DVD To MKV: Variable Frame Rate Setting Some Times Results In A File With A Constant Frame Rate

[Hand On Tha Brizzake]

On my system, HandBrake [latest nightly build at the time of each conversion] is used strictly to convert from DVDs to MKVs. One of the settings chosen as default is the variable frame rate radio button and the frame rate is always same as the source. It does not occur frequently but from time to time the output file has a constant frame rate. For example, below is the output of a scan of the 1997 DVD release [title 1 – full frame version] of the 1980 film Raging Bull. The frame rate was set to variable and the pop-up button was set to the default which is same as source.

Code: Select all

General
Unique ID : 111375941729405588682317824769717078287 (0x53CA39E3666808057C073C0C98B6890F)
Complete name : /Users/User/Movies/1980 – Raging Bull (Feature Title Transcode – Full Frame) [1997 NTSC Single Sided Dual Layer DVD Reissue].mkv
Format : Matroska
Format version : Version 2
File size : 567 MiB
Duration : 2h 8mn
Overall bit rate : 616 Kbps
Encoded date : UTC 2015-07-18T01:05:36Z
Writing application : HandBrake 7349svn 2015071001
Writing library : Lavf56.1.0

Video
ID : 1
Format : HEVC
Format/Info : High Efficiency Video Coding
Format profile : Main@L3@Main
Codec ID : V_MPEGH/ISO/HEVC
Duration : 2h 8mn
Bit rate : 27.8 Kbps
Width : 718 pixels
Height : 480 pixels
Display aspect ratio : 4:3
Original display aspect ratio : 4:3
Frame rate mode : Constant
Frame rate : 26.064 fps
Original frame rate : 23.976 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Bits/(Pixel*Frame) : 0.003
Stream size : 25.6 MiB (5%)
Writing library : x265 1.7:[Mac OS X][clang 6.1.0][64 bit]
Encoding settings : wpp / ctu=64 / min-cu-size=8 / max-tu-size=32 / tu-intra-depth=4 / tu-inter-depth=4 / me=3 / subme=5 / merange=92 / rect / amp / max-merge=5 / temporal-mvp / no-early-skip / rdpenalty=0 / tskip / no-tskip-fast / strong-intra-smoothing / no-lossless / no-cu-lossless / no-constrained-intra / no-fast-intra / open-gop / no-temporal-layers / interlace=0 / keyint=240 / min-keyint=24 / scenecut=40 / rc-lookahead=60 / lookahead-slices=0 / bframes=8 / bframe-bias=0 / b-adapt=2 / ref=5 / weightp / weightb / aq-mode=1 / aq-strength=1.00 / cbqpoffs=0 / crqpoffs=0 / rd=6 / psy-rd=0.30 / rdoq-level=2 / psy-rdoq=1.00 / signhide / deblock / sao / no-sao-non-deblock / b-pyramid / cutree / rc=cbr / bitrate=0 / qcomp=0.60 / qpmin=0 / qpmax=51 / qpstep=4 / ipratio=1.40 / pbratio=1.30
Default : Yes
Forced : No
Color range : Limited
Color primaries : BT.601 NTSC
Transfer characteristics : BT.709
Matrix coefficients : BT.601

Audio #1
ID : 2
Format : AC-3
Format/Info : Audio Coding 3
Format profile : Dolby Digital
Mode extension : CM (complete main)
Format settings, Endianness : Big
Codec ID : A_AC3
Duration : 2h 8mn
Bit rate mode : Constant
Bit rate : 192 Kbps
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 48.0 KHz
Compression mode : Lossy
Stream size : 177 MiB (31%)
Title : Stereo
Language : English
Default : Yes
Forced : No

Audio #2
ID : 3
Format : AC-3
Format/Info : Audio Coding 3
Format profile : Dolby Digital
Mode extension : CM (complete main)
Format settings, Endianness : Big
Codec ID : A_AC3
Duration : 2h 8mn
Bit rate mode : Constant
Bit rate : 192 Kbps
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 48.0 KHz
Compression mode : Lossy
Stream size : 177 MiB (31%)
Title : Stereo
Language : French
Default : No
Forced : No

Audio #3
ID : 4
Format : AC-3
Format/Info : Audio Coding 3
Mode extension : CM (complete main)
Format settings, Endianness : Big
Codec ID : A_AC3
Duration : 2h 8mn
Bit rate mode : Constant
Bit rate : 192 Kbps
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 48.0 KHz
Compression mode : Lossy
Stream size : 177 MiB (31%)
Title : Stereo
Language : Spanish
Default : No
Forced : No

