Mpeg 2 to Mpeg 1 & Audio Sync Problem

dgoldan · Post by **dgoldan** » Thu Dec 01, 2005 5:12 am

I have several DVDs that I want to pull smaller clips from and insert into PowerPoint. I have imported the necessary chapters using the insert DVD video, resulting in the temporary Mpeg 2 files in the Capture directory. They seem to have the audio and video in sync just fine, but I can't use them in PowerPoint as Mpeg 2s. I have then inserted them into the timline and used the multi trim function to save just the 20 or so seconds that I want. I then share by creating the file as a custom format, using Mpeg 1 at 720x480, but the resulting files have the audio considerably out of sync from the very beginning. Creating using the standard Mpeg 1 settings (320x240) don't produce the same audio sync problem, but aren't large enough on the screen for what I want without stretching them, thus causing a pixelated look.

System Specs:
2.4Ghz
WinXP
512Mb Ram
30Gb hard drive with 20Gb free
NTSC

Did I forget anything important as far as problem details?

Any suggestions?

Dan

sjj1805 · Post by **sjj1805** » Thu Dec 01, 2005 5:35 am

MPG-1 is 352X240 resolution. MPG-2 is 720X480 resolution. You use MPG-1 files for VCD, MPG-2 for DVD. However, MPG-1VCD has to be White book standard which is Video data rate 1124Kbs and frame rate 29.97 fps for NTSC. Audiostereo 224 kbps bit rate.44100 Hz freq.

ccblue · Post by **ccblue** » Fri Dec 02, 2005 10:08 pm

dgoldan,
I had a similar problem with audio out of sync with video on clips where I used the multi-trim function. They were also files that I imported from a DVD. Once I put in a transition around those multi-trimmed clips the oos was even worse. I did resolve it using the save trimmed video function (it's in the drop down menu going across the top of the program). When I replaced the multi-trimmed video with the saved video, the oos problem disappeered. I'm using Video Studio 9, not sure which version you have. Not sure if it's the same problem, but hope this helps.

DVDDoug · Post by **DVDDoug** » Sat Dec 03, 2005 1:07 am

Firstly, MPEGs are not meant to be edited.

Here's what I discovered -
Editing an MPEG can cause "sneaky" corruption that doesn't show-up 'till the file is re-rendered or re-multiplexed. I assume that the resulting output file is no longer corrupted... it's just out of freeking sync! (Like ccblue, I had used transitions to join clips.)

I've been using a special-purpose MPEG editor called Womble MPEG Video Wizard ($100). I no longer have any sync problems.

Womble is an MPEG-2 editor only. It's not a DVD ripper or a DVD authoring tool, and as far as I know, it can't save in MPEG-1 format. So, you will still need Video Studio (or other programs) to accomplish your task.

sjj1805 · Post by **sjj1805** » Sat Dec 03, 2005 1:57 am

For a further explanation please see my reply here
http://phpbb.ulead.com.tw/EN/viewtopic.php?t=9046

dgoldan · Post by **dgoldan** » Mon Dec 05, 2005 12:34 am

I AM able to trim the Mpeg2 down using this, but when I convert to an Mpeg 1, it screws up the sync at that point. I forgot to mention that I also have VS9 installed on a work laptop that is a 1.2GHz. While it takes significantly longer to import and then save as an Mpeg1, I don't seem to have the sync problems on that machine. On another note though, when I import DVD video on the laptop, it will only import the entire DVD, regardless of whether I check the box for just one chapter or not.

I would use the standard MPeg1 size that's in the drop down list, but I want closer to full screen when showing it back through PowerPoint, that's why I chose the customs settings originally.

ccblue wrote:dgoldan,
I had a similar problem with audio out of sync with video on clips where I used the multi-trim function. They were also files that I imported from a DVD. Once I put in a transition around those multi-trimmed clips the oos was even worse. I did resolve it using the save trimmed video function (it's in the drop down menu going across the top of the program). When I replaced the multi-trimmed video with the saved video, the oos problem disappeered. I'm using Video Studio 9, not sure which version you have. Not sure if it's the same problem, but hope this helps.

sjj1805 · Post by **sjj1805** » Mon Dec 05, 2005 9:57 am

Powerpoint supports other formats that can be created with Video Studio such as quicktime, WMV etc, Have you tried making a test clip in some of those and testing them with Powerpoint?

dgoldan · Post by **dgoldan** » Mon Dec 05, 2005 11:57 pm

Hadn't thought of that. I will give it a try. I'm also trying the complete removal and re-install of VS9.

Thanks,
Dan

sjj1805 wrote:Powerpoint supports other formats that can be created with Video Studio such as quicktime, WMV etc, Have you tried making a test clip in some of those and testing them with Powerpoint?

dgoldan · Post by **dgoldan** » Sat Dec 10, 2005 5:48 pm

Well, I was never able to create any format video at 720x480 that would play in PowerPoint using VS9 without some sync problem. What I DID find was another freeware conversion tool listed in one of the other threads here.
http://www.erightsoft.com/SUPER.html

This thing works great. I can edit my Mpeg2 file down to what I want, then convert it to Mpeg1 (or any one of 30 other formats) at 720x480 and it works flawlessly.

Dan