Choppy Conversion...?

[Desperate Jip]

Hi ppl, I have looked on the forum for a solution to my problem but seem to have gotten more confused. I converted the following avi file with TMPGenc, in the hope of making an SVCD (PAL) to play on my Stand Alone Player...

File : 708 MB (708 MB), duration: 1:35:09, type: AVI, 1 audio stream(s), quality: 62 %
Video : 621 MB, 912 Kbps, 29.970 fps, 720x304 (2.21:1), DIV3 = DivX v3 MPEG-4 (Low-Motion), Supported
Audio : 87 MB, 128 Kbps, 48000 Hz, 2 channels, 0x55 = Mpeg-1 audio Layer 3 (MP3), Supported

...I then Burnt the 1st half to disc and when i played it, the audio waz fine but the video waz quite choppy so i am hoping some one can point out ne poss reasons why this might have happened and how i could sort it out.

Thx in advance.

[Devanshu]

Use this principle..."if you put s*** in..you get s*** out". If your source was crappy to begin with, then you're not going to have much luck with quality.

[Gees]

Sometimes you get "choppy" looking video if you've (accidentally) swapped the original field order.
You gave lots of info, which is great. :c) But do you know if it was frame-based or field-based? Maybe that's the hitch. :c)

[Don2050]

I've noticed alot of the choppy issues relate to running (or lack thereof) a pulldown on the video.

You may need to set the pulldown flag in TMPGenc...though for SVCD I am uncertain.

Do a general forum search withe the word 'jerky' or 'choppy'.

This guy deals with it in his guide https://www.videohelp.com/forum/userguides/131154.php under Inverse Telecine - also named 3:2 Pulldown

[Devanshu]

You gave lots of info, which is great.

Very ture...usually people just post and expect people to guess.

[Don2050]

Yeah..I noticed his thoroughness....I am guessing he is a tech-head of sorts.

[Desperate Jip]

Thx alot folks for your replies, i tried them but sadly they havent sorted my probs out (though i am very greatful all the same). The thing i seem to have noticed (prob quite obvious to most) is that when converting from PAL .avi > PAL .mpg(SVCD) i do not have any probs. Its only when converting from NTSC .avi > PAL .mpg that the prob with chop arrises. i also noticed that when i converted from 23.976 > 25. the chop waz less noticable than from 29.970 > 25. (this is, im assuming, coz the framerates where closer)...but ...well..erm chop is chop and i desperately want to get rid of it. I did read this guide... https://www.videohelp.com/forum/userguides/78178.php ...but found it a bit vague, eg. it says to select "video only" but there are 2 "video only" settings in TMPGenc - ES(Video only) & System(Video only)....so i didnt get very far. Here is another avi file which turned out choppy (though not as much as the previous one in this topic):

File : 701 MB (701 MB), duration: 1:27:59, type: AVI, 1 audio stream(s), quality: 43 %
Video : 620 MB, 986 Kbps, 23.976 fps, 512x384 (4:3), DIV3 = DivX v3 - MPEG-4 (Low-Motion), Supported
Audio : 80 MB, 127 Kbps, 48000 Hz, 2 channels, 0x55 = MPEG Layer-3, Supported

If i understand things rightly then what i need to do is...
a) seperate the video from the audio
b) convert the video from 23.976/29.970 > 25.
c) stretch & pitchshift the audio.wav (previously extracted) to match the converted video -with cool edit 2000 (which, as i aint got this far, havent used yet)
d) hopefully put them back together

Hope i have covered as much as is needed....Plz,Plz, could u help me
Thx in advance

[Don2050]

Not sure if you went through these guides yet....but here are some NTSC/PAL coversion guides

https://www.videohelp.com/guides.php?howtoselect=4;41

For 23.976 Fps you dont have to do a frame rate conversion....you just put pulldown flag in it and an NTSC dvd players will automatically do the conversion. I am not sure if PAL dvd players are the same though....maybe one those guides up above will explain it.

[Desperate Jip]

Thx Don, I am hoping to make a PAL (SVCD) from my NTSC.avi source so if i do the "Pull Down" thingy, will this work in my case....soz bout my lack of confidence ...thx