Supported External Subtitles; Supported Internal Subtitles - Samsung 6300 Series E-Manual

Supported external subtitles

"
Certain files, depending on how they were encoded, may not play on the TV.
MPEG-4 Timed text
SubStation Alpha
Advanced SubStation Alpha
SMPTE-TT Text

Supported internal subtitles

"
Certain files, depending on how they were encoded, may not play on the TV.
SubStation Alpha
Advanced SubStation Alpha
MPEG-4 Timed text
TTML in smooth streaming
SMPTE-TT Text
SMPTE-TT PNG
Name
SAMI
SubRip
SubViewer
Micro DVD
Powerdivx
Name
Xsub
SubRip
VobSub
Format
.ttxt
.smi
.srt
.sub
.sub or .txt
.ssa
.ass
.psb
.xml
Container
AVI
MKV
MKV
MKV
MKV
MP4
MP4
MP4
MP4