FPS question...

[Krawk]

Hey all, have another question about ripping/converting regarding fps.
You can skip the scenario below if you wish - does Makemkv have any determination of the framerate of the source video or chapter marks, or is it plain and simple a 1:1 copy? Or couldthere be an error in the process?

Let me lay out the scenario.
Movie title: A Nightmare on Elm Street, dvd, USA region 1

MakeMKV creates an MKV file that reports at 29.97fps and does appear to play correctly via VLC or MPC, and the chapter marks also concur between real disc and mkv file.

DvdFab, whether it is encoded H264 or using their "passthru" method which is supposed to just copy the data is reporting 23.976fps. Both resulting files have a Macroblocking situation at the chapter 12 mark. The chapter marks in Dvdfab are not in the exact spots as they are in Makemkv/real disc.

Feeding the MakeMKV file into Dvdfab converter to encode h264 results in dvdfab frequently crashing, it took six attempts to get a working file.

To me 30fps seems like it is a tv video and not a film video, so is it possible that I am seeing a problem with both programs in some way or another? Are most dvd discs produced at 30 or 24 fps?
VLC + MPC do not tell you fps when playing the actual disc.

[Woodstock]

The base-line video is usually 24fps (the 23.97 you saw), with flags to duplicate frames every so often to simulate 30fps (29.97). This is called "telecine". You can also have interlacing in there...

MakeMKV is doing a straight copy - so the FPS is going to be whatever the file reports itself as, or what the player decides to interpret it as.

When I process a DVD in handbrake, I tell it to use the same FPS as the original, with removal of telecine and interlacing. That USUALLY results in a 23.97fps rate. For BD, I can usually skip the telecine/interlace removal, and still end up with 23.97.

But there are some manufacturers out there putting out telecined, interlaced blurays.

[Krawk]

When I process a DVD in handbrake, I tell it to use the same FPS as the original, with removal of telecine and interlacing. That USUALLY results in a 23.97fps rate. For BD, I can usually skip the telecine/interlace removal, and still end up with 23.97.

But there are some manufacturers out there putting out telecined, interlaced blurays.

Thanks a bunch. I have just purchased MakeMkv as I feel this is a valuable program and this forum is useful.

So is it not true though that de-interlacing a file reduces the resolution/detail level though?
As much as I use Handbrake I am generally not happy with the lengthy time it takes to convert a file, and it also does not carry over the subtitles. I realize this is not a Handbrake forum, if I may ask though, what is considered a sane setting for handbrake to where the picture quality is not altered by any noticeable amount.

[Krawk]

Processing the above file thru Handbrake, autocrop enabled produces a file that is reportedly 23.976 fps, but the resolution is showing 720x466. Huh?!?
The original cropped file is 720x404.

[Woodstock]

De-interlacing is done a few different ways to deal with motion. You really only have full resolution in a still image made out of two half-frames, but those two halves are not necessarily from the same moment in time. Lots of magic that you can find out more about over on handbrake.fr.

Of course, you also lose a lot of information when you have a wide-screen DVD. Anamorphic and other things come into play. But those things are best discussed over at forums.handbrake.fr, because that's where the experts are.

[Krawk]

De-interlacing is done a few different ways to deal with motion. You really only have full resolution in a still image made out of two half-frames, but those two halves are not necessarily from the same moment in time. Lots of magic that you can find out more about over on handbrake.fr.

Of course, you also lose a lot of information when you have a wide-screen DVD. Anamorphic and other things come into play. But those things are best discussed over at forums.handbrake.fr, because that's where the experts are.

handbrake's site with reference to encode settings, decomb, deinterlace has not been updated since 2011. I am also seeing many conflicting answers out there. So the million dollar question si really, what works? Waiting for results 2 hours later does not obviously.

[Woodstock]

Personally, I use decomb/Default for interlaced sources. But I turn both detelecine and decomb if the source is Bluray.... EXCEPT if it's from NISAmerica, which likes to do interlaced BDs.

Oh, no need to wait for a full encode to check things - encode a short section with different settings, and see what works for you. Pick something with motion in it.

[Krawk]

Oh, no need to wait for a full encode to check things - encode a short section with different settings, and see what works for you. Pick something with motion in it.

Maybe it is more about general usage. Example, Jack Frost 2 might have a clearly interlaced segment at the beginning of Chapter 7. So, I ask Handbrake to sample me a setting with Chapter 7 as the starting point, but it decides to ignore my request and starts at 00:00:00 at the beginning of the film.

[Woodstock]

Support for handbrake is best done over on forum.handbrake.fr, since that's where the experts are. Usually, though, if you tell it to encode "from chapter 7 through chapter 7", you'll only get chapter 7 in the output.