Mezzmo doesn't detect all subtitles

Hi,

I've just noticed that for some movies that have multiple embedded subtitles, not all of the available subtitles are listed under Properties > Subtitles. For example, the movie has 5 subtitles listed in VLC (English, SDH, Non-English parts translated only, French, Spanish), but on the Mezzmo Subtitles screen only the first 2 are displayed. I'm trying to extract and burn the 3rd track, but it's not even listed. I've tried changing the subtitle probing option, but it doesn't help. I've included the FFmpeg info for the movie. This is the second recent release movie it's happened with this week - however in the other case it didn't even list any of the available subtitles. Do you have an idea why this might be happening?

ffmpeg version N-78742-gf477849 Copyright (c) 2000-2016 the FFmpeg developers
built with gcc 4.9.2 (GCC)
configuration: --enable-memalign-hack --arch=x86_64 --target-os=mingw32 --cross-prefix=x86_64-w64-mingw32- --enable-static --disable-shared --enable-zlib --disable-postproc --prefix=/home/peter/ffmpeg/build/gpl64 --enable-libmp3lame --enable-libx264 --enable-gpl --extra-libs='-lx264 -lpthread -lstdc++' --enable-runtime-cpudetect --extra-cflags=-I/home/peter/cc32/include --extra-ldflags=-L/home/peter/cc64/lib --pkg-config=pkg-config --pkg-config-flags=--static --disable-w32threads --enable-libvpx --enable-libvorbis --enable-libtheora --enable-libx265 --enable-libmfx --enable-gnutls --extra-libs='-lz -lnettle -lhogweed -lgmp -lidn -lws2_32 -lcrypt32'
libavutil 55. 19.100 / 55. 19.100
libavcodec 57. 25.101 / 57. 25.101
libavformat 57. 26.100 / 57. 26.100
libavdevice 57. 0.101 / 57. 0.101
libavfilter 6. 36.100 / 6. 36.100
libswscale 4. 0.100 / 4. 0.100
libswresample 2. 0.101 / 2. 0.101
Input #0, matroska,webm, from 'C:\Users\Home\Pictures\Videos\Movies\Movies\Docto r.Strange.2016.1080p.BluRay.x264-SPARKS[rarbg]\Doctor.Strange.2016.1080p.BluRay.x264-SPARKS.mkv':
Metadata:
encoder : libebml v1.3.4 + libmatroska v1.4.5
creation_time : 2017-02-15 00:10:46
Duration: 01:54:58.56, start: 0.000000, bitrate: 9522 kb/s
Chapter #0:0: start 0.000000, end 274.566000
Metadata:
title : 00:00:00.000
Chapter #0:1: start 274.566000, end 616.825000
Metadata:
title : 00:04:34.566
Chapter #0:2: start 616.825000, end 1112.153000
Metadata:
title : 00:10:16.825
Chapter #0:3: start 1112.153000, end 1477.017000
Metadata:
title : 00:18:32.153
Chapter #0:4: start 1477.017000, end 1900.482000
Metadata:
title : 00:24:37.017
Chapter #0:5: start 1900.482000, end 2313.811000
Metadata:
title : 00:31:40.482
Chapter #0:6: start 2313.811000, end 2596.135000
Metadata:
title : 00:38:33.811
Chapter #0:7: start 2596.135000, end 2904.527000
Metadata:
title : 00:43:16.135
Chapter #0:8: start 2904.527000, end 3334.498000
Metadata:
title : 00:48:24.527
Chapter #0:9: start 3334.498000, end 3904.359000
Metadata:
title : 00:55:34.498
Chapter #0:10: start 3904.359000, end 4358.437000
Metadata:
title : 01:05:04.359
Chapter #0:11: start 4358.437000, end 4934.346000
Metadata:
title : 01:12:38.437
Chapter #0:12: start 4934.346000, end 5308.637000
Metadata:
title : 01:22:14.346
