WHEN I CONVERT FROM AVI TO VCD THE PICTURE IS NOT SMOOTH??

[DJSR]

WHEN I CONVERT AVI TO VCD USING TMPENC, AND THEN I PLAY THE VCD IN MY DVD PLAYER, THE PICTURE SCROLLING/MOTION IS NOT SMOOTH. IT LOOKS KINDA JERKY AND SOMETIMES I GET PICTURE FREEZE.

I AM UNSURE ABOUT SOME OF THE SETTINGS TO ENCHANCE THE PICTURE USING TMPGENC, COULD YOU PLEASE HELP?? THANKS

[NecroWulf]

i've also seen this effect on some *.mpg that I produced. I have yet to find solution for the problem.hopefully some guru will bless us with his insights.

-Necro

[DJSR]

Ok thanx for the info, at least i dont feel alone now,

If anyone knows about this be appreciated.

[HillJack]

Your problem could be a field-order issue.

What program are you two using to convert to mpg? TMPGEnc or CCE or...? What is the source of the .avi file (vidcap, dvdrip...)? What resolution is the mpg being encoded at?

[NecroWulf]

TMPGEnc, And as for the source of the file, I'm not sure? All i know is, I'm able view the video under WMplayer and DivX.

But here are the source file's attributes...
Audio Format:MPEG Layer-3,128 kBit/s, 44,100 Hz, Stereo
Video Format:480 x 304, 175550 Frames, 25.000 Frames/Sec, 93 KB/Sec, Unknown Format

TMPGEnc reports the following... (after a demo copy has been created), under Multiplex...
MPEG-1 Video 352x240 23.976fps 1150kbps
MPEG-1 Audio Layer-2 441000Hz 224kbps

Although all seem's well in the begining, a few seconds into video the stagging motion starts (slight viewable pauses).

-Necro

[HillJack]

Hmm... Is your avi file interlaced? (are there horizontal lines on edges when the camera pans or people move?) Your problem sounds like an incorrect field order to me...

Try this:

In TMPGenc, goto the Video Settings --> Advanced.

Check the "video source type" box. Is it "Interlace"? If it is, check the next box below it "field order" and then down in the large white box you'll see a "Deinterlace" option, double click it.

Now at the bottom of the window that appears, choose "Even-Odd field (field)" and then scroll the video to some point where you know the jitters happen, and press the forward button to scroll frame by frame. Is the jittering happening now? If yes, then the field order is incorrect (choose cancel and change the "Field order" option box to the other setting and double click "Deinterlace" again and choose "Even-Odd field" and scroll again). It should be fixed -- one field setting will cause jitters and the other won't. You want to choose the one that won't

If you've found the correct field order setting, uncheck the "Deinterlace" box (unless you want to deinterlace, then you have to pick the method you like the best... I prefer Odd-Field (adaption) personally).

If that doesn't help you, I don't know what the problem is Perhaps your problem is not what I'm thinking of.

[bugster]

But here are the source file's attributes...
Audio Format:MPEG Layer-3,128 kBit/s, 44,100 Hz, Stereo
Video Format:480 x 304, 175550 Frames, 25.000 Frames/Sec, 93 KB/Sec, Unknown Format

TMPGEnc reports the following... (after a demo copy has been created), under Multiplex...
MPEG-1 Video 352x240 23.976fps 1150kbps
MPEG-1 Audio Layer-2 441000Hz 224kbps

Your problem is likeley to be right there. Your source file is 25fps (PAL), your output file is 23.97fps (NTSC film). TmpGenc is attempting to do framerate conversion, probably by removing enough frames from the original to get the right framerate without affecting the length of the final movie. There are a several possible solutions.

1) Encode the movie using the VCD (PAL) template. This assumes you can play PAL format movies on your DVD player/TV

2) Follow the PAL->NTSC conversion guide found under the convert howto on this site.

3) There are sure to be other soultions but I can't think of them right now!

Of course it could also be a field order problem

Hope This Helps

[DJSR]

I have found out some more info on improving this jittering/bad motion.

When encoding on TMPGEnc, choose best quality convertion, instead of just normal. The only drawback on this is the amount of time it will take to convert.

After you have used best quality convertion, you should find the jittering/bad motion scrolling to be much smoother.

This info was provided by an unknown source, but makes sense.

If anyone knows more about this, ur posts would be much appreciated!!

[Big_Jit]

bugster is right!...

Your Source Video is PAL
You're trying to output to NTSC(film)

That's why your video looks jerky!

Just Encode to using the PAL template and you should be fine. Most DVD players will play PAL and NTSC.

[NecroWulf]

Well now, seems I have a plethora of experimenting info to go on.
Give me some time to try each of your ideas, I'll report back as soon as I have an opportunity...I'm at work!
Incidentally HillJack, I looked into the 'Field-order', and tried to adjust TMPGEnc as closely as possible to source, the results looked good!
Now, I have to deal with the 'blocky imagine issue' that so many have reported having went encoding to MPEG-1.

I'll report back soon,
-Necro

[DJSR]

HillJack & Neruwulf,

i tried the field order and find it very difficult to see if there is any difference while forwarding the movie in Deinterface, but i havent tried it in encoding yet!

I'm still a newbie to this, but am learning very fast! 8)

more posts would be appreciated and in more detail, thanks!

[3ff3kt]

DJSR- just now i started a topic to this issue and necro wolf directed me to this...my last try i did was put my settings from noraml to high quality and my movie is much smoother/...but i stopped encoding it at 10 seconds...anyways tonight i will encode it overnight since it takes almost 3 hours..and i hope this topic helps a lot of people.

[DJSR]

Thanks for the info 3FF.....i already no this info, but thank for posting if for other people to see!! nice one!!

cheers

DJSR

[bdmiller]

Help! I am experiencing similar problems. I don't seem to have any trouble encoding the mpeg from the avi with TMPGEnc. The new mpeg file plays beautifully on my PC, but when I burn it to CD using VCDEasy and play it on my DVD player, I get the frozen screens, and 'blocky' artifacting. I have not tried deinterlacing, but wouldn't I see the problem in the mpeg if that were the case? I have already encoded at best quality, so that is not the issue. The source avi is NTSC 29.97 fps, and I am not changing it in the mpeg. Any ideas?

[DJSR]

Hi bdmiller........i know where ur going wrong!!

1. Where are you from? Does ur DVD player play NTSC & PAL or just one of them?

2. by the sounds of it, its PAL, so when converting to mpeg, change the FPS to 25 !!!!! NTSC is 29!! 8)

3. for ultra smooth playback and great quality, change from normal to high quality conversion!! This is very important if you want smooth playback!!! Only drawback with this is the conversion time takes much longer!!!

I hope this info helps you out, as i'm sure it will!!

DJSR 8)

[bdmiller]

No, I have a NTSC DVD player that plays other VCD's fine, and I am already converting from avi to mpeg at the highest quality. I have smooth playback of the mpeg on my pc but when I burn it to cd it gets choppy. I am using VCDEasy to burn the VCD, and I had to instal ASPI drivers to get it to work. Could the problem be with these drivers? Any insight that anyone could provide would be greatly appreciated.