MeGUI Keyframe Interval

[fight2win]

for a dvd which is ntsc interlaced, what keyframe interval should be used in megui, 240 or 300, also, while bitrate calculation for such encodes, should it be 24 fps or 29.97 fps,megui shows some deinterlacing values...please help...

[Doom9]

the rule is 10x framerate, but it really doesn't matter much, since in most cases, keyframes will be set well before the interval has elapsed. We used to set it back in the DivX3 days because the SCD wasn't as advanced as it is nowadays, and to improve seeking (that, too, is not much of an issue anymore these days).. so the only situation where you should worry about keyframe intervals is if you have a certain hardware device that requires a certain maximum distance between keyframe intervals (e.g. DVDs have a strict maximum GOP size).

And you know there's two automated modes where you don't have to concern yourself with bitrate calulations, don't you? in those modes, megui gets the FPS from the final avisynth script (with whatever IVTC/deinterlacing or whatnot it may have added).

[StephenChow]

for a dvd which is ntsc interlaced, what keyframe interval should be used in megui, 240 or 300, also, while bitrate calculation for such encodes, should it be 24 fps or 29.97 fps,megui shows some deinterlacing values...please help...

According to http://www.doom9.org/index.html?/gknot-codecsetup-divx6.htm
"Keyframe Interval to 10 times the framerate of your video (250 for PAL movies, 240 for NTSC movies shot at 24 FPS (you're using Force Film or IVTC) and 300 for interlaced NTSC movies). But don't worry if you don't change this, this setting hardly has any effect."
Yes, you know x10 your framerate.
In your circumstance, your DVD NTSC Interlaced IVTC 23,976fps should be set 240 in MeGUI Keyframe Interval
Regards