MakeMKV reporting incorrect video parameters
Posted: Wed Nov 15, 2023 3:03 am
Apologies if this has been asked previously but...
Why does MakeMKV report the incorrect parameters for some video tracks?
For example, I just ripped the Director's Cut of "Lock, Stock And Two Smoking Barrels" (1998) from DVD and MakeMKV set the parameters of the video track to...
Mpeg2 720x480i NTSC (173336 frames @ 29.970 fps (Constant) = 02:00:01.060533333)
...but the video frame size is actually 853x480 pixels (as reported by my video editing suite), which equals an Aspect Ratio of 1.78:1 (or 16:9).
It certainly isn't 720x480, which comes out to an AR of 1.50:1 (or 3:2 if you prefer). I believe an AR of 3:2 was the old "NTSC DTV" standard but that shouldn't apply to this title?
And before you ask, no, it isn't a square-looking picture with black bars at the sides. It plays as a typical non-anamorphic, full-frame (ie. no black bars), widescreen movie. And the problem is not just with this title, I've been noticing it with heaps of other titles as well.
And there's also something hinky with the above as 173336 frames divided by 29.970 fps should equal a runtime of 01:36:23, not 02:00:01 (the movie definitely runs 02:00:01).
So either the frame-count is wrong, or the frame-rate is wrong. If the frame-count is correct (which I tend to believe) then 173336 frames to a runtime of 02:00:01 comes out to roughly 24 fps, not 29.970.
Is this FPS inconsistency something to do with the interlacing? (Although, if that were the case, I'd expect the numbers to double, not just increase by 20%.)
Are these parameters set incorrectly on the disc and MakeMKV is just repeating the mistake, or is something going wrong within MakeMKV itself?
Why does MakeMKV report the incorrect parameters for some video tracks?
For example, I just ripped the Director's Cut of "Lock, Stock And Two Smoking Barrels" (1998) from DVD and MakeMKV set the parameters of the video track to...
Mpeg2 720x480i NTSC (173336 frames @ 29.970 fps (Constant) = 02:00:01.060533333)
...but the video frame size is actually 853x480 pixels (as reported by my video editing suite), which equals an Aspect Ratio of 1.78:1 (or 16:9).
It certainly isn't 720x480, which comes out to an AR of 1.50:1 (or 3:2 if you prefer). I believe an AR of 3:2 was the old "NTSC DTV" standard but that shouldn't apply to this title?
And before you ask, no, it isn't a square-looking picture with black bars at the sides. It plays as a typical non-anamorphic, full-frame (ie. no black bars), widescreen movie. And the problem is not just with this title, I've been noticing it with heaps of other titles as well.
And there's also something hinky with the above as 173336 frames divided by 29.970 fps should equal a runtime of 01:36:23, not 02:00:01 (the movie definitely runs 02:00:01).
So either the frame-count is wrong, or the frame-rate is wrong. If the frame-count is correct (which I tend to believe) then 173336 frames to a runtime of 02:00:01 comes out to roughly 24 fps, not 29.970.
Is this FPS inconsistency something to do with the interlacing? (Although, if that were the case, I'd expect the numbers to double, not just increase by 20%.)
Are these parameters set incorrectly on the disc and MakeMKV is just repeating the mistake, or is something going wrong within MakeMKV itself?