Chapter #0:13: start 5308.637000, end 5700.904000
Metadata:
title : 01:28:28.637
Chapter #0:14: start 5700.904000, end 6306.509000
Metadata:
title : 01:35:00.904
Chapter #0:15: start 6306.509000, end 6898.560000
Metadata:
title : 01:45:06.509
Stream #0:0: Video: h264 (High), yuv420p, 1920x808 [SAR 1:1 DAR 240:101], 23.98 fps, 23.98 tbr, 1k tbn, 47.95 tbc (default)
Metadata:
BPS : 8010636
BPS-eng : 8010636
DURATION : 01:54:58.559000000
DURATION-eng : 01:54:58.559000000
NUMBER_OF_FRAMES: 165400
NUMBER_OF_FRAMES-eng: 165400
NUMBER_OF_BYTES : 6907730801
NUMBER_OF_BYTES-eng: 6907730801
_STATISTICS_WRITING_APP: mkvmerge v9.8.0 ('Kuglblids') 64bit
_STATISTICS_WRITING_APP-eng: mkvmerge v9.8.0 ('Kuglblids') 64bit
_STATISTICS_WRITING_DATE_UTC: 2017-02-15 00:10:46
_STATISTICS_WRITING_DATE_UTC-eng: 2017-02-15 00:10:46
_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: dts (DTS), 48000 Hz, 5.1(side), fltp, 1536 kb/s (default)
Metadata:
BPS : 1509000
BPS-eng : 1509000
DURATION : 01:54:58.560000000
DURATION-eng : 01:54:58.560000000
NUMBER_OF_FRAMES: 646740
NUMBER_OF_FRAMES-eng: 646740
NUMBER_OF_BYTES : 1301240880
NUMBER_OF_BYTES-eng: 1301240880
_STATISTICS_WRITING_APP: mkvmerge v9.8.0 ('Kuglblids') 64bit
_STATISTICS_WRITING_APP-eng: mkvmerge v9.8.0 ('Kuglblids') 64bit
_STATISTICS_WRITING_DATE_UTC: 2017-02-15 00:10:46
_STATISTICS_WRITING_DATE_UTC-eng: 2017-02-15 00:10:46
_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 : 43
BPS-eng : 43
DURATION : 01:52:14.186000000
DURATION-eng : 01:52:14.186000000
NUMBER_OF_FRAMES: 1319
NUMBER_OF_FRAMES-eng: 1319
NUMBER_OF_BYTES : 36953
NUMBER_OF_BYTES-eng: 36953
_STATISTICS_WRITING_APP: mkvmerge v9.8.0 ('Kuglblids') 64bit
_STATISTICS_WRITING_APP-eng: mkvmerge v9.8.0 ('Kuglblids') 64bit
_STATISTICS_WRITING_DATE_UTC: 2017-02-15 00:10:46
_STATISTICS_WRITING_DATE_UTC-eng: 2017-02-15 00:10:46
_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:
title : SDH
BPS : 49
BPS-eng : 49
DURATION : 01:54:01.626000000
DURATION-eng : 01:54:01.626000000
NUMBER_OF_FRAMES: 1584
NUMBER_OF_FRAMES-eng: 1584
NUMBER_OF_BYTES : 42310
NUMBER_OF_BYTES-eng: 42310
_STATISTICS_WRITING_APP: mkvmerge v9.8.0 ('Kuglblids') 64bit
_STATISTICS_WRITING_APP-eng: mkvmerge v9.8.0 ('Kuglblids') 64bit
_STATISTICS_WRITING_DATE_UTC: 2017-02-15 00:10:46
_STATISTICS_WRITING_DATE_UTC-eng: 2017-02-15 00:10:46
_STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
_STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
At least one output file must be specified

<MEZZMO>: Child process ended with code: 109, ExitCode=1


---> DB Level Info: 41, 100
---> Frame rate: 23.98
---> Aspect ratio: 240:101 PAR=1:1
---> Duration: 01:54:58

Hi,
it looks like this file has two embedded subtitles and that is what Mezzmo is detecting. In the folder where the file is located is there a folder containing extra subtitles? VLC often detects extra subtitles on disk so this might be why VLC shows more subtitles than Mezzmo. It could also be that in the folder with the file are external subtitles but with the language appended to the filename like Doctor.Strange.2016.1080p.BluRay.x264-SPARKS.en.srt and Mezzmo won't detect this.