jerky playback from MPEG?
 

I did a search in the forums and i couldnt get any posts with a similar problem to mine. i used the kdvd template from this site and i converted an avi without audio to m2v. the changes i made were
1. motion estimate search(fast) (to speed up the encoding)
2. aspect ratio (1:1) vga bcoz i didnt want it in widescreen i wanted it as regular full screen with aspect ratio maintained

i have no complaints about the quality and i also joined the m2v with audio from the divx that i converted to ac3 but i had jerky playbak from when i got the m2v. is it bcoz i changed motion estimate or bcoz of the aspect ratio ?

i tried the vdo first in my pc with bsplayer, windvd, windows media player and winamp5 and then on my xbox and i get jerky playback, it kinda gets annoying after a while. any tips ?

You probably encoded at a different frame rate than your source.
What's your source frame rate :?:

-kwag

source frame rate of the divx is 23.976 ntsc
kdvd template 23.976(internally 29.97) <-- i didnt change that

bump

Did you get jerky playback on the Xbox only :?:
Or did it also jump on the software players :?:

everywhere kwag..every software i tried on pc it was jerky and so to make sure i played in my xbox bcoz the xbox media player usually plays everything flawlessly but it was jerky there too. :?

Try another source :!:
I think your problem is the file you encoded.

-kwag

i doubt the source is the problem bcoz last week i used tmpgenc to convert the same divx to dvd and the file was around 4.1 gb and it didnt jerk at all. but when i tried kdvd it bcame jerky, i wonder if changin the motion estimate thing had anything to do with it..

What authoring program did you use :?:
Have you tried TMPGEnc DVD Author :?:

I had problems before when authoring with 3:2 pulldown flag.
With TMPGEnc DVD Author, all my KDVDs work fine.

Also, how did you multiplex your .m2v and .mp2 audio :?:

-kwag

i didnt author the kdvd file i made, i use tmpgenc dvd author to author my dvds.

to join the m2v and mp2 i used mpeg tools and then multiplex to join the audio in tmpgnec but the jerkiness was there before i joined audio. i checked the vdo right after it was created and it was jerky. since it was jerky from the start i didnt author it to a dvd.

Then the only thing I can think of, is your output aspect ratio :!:
Encode a small clip, letterboxed, and set the output to 4:3.
See if it still jumps.

-kwag

k im tryin it now..

great, i made 2 samples one at 1:1 vga and the other at 4:3 and neither of them jerk now 8O now im confused.

So am I :lol:
Maybe it's something you did in your previous encode.

-kwag

hey kwag i think i got the problem. the first encode runs fine as long as i let it play from the beginning...as soon as i fast forward and watch it starts being jerky. now i wudnt want that on my kdvd when i play it on my dvd player so is there any remedy to this ?
p.s. 4:3 created smaller file i think i'll do that from now on :wink:

Your KDVD is as compatible as any other MPEG-2 encode, but smaller in file size.
There are no known incompatibilities with KDVDs on any standalone player.
Maybe your player doesn't like open GOP :?:
Try closing it on the template, encode again, and try it on your player.

-kwag

are u talking about checkin the 'output bitstream for edit(Closed GOP)' option in GOP structure ? I noticed a slight blur in the kdvd...anyway to improve that or do i jus play around with cq to figure that out ?

Yes.Read about "File size prediction" in the foeum.

-kwag

damn dude i jus tried to make a sample from another divx movie and..shit its jerky, the first movie was still fine this one is jerky jerky jerky lol by the way does the k in kvcd and kdvd stand for kwag ?

jus wanted to say that im havin problems with my matrix 2 divx, no matter what i try the kdvd sample turns out jerky. any idea on how to fix this ? i dont get any more jerky kdvds now thank god but this one is being a b*tch. :x