VCD-->DVD: GOP structure correction

[das873]

Hello everybody,
I write from Italy and this is my first post here!

I’m trying to convert my collection of 24 VCD to only 3-4 DVD without re-encoding the video stream.
I have TMPGEnc DVD Author 1.6
First I have copied all the .dat files in a directory and I have renamed them sequenzially.
Then I tried to muont them in a new project wizard under TMPGEnc DVD Author 1.6
The problem is that only few files .dat are able to be mounted in a project.
For all the other .dat files the program reported me an error:

“A video sequence header is necessary for every GOP in a standard DVD
The video sequence header is incorrect. A video sequence header is necessary for every GOP in a standard DVD”

I’ve tried to correct the GOP structure using TMPGEnc choosing the “Standard GOP” (BBIBBPBBPBBPBBPBBP) but the error still remains! (and this way takes a lot of time too…)

Is there any way or program to correct the GOP structure quickly? Thank you!

[jimmalenko]

You might try MPEG-VCR and its GOP fixer. More info here

BTW, I think it's the "output interval of sequence header" setting in TMPGEnc that you need to change to 1

Also, you probably should be extracting the MPEG file out of the dat using ISObuster or VCDgear. Simply renaming from Dat to MPG might cause issues somewhere down the line.

[Soopafresh]

Download VCDGEAR Commandline at http://www.vcdgear.com/files/vcdgear176-040415_win32.zip

Unzip it, and put the executable in the same directory as your .DAT files.

Copy the following commands between the "------" and save it as fixmpg.bat .

save it in the same directory as your DAT files and vcdgear.exe

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

dir *.dat /b >list.txt
for /f %%a in (list.txt) do vcdgear -dat2mpg %%a %%a.mpg

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

Double click on Fixmpg.bat

The fixed files will have an MPG extension.

[das873]

With VCDgear I extracted the mpeg data from the .dat file, but the error still remains.
With MPEG-VCR I tried to fix the GOP structure as suggested, I followed all that specified in the topic you suggested, but the error still remains…
Why, why, WHY!!!!

[scottie78]

Maybe this guide might help ?

[mmasw]

a simple solution (almost always)

simply use TMPGEnc :

File > MPEG Tools > Type = MPEG Program (VBR) > Add (your file) > Save As xxxx

it should correct the GOP headers for the new file

[das873]

Maybe this guide might help ?

I Tried the guide you suggested me and for the most part of my files it was successful!!!
For only 5 of my files, as reported in the guide, there was an error and the fixing process was truncated unexpectedly.
So I tried first to extract the mpeg data from those .dat files using the standard procedure of TMPGEnc (and in this way taking a very much higher time, but for only 5 files it does’nt matter eheheh) at this point the essror in the GOP was still present. Then I re-used the Cut & Merge function of TMPGEnc as suggested and in this case is was successful even for those “bad” files!
The only error il that now the GOP il too long, but in this case I can simply "ignore" under TMPGEnc DVD Author program!!!

a simple solution (almost always)

simply use TMPGEnc :

File > MPEG Tools > Type = MPEG Program (VBR) > Add (your file) > Save As xxxx

it should correct the GOP headers for the new file

As reported in the guide suggested by scottie78, in this case is necessary to reconstitute all the Header structure, and the multiplexing funcion of TMPGEnc is not sufficient. It is necessary to make an entire merge & cut operation (even if the file is only one and there is nothing to merge or to cut eheheh) to reconstitute the header sequence.



Thank you all!!!!
You all great!!!

[hexxisoft]

i just had that stupid assed problem. after attempting every fix i could think of, i ended up just taking a few minutes and re-encoding the files.