Converted Files To DVD Format Stutter ?!?

[Umbrella420]

Hey i've noticed that all the movies i've watched ,from burning them from my PC, i've noticed the video stutters every second ever so slightly.
At first i thought it was the disc or my disc drive itself but i opened the converted folder in VLC and noticed i got the same stuttering.
It only happens when im converting to DVD format (the vob, bup & ifos files) and it happens with every convert i've tried.

Anyone know of any solutions?

Thanks in advance

[jagabo]

23.976 fps source to 25 fps DVD? That's a likely cause of a small jerk every second as the 24th frame is repeated to make a 25th frame. The proper way to make this conversion is to speed the video up to 25 fps and reduce the audio length by ~4 percent to compensate.

[Umbrella420]

Okie dokie
Im using the latest version of Winavi Converter at the minute but i can't see an option to change the fps, is there any programs as fast as Winavi in which i can change the fps to 25 with?

[guns1inger]

ConvertXtoDVD or AVStoDVD. Neither is probably as fast as WinAVI (although ConvertXtoDVD probably comes very close) but both are far more reliable tools than WinAVI. AVStoDVD will give you the best quality.

[Umbrella420]

Ok well i remembered i had Aimersoft Video Converter (thanks i'll check those other programs if this fails ) so im currently converting a mp4 to DVD and it's set to 25fps with an estimated file size of 4gb so i can fit on DVD disc,
is this right?

[guns1inger]

Why are you converting them to PAL ? There is a very good chance that your player will play NTSC discs quite happily. You will get better quality conversions if you don't change formats.

AFWIW, Aimersoft Video Converter is a sh*t as WinAVI. I wouldn't install either of them on any computer I owned.

[Umbrella420]

I've took your advice and in using ConvertXToDVD, converting my file at 25 fps to DVD, and this should solve my problem right?
Im in the UK so PAL is the standard format here and i've been using it for the last 5 years or so now adn it's worked on every DVD play but thanks for the suggestion

[guns1inger]

Most PAL countries can also handle NTSC material - the UK, Australia etc. The only time I convert NTSC to PAL is when I have to mix the formats on the same disc. Otherwise I output PAL for PAL and NTSC for NTSC.

[jagabo]

Im in the UK so PAL is the standard format here and i've been using it for the last 5 years or so now adn it's worked on every DVD play but thanks for the suggestion

Yes, but most PAL players can play NTSC DVDs. I would try both then compare the two. See which you like better.

[davexnet]

Doesn't AVStoDVD do DGPulldown for 23.976 > 25?
Might give a better result than just repeating the one frame every second.

[guns1inger]

Both AVStoDVD and ConvetrxtoDVD use pulldown to get the framerate change

[davexnet]

I tried it in AVSoDVD (25 > 29.97) but the result when viewed on a traditional TV (CRT)
had a strange flickering visible on certain material. I've since given up on that,
and now do PAL > PAL as you mentioned earlier.
My 5 year old Samsung player does a pretty good job on the PAL>NTSC conversion.

Perhaps the OP will have better luck with this method than I did.

[guns1inger]

The pulldown method is a kludge. It is better than the patch method because at least the video has the correct resolution, but playback quality is at the mercy of the device applying the pulldown, and some do it much better than others. Also, using pulldown to go from 23.976 -> 25 fps is a much easier ask than going 25 -> 29.970 fps.

[jagabo]

The pulldown method is a kludge.

I don't think it's a kludge. It's simply using an MPEG feature a little differently than the usual DVD. The DVD spec doesn't say that only 23.976 fps with 3:2 pulldown is supported.

It is better than the patch method because at least the video has the correct resolution, but playback quality is at the mercy of the device applying the pulldown, and some do it much better than others.

In my opinion a player that doesn't handle pulldown flags correctly is defective. The whole reason pulldown exists is because players were once very dumb devices. They weren't expected to figure out how to convert from progressive frames to 59.94 fields per second analog video on their own. The pulldown flags are instructions that tell the player what order to play the fields and which fields to repeat. Many NTSC DVDs switch from progressive to interlaced frames and have many breaks in the 3:2 pulldown pattern midstream. So players must have flexibility in pulldown interpretation to play commercial NTSC discs.

Also, using pulldown to go from 23.976 -> 25 fps is a much easier ask than going 25 -> 29.970 fps.

I don't see how either is easier or harder -- especially for the playback device. They just follow the instructions:

24 -> 25 fps: 2:2:2:2:2:2:2:2:2:2:2:3
25 -> 30 fps: 3:2:3:2:2

And, of course, there has to be one additional field added every 1000 fields (ie, one of the 2s has to becomes a 3) to make up for the difference between between 23.976 fps and 24 fps, or one field dropped (a 3 becomes a 2) out of every 1001 to make up for the difference between 30 fps and 29.97 fps. But this is only "difficult" for the person writing the software that adds the pulldown flags. The player just follows instructions as usual.

To the OP: using pulldown flags to go from 23.976 fps to 25 fps will result in one very small jerk every half second (one field is repeated every 1/2 second). Compared to one small jerk when repeating 1 frame every second. The smoothest result (no jerks at all) comes from speeding the frame rate up to to 25 fps and adjusting the audio length.