DVD to SVCD video not quite right

Discussion in 'MPEG-1 and MPEG-2 encoding (AVI to DVD)' started by genemc, May 27, 2005.

  1. genemc

    genemc Member

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    I used the DVD to SVCD with TMPGEnc tutorial on this site. It fixed my audio sync problem. However, when there is relatively fast motion on the screen, every other line on the object in motion (example a person's body when walking) seems to be offset and pixelated. Once the motion slows down (stops walking) the video seems to be fine. My video is 16:9, 29.970, and interlaced.

    Any ideas?

    Thanks.
     
  2. Minion

    Minion Senior member

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    This sounds Like an Interlace Issue...Are you seeing this on your Monitor or on your TV set?? Because Interlaced Video will allways look that way on your PC"s Monitor because PC Monitors do not display Interlaced Video properly....

    Also if you are Ripping a DVD and converting it to SVCD and did it Properly you would have ended up with a SVCD File with a Frame rate of 23.976fps (Maybe with 2:3 or 3:2 pulldown) and when done this way there is no chance of Interlace Problems....

    Did the Method you used entail useing "DVD2AVI" to make a ".d2v" frameserver file to frame serve to Tmpgenc?? If so did you select the "Forced Film" option in DVD2AVI before makeing the ".d2v" file??

     
  3. genemc

    genemc Member

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    The original DVD was 16:9, 29.970, and interlaced. My TMPGEnc settings were 2 pass VBR and non-interlaced. I just viewed the mpg using PowerDVD and it looked weird.

    I did not use Forced Film on DVD2AVI. I'll try that right now.

    Thanks.
     
  4. Minion

    Minion Senior member

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    Most Retail DVD"s are Made from Film which is Shot at 23.976fps(24) so to make this 23.976fps Progressive Film Footage DVD Compliant (29.976fps and Interlaced) they add what is called "3:2 Pulldown" which Splits some of the Frames up into Fields and uses combinations of Fields from different Frames to make up the extra Frames to make the Footage 29.976fps and Interlaced...

    So what the "Forced Film" option in DVD2AVI Does is it removes the 3:2 Pulldown which converts the Footage back to it"s 23.976fps Progressive State....(You can only use the "Forced Film" option on Movies that were originally shot on Film, You can tell if it was shot on Film when you are createing the D2V file the Statistics window will say "Film" or "99% Film" , If the Movie was Not Shot on Film the Statistics window will say "NTSC" instead of "Film")

    When you encode the File with the "Forced Film" option enabled make sure you select the "NTSC Film" Template Or if not useing a Template then make sure that the "Encode Mode" is set to "3:2 pulldown When Playback" and the "Frame Rate" is set to "23.976fps(Internally 29.976fps)".....

    Now when you encode the File useing these settings you should not get any Interlace artifacts in High Motion scenes.....

    Cheers
     
  5. genemc

    genemc Member

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    Well I reran DVD2AVI and it is NTSC interlaced so I guess forced film won't help me. Could it be that I have FILM but it showed NTSC? I think I'll go through and try the forced film and see what happens anyways.

    Thanks.
     
  6. Minion

    Minion Senior member

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    If the Video Type is NTSC Interlaced then do not use the Forced Film option But Rather when you are encodeing in Tmpgenc go into the Advanced settings and double click the "De-Interlace" Filter and Try one of the De-Interlace filters and see if that helps your Problem....

    Cheers
     
  7. genemc

    genemc Member

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    OK. I'll try that. I think I looked at it earlier but didn't actually select a filter.

    Thanks.
     
  8. genemc

    genemc Member

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    Perfect. That looks like it worked great for an interlaced clip. Now if I have a FILM (progressive) clip using TMPGEnc, then I guess I should use 3:2 pulldown on the advanced tab. Do I still have to Deinterlace? The Encode mode is forced to be 3:2 pulldown when playback.

    Thanks.
     
  9. Minion

    Minion Senior member

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    Hi, If you have a Progressive Film 23.976fps Clip then you encode it with the "encode Mode" set to "3:2 Pulldown When Playback" and set the Frame Rate to "23.976fps(Internally 29.976fps)" and you do Not need to use the De-Interlace Filter as with 3:2 Pulldown you will not see Interlace artifacts when viewed on your TV set....

    Cheers
     

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