Is TMPEG a good mpeg2 encoder?

[perdomot]

I tried encoding some vobs to SVCD MPEG2 and when I burned it to DVD I noticed a certain amount of jitter on the video. I burned it with TMPEG DVD Author and then with Nero as data and the jitter was still there. I then used DVD Shrink & DVD Decrypter to burn directly to DVD and that came out fine. Does anyone know what can cause this jitter? I encoded to 720 X 480 so I was thinking maybe going to 480 X 480 would fix this. The odd thing is that when I view the movie on the PC, it looks fine, really smooth. Was it my encoder or the resize? Thanks.

[Blazey]

Just a guess, but if it looks good on the PC and not the TV it may be an interlace issue. Are you encoding interlaced?

[bugster]

Is TMPEG a good mpeg2 encoder?

The answer to this is yes.

Some setting somewhere is wrong, field order may well be. Other possibility is that you are inadvertently cahnging the framerate between the source file and the final output file.

What is oyur source material, DVD? If so is it film, full NTSC or PAL.

[perdomot]

My source is the vobs I ripped from a DVD. I believe the source said FILM on DVD2AVI. I didn't change the framerate. Its still at 29.97. On the TMPEG I did select the Highest setting in the Motion Search Percision thinking this would improve pic quality. Normally I leave this on the Normal setting. Not sure if this is a factor.

[bugster]

I believe the source said FILM on DVD2AVI. I didn't change the framerate. Its still at 29.97.

Film is 23.97 fps with 3:2 pulldown flags embedded.

[perdomot]

Well, I ran some tests including changing the framerate and resizing to 480 X 480 but the mpeg2 still jumped a bit although it was better than before. When I encoded to mpeg1, all the problems went away. Looks like its the mpeg2 encoder in tmpeg that isn't doing so well. Are there any progs out there that let me encode to mpeg 2 and control the vid/audio bitrate?

[bugster]

When you encode to mpeg-1, it becomes de-interlaced (mpeg-1 does not support interlacing). If that makes your jitter problem go away it suggest the problem may well be field order.

[freebird73717]

Take your mpeg2 file and demux it. Then download and run restream. Check the box that says top field first. Run restream ....after it is finished remux/multiplex the file back together. This should solve your field order problem.

[stevendm]

This sounds exactly like a problem that I am having. I already have the mepg2 file authored onto a DVD. I have a 4 gig file that has been split into 4 vob files by the authoring program. Can I take each vob file, convert it to a mpeg2 file and then restream it? Or do I have to combine these back into one big mpeg2 file to do the restreaming?

Thanks

[freebird73717]

I have never used restream after authoring the disc. I always keep the original mpeg file on my hard drive until after I have watched the disc to make sure of no errors. If I find any errors I always have the original file to fix/work with. ....If i had to I would load the 4 vob files in an app like mpegvcr and save as one big mpeg2 file. Then demux to elementary streams (video and audio). Let restream fix your video then mux the new video with your audio. Then author your dvd with your new mpeg2 file.

Good luck!

[perdomot]

Freebird,
So if I encode with TMPEG and make sure the field order selected is the top one, this would have the same effect as your solution?

[mikesbytes]

480 * 480 is not a DVD resolution, perhaps you ment 352 * 480.

Don't assume that it is top field first. this depends on you source. Check this site for one of those programs that tells you what your source file is (Called something like gspot, sorry brain doesn't work so well at 12.45am.)

[freebird73717]

Freebird,
So if I encode with TMPEG and make sure the field order selected is the top one, this would have the same effect as your solution?

I'm pretty sure Tmpgenc's default setting field order B. You could reencode using field order A...but restream only takes a couple minutes to run versus hours to re-encode with tmpgenc.

[perdomot]

I tried to dl restream but the source file is corrupted. Any other sources?

[Matt D]

I am also certain that this problem is due to your field order and not due to the encoding abilities of TMPGenc. I have used TMPGenc for years now and this program works incredibly well once you learn what you are doing.