VideoHelp Forum




+ Reply to Thread
Results 1 to 6 of 6
  1. I've been converting a few avi's to dvd's recently. When watching some of them, the video occasionally seems to stutter, or speedup and slow down - only happens for a split second and audio is fine. I think it only happens when the source avi is 24(23.9) fps. I'm using TMPGEnc to do the conversion.
    Does inverse telecine or 3:2 pulldown do anything that would affect this as when I select "video film" as the source, tmpgenc sometimes checks the inverse telecine box - what do these options do ?

    Whilst I'm here - is it best to convert 24fps avi's into 24fps DVD's & if so, do any special boxes need checking ? Or is it automatic in tmpgenc ?

    Paul
    Quote Quote  
  2. Member
    Join Date
    Dec 2001
    Location
    Sydney, Australia
    Search Comp PM
    The main sympton when you encode video in 24fps and your DVD player thinks it is 30 is this jerky sped up action.

    However, I live in wonderful PAL 25fps only land, so I've never needed to backup the rare NTSCFilm DVDs that we have here. But I'll try to help.

    Looking at TMPGEnc, it doesn't provide a NTSCFilm DVD Template, so you'll have to create one.

    To leave it as 23.976fps which is better because you get a progressive film and a better share of the bitrate, you're best going through the wizard and doing what you'd normally do but just make sure when you come up to the 'Select Source File' window you select 'video type' as "Non-Interlaced" and 'content of video' as "Film Movie". Don't Encode the movie straight away (untick that option at the end of the wizard). Then make sure that under 'Settings' and 'Video' TAB your 'Frame Rate' is 23.976, the 'Encode Mode' is '3:2 pulldown when playback' and under 'Advanced' TAB the 'Video Source Type' is progressive.

    Info on 3:2 Pulldown:

    http://www.projectorpeople.com/tutorials/pulldown.asp

    This is the way I understand it. As I have no video to test this out , maybe someone can confirm or deny this, if not I'd just give it a try.

    Then do everything you do as normal from then on, tweak settings etc., then try encoding, authoring and burning.

    GOOD LUCK!!!
    Quote Quote  
  3. Good, i'm not the only one with this problem... I tried revering the fields which helped a little but did not get rid of the problem.
    Quote Quote  
  4. Member
    Join Date
    Dec 2001
    Location
    Sydney, Australia
    Search Comp PM
    Reversing the 'Field Order' for the Video Source if the Video Source is Progressive should have no effect. But has every effect in the world if it is Interlaced.
    Quote Quote  
  5. Plastic - what codecs you using - I've got the ace mega codec pack.
    I found that selecting the "inverse telecine" helped a lot, but not 100%. Although why I don't know as the source is already 24fps, so why selecting an option that says "convert to 24fps", should it make any difference ?

    I've tried variable bit rate, hi quality encoding, saving sound as mp2 seperately, then encoding. Will try removing codecs tomorrow if I get time.

    Oh - Never tried first suggestion yet - I'll try that tomorrow too (I only just read all replies - thx).

    Paul
    Quote Quote  
  6. I think you encoded wrong. Since your source is AVI, letterbox it properly, DO NOT DO IVTC. Encode with the 3:2 pulldown flag and voila!. The video is 23.976 physically but the 3:2 pulldown makes it playback at standard NTSC while looking the same as its 23.976 source. If you didn't do the IVTC at encode time, all you need to do is get a program that will modify the file to have the pulldown flags, such as the program Pulldown . If you want a GUI to do it, I don't remember what I used, but hey, Pulldown is pretty simple CLI.

    On a side ntoe, I wish the whole world would just god damn adopt PAL! More colors, higher res, 1 framerate! Stupid Americanos.
    My AVI -> Any Format Guide is available here.
    My Frame Resize Calculator (enhanced for Virtualdub) is available here
    Quote Quote  



Similar Threads

Visit our sponsor! Try DVDFab and backup Blu-rays!