Audio sync & video jump problem

[vorston]

I'm converting divX avi video to Mpeg using TMPGEnc and burning to VCD using Nero 5.5. The finished disk plays fine on my DVD drive in my computer but when played on my mintek 2110 DVD standalone player, the video plays fine for a little bit then it jumps and the audio is out of sync until the video jumps again. This runs through the whole movie.

I have a couple movies that were already in mpeg format and when these were burned off onto VCD they play with no problem. This makes me think that the problem is in the conversion using TMPGEnc. Is there a setting in TMPGEnc that can fix this?

Any ideas would be apprieciated.

Thanks in advance.

[kjmacke]

Did you encode at 29.97 frames or 23.976 frames???

[vorston]

The DivX source files were in 23.976 so that's what I went with when I converted to mpeg.

[kjmacke]

I had the same problem with 23.976 divx. I encoded them to 29.97 and that got rid of my problem with my dvd player which is a apex 660. Hope this helps you out.

[CyeN]

I get this problem too. Using 23.9 or 29.9 fps. My video speeds up or slows down going briefly out of sync and then back in. It doesnt matter which FPS I use. The DIVX file i'm converting from is fine. The MPG file checks out ok and plays fine on my PC.

I've used the VCD and VCD NTSC Film templates and made XVCDs fo my own tweaking.

Its seems to be TMPGENC since i have done videos in Xing Mpeg (which looked liked crap) that played fine.

Anyone else have any new insights into this?

[xoRFa]

i have the exact same problem... If i burn the converted vcd/svcd and play it on my pc, it plays fine but when playing on my standalone dvd player, the video/audio goes out of sync every couple of minutes...

[CyeN]

OK, after a lot of experimenting (and my computer isnt fast to begin with) I found that my only VCDs and XVCDs that have worked, had CLOSED GOPS.
I dont know for sure yet, but that seems to be the case. I have also had better results with my player (RCA 5240p) using CQ_VBR instead of CBR.
But so far I'm thinking that CLOSED GOPS is the solution.
After I try out a few more, I will tell everyone how it goes.

[vorston]

I will try the closed GOPS option as well and report back.

Thanks for the idea.

[CyeN]

Burned another movie with Closed GOPs and it worked too.
Seems I have found a solution for the problem at least in my case.

[vorston]

Tried encoding at 23.976 fps with closed GOP's. This reduced the problem, but there were still som audio /video jumps. Encoded the same movie at 29 fps with closed GOP's - SUCESS! No jumps at all! This is on a Mintek 2110 DVD player.

[CyeN]

Tried encoding at 23.976 fps with closed GOP's. This reduced the problem, but there were still som audio /video jumps. Encoded the same movie at 29 fps with closed GOP's - SUCESS! No jumps at all! This is on a Mintek 2110 DVD player.

Encoding at 29fps works very well for my player too. But i wanted to the extra quality per frame thats provided by encoding at 23.976. But if that works great for you, great!

[s_u_fee]

I'm a newbie so i would appreciate your help! I'm kinda lost here.
How to convert my avi from 23.976 to 29 fps with closed GOP's ?!
What option should i use in TMPEG ?! or is there another program that i should use before i use TMPEG?

Thanks very much for your help.

[vorston]

you can encode in 29 fps with TMPGEnc. When the wizard starts just choose NTSC instead of NTSC film. As for the closed GOPs, on the third window on the wizard, click on the other settings button - when that window opens goto the GOP structure tab and click the "output bitstream for edit(closed GOPs)" option.

Hope this helps.

[toddk63]

I think I found the fix for my APEX 1500 for the "Video Speeds Up" problem.

Sorry if I'm being redundant describing the problem here. Apparantly the APEX machines don't handle real time telcining well when playing 23.97 VCD. Converting it to 29.7 solves the problem, but adds 20% to file size(for same quality)

I read on some other forum for APEX 1500 that this guy tried "this and that" and it fixed his problem..He went on to add "Oh yeah, and I upgraded the firmware too. Don't know if that had anything to do with it"

Hmmm...I thought I might try the firmware upgrade first (www.nerd-out.com) before messing with 3:2 pulldowns, GOP's and all that jazz. It seems to have fixed it!! My regular 'ol 23.97 VCD plays fine know.

Todd K.

[______]

I've always had that in and out of sync problem with tmpgenc and only tmpgenc. No other encoding software gives me those results. My solution was to NOT let tmpgenc encode the video and audio at the same time. I'll do the video by itself in tmpgenc and the audio with something else. Then mux the audio and video together with bbmpeg. That solved all my random sync problems.