subtitles not working

[Aaronelder 0]

i am having issues with Emby windows with subtitles, it plays fine on Emby android they display but when i use my surface to play emby no subtitles work?

[Luke 42195]

@Aaronelder

 

Hi there, let's look at an example. Please attach the information requested in how to report a media playback issue. Thanks!

 

[Aaronelder 0]

embyserver.txt

 

attached the log files from my PC

[visproduction 332]

GET M3u8 and five .vtt - no error
lines 521 to 523
 

Quote

2026-01-22 17:20:31.890 Info DynamicHlsService-0HNIPIT9EB6CK:00000001: Starting transcoding because currentTranscodingIndex=null

2026-01-22 17:20:32.015 Info DynamicHlsService-0HNIPIT9EB6CK:00000001: ProcessRun 'StreamTranscode fc16f1' Execute: 
C:\Users\Aaron\AppData\Roaming\Emby-Server\system\ffmpeg.exe -loglevel +timing -y -print_graphs_file 
"C:\Users\Aaron\AppData\Roaming\Emby-Server\programdata\logs\ffmpeg-transcode-fc16f120-3fd4-40c4-bfc0-1bf4ea3d00a6_1graph.txt" -copyts -start_at_zero -init_hw_device "cuda=cuda:0" -f matroska,webm -c:v:0 hevc -threads:v:0 1 -hwaccel:v:0 cuda -hwaccel_output_format:v:0 cuda -noautorotate -i "V:\Tv shows\Foundation\Foundation (2021) Season 2 S02 (1080p ATVP WEB-DL x265 HEVC 10bit EAC3 5.1 Silence)\Foundation (2021) - S02E07 - A Necessary Death (1080p ATVP WEB-DL x265 Silence).mkv" -filter_complex "[0:0]scale_cuda@f1=w=720:h=300:format=yuv420p,setsar@f2=sar=sar[f2_out0]" -map [f2_out0] -map 0:1 -sn -c:v:0 h264_nvenc -b:v:0 1616000 -g:v:0 72 -maxrate:v:0 1616000 -bufsize:v:0 3232000 -keyint_min:v:0 72 -r:v:0 23.976024627685547 -profile:v:0 main -c:a:0 ac3 -ab:a:0 384000 -ar:a:0 48000 -ac:a:0 6 -metadata:s:a:0 language=eng -disposition:a:0 default -max_delay 5000000 -avoid_negative_ts disabled -f segment -map_metadata -1 -map_chapters -1 -segment_format mpegts -segment_list 
"C:\Users\Aaron\AppData\Roaming\Emby-Server\programdata\transcoding-temp\3BB4BA\3BB4BA.m3u8" -segment_list_type m3u8 -segment_time 00:00:03.000 -segment_start_number 0 -individual_header_trailer 0 -write_header_trailer 0 -segment_write_temp 1 
"C:\Users\Aaron\AppData\Roaming\Emby-Server\programdata\transcoding-temp\3BB4BA\3BB4BA_%d.ts" -map 0:2 -map 0:0 -an -c:v:0 copy -c:s:0 webvtt -max_delay 5000000 -avoid_negative_ts disabled -f segment -map_metadata -1 -segment_format webvtt -segment_list 
"C:\Users\Aaron\AppData\Roaming\Emby-Server\programdata\transcoding-temp\3BB4BA\3BB4BA_s2.m3u8" -segment_list_type m3u8 -segment_time 00:00:03.000 -segment_start_number 0 -break_non_keyframes 1 -individual_header_trailer 1 -write_header_trailer 0 -write_empty_segments 1 -segment_write_temp 1 -min_frame_time 00:00:00.000 
"C:\Users\Aaron\AppData\Roaming\Emby-Server\programdata\transcoding-temp\3BB4BA\3BB4BA_s2_%d.vtt" -map 0:3 -map 0:0 -an -c:v:0 copy -c:s:0 webvtt -max_delay 5000000 -avoid_negative_ts disabled -f segment -map_metadata -1 -segment_format webvtt -segment_list 
"C:\Users\Aaron\AppData\Roaming\Emby-Server\programdata\transcoding-temp\3BB4BA\3BB4BA_s3.m3u8" -segment_list_type m3u8 -segment_time 00:00:03.000 -segment_start_number 0 -break_non_keyframes 1 -individual_header_trailer 1 -write_header_trailer 0 -write_empty_segments 1 -segment_write_temp 1 -min_frame_time 00:00:00.000 
"C:\Users\Aaron\AppData\Roaming\Emby-Server\programdata\transcoding-temp\3BB4BA\3BB4BA_s3_%d.vtt" -map 0:4 -map 0:0 -an -c:v:0 copy -c:s:0 webvtt -max_delay 5000000 -avoid_negative_ts disabled -f segment -map_metadata -1 -segment_format webvtt -segment_list 
"C:\Users\Aaron\AppData\Roaming\Emby-Server\programdata\transcoding-temp\3BB4BA\3BB4BA_s4.m3u8" -segment_list_type m3u8 -segment_time 00:00:03.000 -segment_start_number 0 -break_non_keyframes 1 -individual_header_trailer 1 -write_header_trailer 0 -write_empty_segments 1 -segment_write_temp 1 -min_frame_time 00:00:00.000 
"C:\Users\Aaron\AppData\Roaming\Emby-Server\programdata\transcoding-temp\3BB4BA\3BB4BA_s4_%d.vtt" -map 0:5 -map 0:0 -an -c:v:0 copy -c:s:0 webvtt -max_delay 5000000 -avoid_negative_ts disabled -f segment -map_metadata -1 -segment_format webvtt -segment_list 
"C:\Users\Aaron\AppData\Roaming\Emby-Server\programdata\transcoding-temp\3BB4BA\3BB4BA_s5.m3u8" -segment_list_type m3u8 -segment_time 00:00:03.000 -segment_start_number 0 -break_non_keyframes 1 -individual_header_trailer 1 -write_header_trailer 0 -write_empty_segments 1 -segment_write_temp 1 -min_frame_time 00:00:00.000 
"C:\Users\Aaron\AppData\Roaming\Emby-Server\programdata\transcoding-temp\3BB4BA\3BB4BA_s5_%d.vtt"

2026-01-22 17:20:32.637 Info DynamicHlsService-0HNIPIT9EB6CL:00000001: http/1.1 GET http://host1:8096/emby/videos/32315/hls1/main/1.ts?PlaySessionId=d62e0a80dd224a02a322549807a36958. Source Ip: host2, Accept=*/*, Connection=keep-alive, Host=host1:8096, User-Agent=EmbyMedia.EmbyTheater/2.234.2.0, Range=bytes=0-, Icy-MetaData=1

 

[Luke 42195]

OK we are looking into it .Thanks.

[Aaronelder 0]

Hi Luke,

 

any luck finding the issue?

[Luke 42195]

Hi, please attach both the emby server and ffmpeg logs together. Thanks !

[jellelle 3]

embyserver.txtffmpeg-transcode-f4a701b5-2210-4ef0-9543-54e46d49fab6_1.txtffmpeg-remux-9d661f56-68ef-4d85-863b-ca8542d1df1e_1.txt

Snippet of the embyserver log and ffmpeg logs, when playing s01e02 on Android phone (subtitles are fine) and s01e03 on Emby for Windows (subtitles don't show up).