you can't get it to work.

[filmboss80]

First, you need to make sure you've made a clean rip of the DVD source to your harddrive. You should also have a separate video harddrive than your boot drive. You seemed to sneer at the comment that "mpeg2 isn't edit friendly," so it is difficult to help you if you are going to shut us down from the onset. Certainly, the newer, Pro version of Vegas should handle mpeg2 fine, but I'm not sure about the version you have. Most people here edit mpeg2 with an actual mpeg2 editor, or else (when effects, transitions, and more complex editing is required) will convert it to DV or uncompressed AVI to edit in Vegas (or Premiere, etc). If you insist on doing things only your way, I don't know how much assistance we can be to you. This is why there has been little response so far to this thread.

I also don't think it was wise to assume a .dll file was the source of your problem, and you may have made things worse by messing with it.

But to answer the question in this thread's title: No, I don't think your problem is a bug in Vegas.

[seifer almasy]

Well you are flat out wrong; it is a bug with the dll (either that or videoredo has a problem outputting decent mpeg2 files, which is why I asked this question). The audio as I stated, worked FINE when the program stream of mpeg2 is used. That is FINE. The transport stream on the other hand is not fine with ac3. The error report from the crash is in my first post.

Yes you heard me right bud. VEGAS CRASHES. And that dll is the ac3 decoder. It SAYS SO.

So, 3 questions arise.

1. Why doesn't vegas crash when I use ac3 with a program stream
2. Why does it when I use a transport stream.
3. Why is mpeg2 video all corrupted when using multiple mpeg2 program streams or long mpeg2 program streams.

My mpeg2 files are fine and it doesn't matter which mpeg 2 you import. I am making a very large bruce lee tribute. We are talking huge. The length of ther imported clips is great. I suggest you do some tests and then tell me nothing is wrong. This isn't debatable. There IS a bug in vegas in that it does not handle mpeg2 well at all, with or without videoredo being an issue, which it probably isn't. And crashing is unacceptable ina program of this standard (I program small software too)

I did not sneer at any suggestion, the fact is, if an editing software is going to allow a format to be imported, then it should work. Ac3 importing is relatively new to vegas.


I also don't think it was wise to assume a .dll file was the source of your problem

< yes we can, because once it is deleted the file loads fine. It is only when the audio tries to load in a TRANSPORT STREAM that it crashes. The larger the mpeg2 file, the more it crashes.

---------

on huffyuv. I do use it now and then, but the amount of data I have would mean a project taking an incredible amount of space. It jsut isnt worth it.

[seifer almasy]

ps thanks for lagarith. I will use it for some future projects I am sure.

[SCDVD]

Do you find the treatments painful?

[seifer almasy]

Do you find the treatments painful?

No just idiocy. If you haven't got anything to bring to the discussion kindly move aside.

[seifer almasy]

For the purposes of accuracy.

I have found that using tsmuxer makes vegas load transport streams correctly. Therefore must deduce that the transport streams that videoredo makes have an issue with 8.0c vegas and that videoredo must provide rather dodgy mpeg 2output support. Either that or sony vegas is extremely sensative about exact formatting which would be poor.

[Wile_E]

http://www.sonycreativesoftware.com/vegaspro/techspecs

I have Vegas Pro 8, with the 8.1 update. If you read the specs, AC3 is not a supported format to import into the Vegas timeline. Only DVD Architect supports AC3.
I don't ever use AC3 on timeline, so I'm not sure if they added support for it recently. But according to the tech specs, no import support.

It would be best to split the video/audio into seperate files first. And convert AC3 file to something else.

[Ninjaboy]

Also getting crashes when trying to use mpeg2's with AC3 encoding in Vegas.

From various forum posts seems like its either:
a. the fact that AC3 isn't supported
b. 64bit operating system

We've tried quite a few things and we're about to give up, go to 32bit or covert all our files to Avi's.

[seifer almasy]

http://www.sonycreativesoftware.com/vegaspro/techspecs

I have Vegas Pro 8, with the 8.1 update. If you read the specs, AC3 is not a supported format to import into the Vegas timeline. Only DVD Architect supports AC3.
I don't ever use AC3 on timeline, so I'm not sure if they added support for it recently. But according to the tech specs, no import support.

It would be best to split the video/audio into seperate files first. And convert AC3 file to something else.

ac3 is supported in 8.0c

It has a dll especially for that task (and as I said, if ac3 is with a program stream or txmuxer makes the file there is 0 issue). And even if you forget ac3, the other issue vegas has is long mpeg2's or a load of them have severe issues. Vegas does not like program stream mpeg2 for certain, with or without ac3

Whether this is how videoredo outputs mpeg 2 i am not sure but sony vegas is very sensative about mpeg2

I use 32 bit windows.