Audio Sync Problem when combining MPEG-2s with TMPGEnc

[Wizard Zorander]

I recently acquired a very large video (four cds) and through the use of virtual drives managed to get all four pieces on my harddrive at once. I wanted to combine the four pieces so that I could watch the whole video uninterrupted. I used the guide provided by this site (the files are all mpeg-2). Everything worked as the guide said it would, but when I ran the movie file I ran into an audio sync problem. About a minute before the first cd would end, the audio from the first CD cut out and the audio from the second began, but the video kept going as it was supposed to. So I ended up with a video file with three fourths of the film having the audio be off by at least a minute and I was wondering why this happened and what could be done to correct it. Any help would be appreciated, Thank you.

[andyrice_2000]

Hi mate,

Well that you need to do is match the exact length of the audio with the video. Now I have the same 4 discs and I have successfully created a supurb DVD from them. You will find the audio is slightly longer than the video. So seperate the audio and video in TMPGEnc. You will then need to get the exact length of the Video File and the Exact length of the audio file. Then the difference you have needs to be removed from the END of the audio file. Now put them back together and you will have perfect sync.

[xerces3379]

I had 40+ MPEG-2 files that I wanted to paste together so I just went into a DOS promt and did

copy /B *.mpg BigFile.mpg

(Just to be absolutely clear, all the MPEG's must be in the same directory when you do this, and file names need to be alphabetical for the order you want them copied. i.e. file1.mpg, file2.mpg, etc ...). /B is for Binary copy (not ascii).

This worked for me for play back and for re-encoding in TMPGENC. However, you must have enough HD space for (sum of original file size * 2). Also, DE-Multiplex under MPEG Tools in TMPGENC did not work after I did this.

Note, I am 99% sure this won't work with AVI files, only MPEG, and it may not work with all MPEG files, I might have been lucky. Can anyone confirm this?

The 40 files I had were from the Creative Video Blaster Digital VCR. For those interested, I should be posting my method to create quality SVCD's (i.e. commercials editted, no audio sync problems) from the Digital VCR output soon. (Still perfecting the method).

<edit>Please note correction to DOS command at top.

[Wizard Zorander]

What program would I use to cut off the extra audio?

[andyrice_2000]

The program I tend to use is COOLEDIT, its very simple to use and is ver precise at cutting.

Hope this helps