Text #1
ID : 5
Format : VobSub
Codec ID : S_VOBSUB
Codec ID/Info : Picture based subtitle format used on DVDs
Language : English
Default : No
Forced : No

Text #2
ID : 6
Format : VobSub
Codec ID : S_VOBSUB
Codec ID/Info : Picture based subtitle format used on DVDs
Language : French
Default : No
Forced : No

Text #3
ID : 7
Format : VobSub
Codec ID : S_VOBSUB
Codec ID/Info : Picture based subtitle format used on DVDs
Language : Spanish
Default : No
Forced : No

Text #4
ID : 8
Format : VobSub
Codec ID : S_VOBSUB
Codec ID/Info : Picture based subtitle format used on DVDs
Language : English
Default : No
Forced : No

Text #5
ID : 9
Format : VobSub
Codec ID : S_VOBSUB
Codec ID/Info : Picture based subtitle format used on DVDs
Language : French
Default : No
Forced : No

Text #6
ID : 10
Format : VobSub
Codec ID : S_VOBSUB
Codec ID/Info : Picture based subtitle format used on DVDs
Language : Spanish
Default : No
Forced : No

Text #7
ID : 11
Format : ASS
Codec ID : S_TEXT/ASS
Codec ID/Info : Advanced Sub Station Alpha
Compression mode : Lossless
Language : English
Default : No
Forced : No

Menu
00:00:00.000 : :Chapter 1
00:02:40.302 : :Chapter 2
00:03:52.875 : :Chapter 3
00:07:30.926 : :Chapter 4
00:14:51.549 : :Chapter 5
00:17:01.750 : :Chapter 6
00:31:11.152 : :Chapter 7
00:33:06.935 : :Chapter 8
00:37:51.169 : :Chapter 9
00:41:04.064 : :Chapter 10
00:43:38.552 : :Chapter 11
00:56:48.727 : :Chapter 12
00:58:50.849 : :Chapter 13
01:02:48.686 : :Chapter 14
01:06:14.308 : :Chapter 15
01:09:01.747 : :Chapter 16
01:13:21.139 : :Chapter 17
01:18:08.760 : :Chapter 18
01:21:52.938 : :Chapter 19
01:33:40.698 : :Chapter 20
01:36:54.392 : :Chapter 21
01:40:11.555 : :Chapter 22
01:41:21.091 : :Chapter 23
01:49:05.741 : :Chapter 24
01:50:18.814 : :Chapter 25
01:53:45.721 : :Chapter 26
01:56:53.942 : :Chapter 27
01:58:44.874 : :Chapter 28
02:00:49.666 : :Chapter 29
02:03:43.473 : :Chapter 30

It may be obvious that the auto-cropping setting and anamorphic settings are set to auto, loose with a modulus of 2 respectively but I am not sure if it is obvious that both detelecine and decomb filters are enabled and set to default. My questions are these: [a] why is the frame rate constant and why the strange frame rate of 26.064? I am not complaining but it baffles me. My guess is the detelecine filter did more work on this film than most others but I can be quite wrong. Education is always welcome here though I read and re-read the entire documentation. Thanks in advance for the understanding.

[Deleted User 13735]

Sorry, MediaInfo has never been good about providing accurate framerate information from x264.
Encode logs are required for every support question here.

[Hand On Tha Brizzake]

I accidentally deleted the log. When the matted version is finished I will investigate if the same result occurs. If so I will paste its log.

Why is the frame rate [or any data] from MediaInfo unreliable? Is there a more reliable like program for Mac OS? I used MediaInfo for Windows once upon a time thus I am using the same for Mac OS.

P.S. Tis was H.265 (x265) but I guess the same applies.

[Deleted User 13735]

WITHOUT THE REQUIRED LOGS, ANSWERS TO YOUR QUESTIONS DO NOT EXIST

[JohnAStebbins]

Mediainfo does not report what the framerate flags are set to. It only measures the distance from one frame to another for some sample of frames. So it is notoriously inaccurate and wrong much of the time.

[Hand On Tha Brizzake]

Is there any like program for Mac OS that does report the set flags for frame rate and possibly any other data about which MediaInfo is inaccurate?? Other app store apps use the same MediaInfo library so they must be just as inaccurate.

I will ensure the log for the next supposedly constant frame rate output file is saved.