When I attempt to play a specific file on my smart TV (Device: "LG WebOS TV" using profile "LG TV(2015 models)", I get the error message "not supported".

The FFMPEG for the file is as follows:

ffmpeg version N-78742-gf477849 Copyright (c) 2000-2017 the FFmpeg developers
built with gcc 4.9.2 (GCC)
configuration: --arch=x86_64 --target-os=mingw32 --cross-prefix=x86_64-w64-mingw32- --enable-static --disable-shared --enable-zlib --disable-postproc --prefix=/home/anon/ffmpeg/build/gpl64 --enable-libmp3lame --enable-libx264 --enable-gpl --extra-libs='-lx264 -lpthread -lstdc++' --enable-runtime-cpudetect --extra-cflags=-I/home/anon/cc32/include --extra-ldflags=-L/home/anon/cc64/lib --pkg-config=pkg-config --pkg-config-flags=--static --disable-w32threads --enable-libvpx --enable-libvorbis --enable-libtheora --enable-libx265 --enable-cuda --enable-cuvid --enable-dxva2 --enable-libmfx --enable-nvenc --enable-gnutls --extra-libs='-lz -lnettle -lhogweed -lgmp -lidn -lws2_32 -lcrypt32'
libavutil 55. 74.100 / 55. 74.100
libavcodec 57.103.100 / 57.103.100
libavformat 57. 76.100 / 57. 76.100
libavdevice 57. 7.100 / 57. 7.100
libavfilter 6.100.100 / 6.100.100
libswscale 4. 7.102 / 4. 7.102
libswresample 2. 8.100 / 2. 8.100
Input #0, matroska,webm, from 'E:\recorded.mkv':
Metadata:
ENCODER : Lavf57.56.101
Duration: 01:05:51.54, start: 0.000000, bitrate: 944 kb/s
Stream #0:0(eng): Video: hevc (Main), yuv420p(tv, progressive), 1280x534 [SAR 1:1 DAR 640:267], 23.98 fps, 23.98 tbr, 1k tbn, 23.98 tbc (default)
Metadata:
BPS-eng : 3458315
DURATION-eng : 01:04:48.593000000
NUMBER_OF_FRAMES-eng: 93233
NUMBER_OF_BYTES-eng: 1680997733
_STATISTICS_WRITING_APP-eng: mkvmerge v29.0.0 ('Like It Or Not') 64-bit
_STATISTICS_WRITING_DATE_UTC-eng: 2019-04-19 00:55:23
_STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
ENCODER : Lavc57.64.101 libx265
DURATION : 01:04:48.601000000
Stream #0:1(eng): Audio: aac (LC), 48000 Hz, stereo, fltp (default)
Metadata:
BPS-eng : 125375
DURATION-eng : 01:04:48.554000000
NUMBER_OF_FRAMES-eng: 182276
NUMBER_OF_BYTES-eng: 60940943
_STATISTICS_WRITING_APP-eng: mkvmerge v29.0.0 ('Like It Or Not') 64-bit
_STATISTICS_WRITING_DATE_UTC-eng: 2019-04-19 00:55:23
_STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
ENCODER : Lavc57.64.101 aac
DURATION : 01:04:48.575000000
Stream #0:2(eng): Subtitle: subrip
Metadata:
BPS-eng : 174
DURATION-eng : 01:03:09.077000000
NUMBER_OF_FRAMES-eng: 977
NUMBER_OF_BYTES-eng: 82810
_STATISTICS_WRITING_APP-eng: mkvmerge v29.0.0 ('Like It Or Not') 64-bit
_STATISTICS_WRITING_DATE_UTC-eng: 2019-04-19 00:55:23
_STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
DURATION : 01:05:51.539000000
At least one output file must be specified

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


---> DB Level Info: 93, 1
---> Frame rate: 23.98
---> Aspect ratio: 640:267 PAR=1:1
---> Duration: 01:05:51