30 fps mkv file converting to a standard BluRay ends in stuttering. :/

[schmutzbrust]

Hello,

i have a video file with 30 fps and i would like to convert it to a standard BD. Tested DVDfab TSmuxer and multAVCHD so far, always with the same results. The BD has minor but noticable stuttering. :/ I'm sure it's because of the 30fps oddity, but the video is unique. So i have to work with this given file. :/

Is there any chance getting a smooth playing BD out of this?


Thanks in advance and sorry for the (maybe) bad english



Here is a Mediainfo log:


Format : Matroska

Format version : Version 4 / Version 2

File size : 9.05 GiB

Duration : 2 h 42 min

Overall bit rate : 7 955 kb/s

Encoded date : UTC 2022-10-10 12:48:31

Writing application : mkvmerge v6.5.0 ('Isn't she lovely') built on Oct 20 2013 12:50:05

Writing library : libebml v1.3.0 + libmatroska v1.4.1


Video

ID : 1

Format : AVC

Format/Info : Advanced Video Codec

Format profile : High@L4.2

Format settings, CABAC : Yes

Format settings, RefFrames : 4 frames

Codec ID : V_MPEG4/ISO/AVC

Duration : 2 h 42 min

Bit rate : 7 808 kb/s

Width : 1 920 pixels

Height : 1 080 pixels

Display aspect ratio : 16:9

Frame rate mode : Constant

Frame rate : 30.000 FPS

Color space : YUV

Chroma subsampling : 4:2:0

Bit depth : 8 bits

Scan type : Progressive

Bits/(Pixel*Frame) : 0.126

Stream size : 8.65 GiB (96%)

Writing library : x264 core 152 r2854 e9a5903

Encoding settings : cabac=1 / ref=2 / deblock=1:0:0 / analyse=0x3:0x113 / me=hex / subme=6 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=1 / me_range=16 / chroma_me=1 / trellis=1 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=-2 / threads=24 / lookahead_threads=4 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / bluray_compat=0 / constrained_intra=0 / bframes=2 / b_pyramid=2 / b_adapt=1 / b_bias=0 / direct=1 / weightb=1 / open_gop=0 / weightp=1 / keyint=60 / keyint_min=31 / scenecut=0 / intra_refresh=0 / rc_lookahead=30 / rc=2pass / mbtree=1 / bitrate=7808 / ratetol=1.0 / qcomp=0.60 / qpmin=0 / qpmax=69 / qpstep=4 / cplxblur=20.0 / qblur=0.5 / vbv_maxrate=7808 / vbv_bufsize=15616 / nal_hrd=none / filler=0 / ip_ratio=1.40 / aq=1:1.00

Default : Yes

Forced : No


Audio

ID : 2

Format : AC-3

Format/Info : Audio Coding 3

Mode : Dolby Digital

Format settings, Endianness : Big

Codec ID : A_AC3

Duration : 2 h 42 min

Bit rate mode : Constant

Bit rate : 192 kb/s

Channel(s) : 2 channels

Channel positions : Front: L R

Sampling rate : 48.0 kHz

Frame rate : 31.250 FPS (1536 SPF)

Bit depth : 16 bits

Compression mode : Lossy

Stream size : 224 MiB (2%)

Language : German

Service kind : Complete Main

Default : Yes

Forced : No

[rrats]

Are you sure your BD player ain't set to true film or 24fps mode or whatever

[schmutzbrust]

Yes, because the stuttering ist also visible on PC with a software player / vlc ect. :/

[davexnet]

Yes, because the stuttering ist also visible on PC with a software player / vlc ect. :/

Take the mediainfo report from your output file and put it up here

[rgr]

Original mkv is not stuttering?

[poisondeathray]

Many non compliant issues:

Some BD players might play out of spec BD's - but strictly speaking it's not compliant because of 30/1 FPS, keyint 60 (2 sec GOP is allowed if buffer is <15000, but you 15616 buffer), it's "labelled" as L4.2 (L4.1 is max for BD), no --blu-ray- compat switch, and 30000/1001 progressive encoding is "illegal", it needs to be encoded as mbaff or using --fake-interlaced switch. Any or all of these can cause stuttering on a BD player

So it would need to be re-encoded with compliant settings, and retimed to 30000/1001 FPS (both audio & video)