How do I find out how many fps on a DVD?

[mjvgiese]

I'm backing up some of my dvds, and I'm using Sefy's DVD Backup guide (https://www.videohelp.com/sefy/?id=ClassicalGuide.html). What I need to know is how do I find out how many frames per second my DVD's have? I need to know before I can process them with DVD2AVI. Is there a program that tells how many frames per second a particular DVD has?

Any help is appreciated....

[mjvgiese]

Oops, I guess I posted too soon. I found out that DVD2AVI tells you how many frames per second your DVD has.
(For anyone else who might need to know this, load your file into DVD2AVI then click on Options and then preview.)

[dbecker]

watch what you say!! dvd2avi will always say 29.97 fps if 'force film' is off and 23.97 if 'force film' is on... the key to using dvd2avi is see if the type film says 'film'(of at least 95%) or 'ntsc' (which would be 29.97).. most movies are film.....

[RabidDog]

unless its Pal of course, then its 25fps

[mjvgiese]

I was just coming to this forum to ask another question on this topic, but since this thread is still active, I'll just post it on this!

I was starting to notice something odd about the way dvd2avi tells you how many fps a dvd has. But anyway, when I take my .ifo file into Chapter Extractor, it seems to say how many frames per second the dvd has. It this number correct? The reason I ask is because it seems to tell me a different fps than dvd2avi does, although that could be because I was reading it wrong in dvd2avi. Anyway, if the fps that Chapter Extractor tells me is right, I think it would just be easier to see how many fps on a dvd that way.

If anyone can tell me, I'd appreciate it!

[adam]

DVDs basically only have one of two playback framerates. As stated earlier, PAL is easy because it is always 25fps.

For NTSC the video can either be encoded at 29.97fps externally, or it can be encoded at 23.976fps internally and a flag can be embedded in the stream which instructs the DVD player to telecine it during playback to 29.97fps...since 29.97fps is the only supported playback framerate in the NTSC standard.

To see which category your NTSC DVD falls into you should preview it in dvd2avi. Scroll past the opening credits (which are almost always stored at 29.97fps) and set the start point, then start the preview. If it reads FILM then it is stored at 23.976fps. If it reads NTSC or says any % FILM then it is at least partially stored at 29.97fps and you should treat the entire stream as such.

With the exception of things like anime and tv episodic DVDs, almost all commercial NTSC DVDs are stored at 23.97fps. It is the industry standard because storing NTSC footage at 29.97fps is horribly inefficient.

So, for most NTSC DVDs you would want to enable forced film in dvdavi, which will allow you to bypass the pulldown flags and access the film as it is stored, as 23.976fps material. From there you want to replicate this structure on your output format. For SVCDs and DVDS you want to encode to 23.976fps and enable the 3:2 pulldown. For VCDs you should simply encode the output to 23.976fps. The hardware will do the rest.

[Sefy]

PS: Incase the source is not DVD but an AVI variant (DivX/Xvid) then I would recommand using GSpot to tell you the fps of the movie.