burned dvds frames per second look low but arent

Discussion in 'Video playback problems' started by errMMK, Mar 18, 2006.

  1. errMMK

    errMMK Member

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    i have a 23 frame per second anime episode burned onto a dvd wich i burnt off my computer and when i play it, it dosent look smooth at all. by NOT smooth i mean when the camera zooms out or in or side to side i see the frames flash by like a slide show and it looks awful... of coures sence its anime its not really a camera but i dont know how els to explain it. anyways when i play the file on my computer it DOSENT look like a slide show it looks pretty smooth... smooth enough anway. when i burn the dvd it is set to high quality, NTSC(30 FRAMES PER SECOND!!!!!! MORE THAN THE MOVIE FILE HAS WHILE ITS ON THE COMPUTER!) sorry about the yelling i want to make sure nobody answers my problem by saying something about burning with more frames per second.. so im pretty sure frames per second isent the problem and i researched myself and found out that TV braodcasts with 60Hz and 30 frames per second, and i also found out Hz means refreshes per second, and that having 2x as many Hz as frames per second makes it look smooth. yeah double as many Hz as frames per second. so i was wondering if anybody knew of a program that you can make DVDs with wich allows you to change Hz and frames per seconds manually so you can match them up for a better smoother look. OR if anybody knows of another way to burn movies onto dvds with a smooth look. also just to point out the quality, and the frames look very great, and definition thats no problem its getting the frames to all flash by smoothly that is the problem.


    thanks for reading threw my crappily blobed problem, i hope somebody can understand it and help me.
     
    Last edited: Mar 18, 2006
  2. philraz

    philraz Regular member

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  3. errMMK

    errMMK Member

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    thanks for the reply, but with 23 frames per second on my computer it looks great and when i burn to dvd with 30 frames per second then it starts to look bad so i highly dobt its frames but ill try the program anyway.
     
    Last edited: Mar 25, 2006
  4. celtic_d

    celtic_d Regular member

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    The DVD should be 23.976fps to, just with a 3:2 pulldown flag so that it displays as 29.97fps.
     
  5. errMMK

    errMMK Member

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    umm i currently only have nero to burn and it gives me few options... quality, frames per second, aspect ratio, and encoding. it also only gives me a few optioins under each tab like under frames per second it just says NTSC, and a few other things im not sure of, and fast or slow encoding, aspect ratio of 4 : 3 or 16 : 9... i would need a better program, more advanced and i herd that if you change frames per second you also need to change the Hz and this and that and the bitrate and i really dont know how to balance it all out or much about the things, and will probly be left with it even more shitty if i dont balance it correctly? well if anyone who burns dvds decently wants to show me how they do it and all the junk i need to apply and the program they use id be grateful. also if i herd rong on having to balance out all this junk, complicated like, let me know.

    err and im going to stick in these 2 paragraphs from an article at at some point it says 24 frames per second is in movies and works good due to the darkness in the theater but increasing to 30 is better on tvs due to the usual lighting of the home environment blahblah... and it says something about hz being 2x as much as frames giving a smoother look and god damn this is confusing because if i were to have 24 frames a second with 48 hz a second according to him sence its double would be smooth but then according to him 30s better for the lighting or someshit... RAAAAAAAAAAAAA whats going on......... anyway ERRRR i guess that dosent mader if one of you knows how to make a quality smoothlike dvd just let me know how please.

    http://joz3d.net/html/fps.html#tvdvd

    30 vs. 60 Frames Per Second
    A Technical Overview
    by Joshua Walrath (1998)


    Movies
    I have seen film students write in to columns about how anything over 24 fps is wasted. Why 24 fps? Movies in theaters run at 24 fps. They seem pretty smooth to me, so why would we need more? Well, let's take a look at movies from the eyes' perspective.

    First off, you are sitting in a dark movie theater and the projector is flashing a really bright light on a highly reflective screen. What does this do? Have you ever had a doctor flash a bright light in your eye to look at your retina? Most of us have. What happens? A thing called "afterimage". When the doctor turns off the bright light, you see an afterimage of the light (and it is not real comfortable). Movie theaters do the same thing. The light reflected off the screen is much brighter than the theater surroundings. You get an afterimage of the screen after the frame is passed on, so the next frame change is not as noticable.

    Screen refresh is also a very important factor in this equation. Unlike a television or a computer monitor, the movie theater screen is refreshed all at once (the entire frame is instantly projected and not drawn line for line horizontally as in a TV or monitor). So every frame is projected in its entirety all at once. This then leads back to afterimage due to the large neurotransmitter release in the retina.

    Perhaps the most important factor in the theater is the artifact known as "motion blur". Motion blur is the main reason why movies can be shown at 24 fps, therefore saving Hollywood money by not having to make the film any longer than possible (30 fps for a full feature film would be approximately 20% longer than a film shown at 24 fps, that turns out to be a lot of money). What motion blur does is give the impression of more intervening frames between the two actual frames. If you stop a movie during a high action scene with lots of movement, the scene that you will see will have a lot of blur, and any person or thing will be almost unrecognizable with highly blury detail. When it is played at full 24 fps, things again look good and sharp. The human eye is used to motion blur (later on that phenomena) so the movie looks fine and sharp.

    TV, Video Tape, and DVD
    TV's run at a refresh rate of 60 Hz. This is not bad for viewing due to the distance we usually sit from the TV, and the size of the phosphors on your average set and the distance between phosphors (between .39 for a high end one, to .5 and higher for cheaper models). This is actually quite big and fuzzy for most of us, but as long as we are not doing any kind of productivity software (such as word processing) and just watching movies at least 6 feet from the TV, that is just fine.

    Now TV transmissions, video tape, and DVD play at 30 fps. The increase from movies is due mostly to the environment that the TV is watched in. It is usually quite a bit brighter than in a movie theater, and most importantly a TV does not do a full screen refresh, rather each frame is drawn line by line horizontally by an electron gun hitting the phosphors in the screen. So basically each frame is drawn twice by the TV (60 refreshes per second, 30 frames per second). Now because the frame rate is 1/2 the refresh, transitions between frames go a lot smoother than if you had say a 72 Hz refresh and a movie playing at 30 fps. Don't ask me why, it is due to wave behavior, which is higher level physics, and I can't go into that without making this a 30 page paper. Needless to say, the physics behind this make video and DVD look very smooth.

    Motion blur again is a very important part to making videos look seamless. With motion blur, those two refreshes per frame give the impression of two frames to our eyes. This makes a really well encoded DVD look absolutely incredible. Another factor to consider is that neither movies or videos dip in frame rate when it comes to complex scenes. With no frame rate drops, the action is again seamless.


     
    Last edited: Mar 25, 2006

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