Handbrake padding problem

[17:47:05] Compile-time hardening features are enabled
[17:47:05] Nvenc version 9.1
[17:47:09] hb_init: starting libhb thread

 # Starting Scan ...

[17:47:09] CPU: AMD Ryzen 5 3600 6-Core Processor
[17:47:09]  - logical processor count: 12
[17:47:09] Intel Quick Sync Video support: no
[17:47:09] hb_scan: path=D:\whyadoesithavetobesocomplicated.mkv, title_index=0
udfread ERROR: ECMA 167 Volume Recognition failed
src/libbluray/disc/disc.c:323: failed opening UDF image D:\whyadoesithavetobesocomplicated.mkv
src/libbluray/disc/disc.c:424: error opening file BDMV\index.bdmv
src/libbluray/disc/disc.c:424: error opening file BDMV\BACKUP\index.bdmv
src/libbluray/bluray.c:2585: nav_get_title_list(D:\whyadoesithavetobesocomplicated.mkv\) failed
[17:47:09] bd: not a bd - trying as a stream/file instead
libdvdnav: Using dvdnav version 6.0.1
libdvdread: Encrypted DVD support unavailable.
libdvdread:DVDOpenFileUDF:UDFFindFile /VIDEO_TS/VIDEO_TS.IFO failed
libdvdread:DVDOpenFileUDF:UDFFindFile /VIDEO_TS/VIDEO_TS.BUP failed
libdvdread: Can't open file VIDEO_TS.IFO.
libdvdnav: vm: failed to read VIDEO_TS.IFO
[17:47:09] dvd: not a dvd - trying as a stream/file instead
Input #0, matroska,webm, from 'D:\whyadoesithavetobesocomplicated.mkv':
  Metadata:
    encoder         : libebml v1.3.9 + libmatroska v1.5.2
    creation_time   : 2020-01-04T18:09:47.000000Z
  Duration: 01:49:09.59, start: 0.000000, bitrate: 11468 kb/s
    Stream #0:0(eng): Video: h264 (High), yuv420p(progressive), 1296x1080, SAR 1:1 DAR 6:5, 23.98 fps, 23.98 tbr, 1k tbn, 47.95 tbc (default)
    Metadata:
      BPS-eng         : 9956989
      DURATION-eng    : 01:49:09.585000000
      NUMBER_OF_FRAMES-eng: 157033
      NUMBER_OF_BYTES-eng: 8151768438
      _STATISTICS_WRITING_APP-eng: mkvmerge v40.0.0 ('Old Town Road + Pony') 64-bit
      _STATISTICS_WRITING_DATE_UTC-eng: 2020-01-04 18:09:47
      _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
    Stream #0:1(eng): Audio: dts (DTS), 48000 Hz, 5.1(side), fltp, 1536 kb/s (default)
    Metadata:
      BPS-eng         : 1508999
      DURATION-eng    : 01:49:09.590000000
      NUMBER_OF_FRAMES-eng: 614024
      NUMBER_OF_BYTES-eng: 1235416288
      _STATISTICS_WRITING_APP-eng: mkvmerge v40.0.0 ('Old Town Road + Pony') 64-bit
      _STATISTICS_WRITING_DATE_UTC-eng: 2020-01-04 18:09:47
      _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
[17:47:09] scan: decoding previews for title 1
[17:47:09] scan: audio 0x1: dca, rate=48000Hz, bitrate=1536000 English (DTS) (5.1 ch) (1536 kbps)
[17:47:10] scan: 10 previews, 1296x1080, 23.976 fps, autocrop = 0/0/0/0, aspect 1.20:1, PAR 1:1
[17:47:10] scan: supported video decoders: avcodec qsv
[17:47:10] libhb: scan thread found 1 valid title(s)

 # Processing Scan Information ...


 # Scan Finished ...