i need help

  Metadata:
    encoder         : libebml v1.3.5 + libmatroska v1.4.8
    creation_time   : 2018-02-15T05:13:09.000000Z
    Writing frontend: StaxRip v1.7.0.6
  Duration: 00:42:19.91, start: 0.000000, bitrate: 2768 kb/s
    Stream #0:0: Video: hevc (Main 10), yuv420p10le(tv), 1920x1080, SAR 1:1 DAR
16:9, 23.98 fps, 23.98 tbr, 1k tbn, 23.98 tbc (default)
    Metadata:
      BPS             : 2317827
      BPS-eng         : 2317827
      DURATION        : 00:42:19.913000000
      DURATION-eng    : 00:42:19.913000000
      NUMBER_OF_FRAMES: 60897
      NUMBER_OF_FRAMES-eng: 60897
      NUMBER_OF_BYTES : 735885003
      NUMBER_OF_BYTES-eng: 735885003
      _STATISTICS_WRITING_APP: mkvmerge v20.0.0 ('I Am The Sun') 64-bit
      _STATISTICS_WRITING_APP-eng: mkvmerge v20.0.0 ('I Am The Sun') 64-bit
      _STATISTICS_WRITING_DATE_UTC: 2018-02-15 05:13:09
      _STATISTICS_WRITING_DATE_UTC-eng: 2018-02-15 05:13:09
      _STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
      _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
    Stream #0:1(eng): Audio: aac (LC), 48000 Hz, 5.1, fltp (default) (forced)
    Metadata:
      BPS             : 448092
      BPS-eng         : 448092
      DURATION        : 00:42:19.904000000
      DURATION-eng    : 00:42:19.904000000
      NUMBER_OF_FRAMES: 119058
      NUMBER_OF_FRAMES-eng: 119058
      NUMBER_OF_BYTES : 142264123
      NUMBER_OF_BYTES-eng: 142264123
      _STATISTICS_WRITING_APP: mkvmerge v20.0.0 ('I Am The Sun') 64-bit
      _STATISTICS_WRITING_APP-eng: mkvmerge v20.0.0 ('I Am The Sun') 64-bit
      _STATISTICS_WRITING_DATE_UTC: 2018-02-15 05:13:09
      _STATISTICS_WRITING_DATE_UTC-eng: 2018-02-15 05:13:09
      _STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
      _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
    Stream #0:2(eng): Subtitle: subrip
    Metadata:
      BPS             : 78
      BPS-eng         : 78
      DURATION        : 00:42:12.029000000
      DURATION-eng    : 00:42:12.029000000
      NUMBER_OF_FRAMES: 855
      NUMBER_OF_FRAMES-eng: 855
      NUMBER_OF_BYTES : 24807
      NUMBER_OF_BYTES-eng: 24807
      _STATISTICS_WRITING_APP: mkvmerge v20.0.0 ('I Am The Sun') 64-bit
      _STATISTICS_WRITING_APP-eng: mkvmerge v20.0.0 ('I Am The Sun') 64-bit
      _STATISTICS_WRITING_DATE_UTC: 2018-02-15 05:13:09
      _STATISTICS_WRITING_DATE_UTC-eng: 2018-02-15 05:13:09
      _STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
      _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
    Stream #0:3(eng): Subtitle: subrip
    Metadata:
      BPS             : 91
      BPS-eng         : 91
      DURATION        : 00:42:12.029000000
      DURATION-eng    : 00:42:12.029000000
      NUMBER_OF_FRAMES: 1088
      NUMBER_OF_FRAMES-eng: 1088
      NUMBER_OF_BYTES : 29083
      NUMBER_OF_BYTES-eng: 29083
      _STATISTICS_WRITING_APP: mkvmerge v20.0.0 ('I Am The Sun') 64-bit
      _STATISTICS_WRITING_APP-eng: mkvmerge v20.0.0 ('I Am The Sun') 64-bit
      _STATISTICS_WRITING_DATE_UTC: 2018-02-15 05:13:09
      _STATISTICS_WRITING_DATE_UTC-eng: 2018-02-15 05:13:09
      _STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
      _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
Stream mapping:
  Stream #0:0 -> #0:0 (hevc (native) -> png (native))
Press [q] to stop, [?] for help
[subtitles @ 00bffb00] Unable to parse option value "pathtosub.ass" as image size
    Last message repeated 1 times
[subtitles @ 00bffb00] Error setting option original_size to value pathtosub.ass.
[Parsed_subtitles_0 @ 00b4dd80] Error applying options to the filter.
[AVFilterGraph @ 00b2c380] Error initializing filter 'subtitles' with args 'pathtosub.ass'
Error reinitializing filters!
Failed to inject frame into filter network: Invalid argument
Error while processing the decoded data for stream #0:0
Conversion failed!

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Changed some lines to preserve my anonymity.