www.makemkv.com

Posted: **Mon Mar 21, 2016 9:12 am**

So I've noticed that MakeMKV has been making my DVD rips as "variable frame rate" instead of constant, and with an unmatching frame rate. Should I worry that it was copied incorrectly?

Video
ID : 1
Format : MPEG Video
Format version : Version 2
Format profile : Main@Main
Format settings, BVOP : No
Format settings, Matrix : Custom
Codec ID : V_MPEG2
Codec ID/Info : MPEG 1 or 2 Video
Duration : 23mn 18s
Bit rate mode : Variable
Bit rate : 6 131 Kbps
Maximum bit rate : 9 800 Kbps
Width : 720 pixels
Height : 480 pixels
Display aspect ratio : 4:3
Frame rate mode : Variable
Frame rate : 24.600 fps
Original frame rate : 29.970 (30000/1001) fps
Standard : Component
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Scan order : Top Field First
Compression mode : Lossy
Bits/(Pixel*Frame) : 0.721
Time code of first frame : 00:59:58;00
Time code source : Group of pictures header
Stream size : 1 023 MiB (97%)
Title : MPEG-2 480i NTSC 1.33:1
Language : English
Default : Yes
Forced : No
Color primaries : BT.601 NTSC
Transfer characteristics : BT.601
Matrix coefficients : BT.601

Posted: **Mon Mar 21, 2016 2:01 pm**

What did you use to generate the report?

There are several tools that declare the standard rates "variable" because they do not give exact inter-frame times. The "jitter" is considered "variable frame rate", even though it is impossible for them to always be truly constant.

Posted: **Thu Mar 24, 2016 6:12 pm**

MPC BE Nightly is reporting more and more files as variable, but it seems it's just the bundled version of mediainfo.

Posted: **Thu Mar 24, 2016 8:19 pm**

MediaInfo is one of the programs that I've read reports of "variable" when the rate is actually "fixed".

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