Samsung Q95 - forced CC subtitles

[FordGuy61]

Looks like EIA-608 (aka Line 21) subtitles. They are part of the video stream, not a separate track.

Examine the file with MediaInfo. If EIA-608, you’ll see something similar to:

Text #1
ID                                       : 4113 (0x1011)-CC1
Menu ID                                  : 1 (0x1)
Format                                   : EIA-608
Muxing mode                              : SCTE 128 / DTVCC Transport
Muxing mode, more info                   : Muxed in Video #1
Duration                                 : 29 min 58 s
Bit rate mode                            : Constant
Stream size                              : 0.00 Byte (0%)
CaptionServiceName                       : CC1

To remove:

Samsung forcing closed captions

You could check if this is EIA-608 subtitles. MKVToolNix apparently doesn’t see those correct and in consequence won’t offer you an option to drop them. You can however drop them using ffmpeg (native version or the one bundled within your PMS): ./Plex\ Transcoder -i "<INPUT_FILE>" -codec copy -bsf:v "filter_units=remove_types=6" "<OUTPUT_FILE>" Where <INPUT_FILE> and <OUTPUT_FILE> are the full paths of the respective source/output files.