Finding out the FPS of NTSC DVD???

[Xzost]

Hi,


I was just wondering if there was a way to find out the FPS (23.97 or 29.973) OF AN ntsc DVD. Either that or from the VOB files when creating a d2v project.

Thanx in advance guys!

Xzost

[sterno]

In DVD2AVI make sure "force film" is disabled and hit F5 for a preview. Let it run for a while, you don't have to let it run all the way through but let it go for at least 5-10 minutes in to the movie. The status window will say either NTSC or FILM, with or without a percentage. If it's just NTSC, it's 30fps. If it's just FILM, it's 24fps. If it shows FILM with a very high percentage (or NTSC with a very low percentage) it's probably 24fps with the studio logo at 30fps and you can probably treat it as 24.

[poopyhead]

In DVD2AVI make sure "force film" is disabled and hit F5 for a preview.

in terms of dvd2avi's info box, force film only alters the stated fps (if you force film, the fps in the info box will be 23.976, no force film will be 29.97 fps) since this has nothing to do with the DVD source, i don't understand why force film has to be off before previewing.

keep in mind that NTSC is always 29.97 fps on playback.

[Xzost]

well. I did what u said sterno, but in the status box, it says 29 fps, but for video type it says film, and I thought film was 23.97 fps...

So, if this is the case, do I choose to force fps to 23.97 fps if its film when making d2v file?

thanx for the help

Xzost

[poopyhead]

well. I did what u said sterno, but in the status box, it says 29 fps, but for video type it says film, and I thought film was 23.97 fps...

like i said in my post, the fps stated in the status box reflects whether you enabled force film or not...it does NOT indicate the fps of the DVD...hence, that's why i asked sterno why he told you to disable force film when previewing, when it doesn't really reflect the fps of the DVD

i.e. if you enable force film, the fps stated in the status box will be 23.976, regardless of whether the DVD is FILM or NTSC

if you disable force film, fps stated will be 29.97 fps, again regardless of whether the DVD is FILM or NTSC...

basically, if the video type, as stated in the status box, is FILM or majority FILM (i.e. 90% or greater) you should force film when making your .d2v project file. (basically ignore the fps in the status box and concentrate on the video type...also, frame type should be progressive)

[Xzost]

thanx poopyhead

well, I encoded a dvd that was FILM (according to dvd2avi) using 29.97FPS setting and the output came out fine. Maybe I got lucky, but it didnt; seem to matter that the film was in FILM, cuz I went ahead and used 29.97 FPS neways

any thoughts?

Xzost

[poopyhead]

enabling force film (i.e. encoding at 23.976 fps + 3:2 pulldown in tmpgenc) will usually yield better quality than disabling force film (i.e. encoding at 29.97 fps + interlaced in tmpgenc)

you should try enabling force film and compare the quality to when u disabled it...it should be much better

[Xzost]

Hmm, interesting


I never new what 3:2 pulldown was, care to explain?


Thanx for the advice once again, been a great help

PS thanx for fast reply

Xzost

[poopyhead]

NTSC must be played back at 29.97 fps...so if u encode at 23.976 fps, the 3:2 pulldown will add frames to make it 29.97 fps during playback

[sterno]

Yeah, I guess it shouldn't matter if force film is on or off. I thought I had some trouble with it in the past, but I was probably just drunk or something.

[Xzost]

ok, so in other words, we enable 3:2 pulldown whenever we have a NTSC FILM movie? so we should automatically think, ok I have a FILM, so enable 3:2 pulldown? or are there instances where we do not?



Xzost

[poopyhead]

i don't think so....to my knowledge, NTSC has to be played back at 29.97 fps..

so either you encode at 23.976 fps + 3:2 pulldown or 29.97 fps + interlaced