"Experimental PGS subtitle rendering" not working

[mistamoronic]

I just tried that and I don't think it did anything, but I think I have figured it out, sort of? The subtitles are seemingly just taking a long time to get extracted, like 30 minutes or so.
You can see here that I exited out of the movie at 5:38


But the full log didn't show up until 6:06. I will attach the logs at the end but looking at the end of the 5:38 log you can see that I exited the movie

Code:

[2025-01-16 23:38:31.421 +00:00] [INF] [27] MediaBrowser.Controller.MediaEncoding.TranscodingJob: Stopping ffmpeg process with q command for "/cache/transcodes/f2e2875eef767ec08a29e990c3471e32.m3u8"
[2025-01-16 23:38:32.903 +00:00] [INF] [27] MediaBrowser.MediaEncoding.Transcoding.TranscodeManager: FFmpeg exited with code 0
[2025-01-16 23:38:32.903 +00:00] [INF] [27] MediaBrowser.MediaEncoding.Transcoding.TranscodeManager: Deleting partial stream file(s) "/cache/transcodes/f2e2875eef767ec08a29e990c3471e32.m3u8"
[2025-01-16 23:38:34.496 +00:00] [INF] [123] Emby.Server.Implementations.Session.SessionManager: Playback stopped reported by app "Jellyfin Web" "10.10.3" playing "Black Panther: Wakanda Forever". Stopped at "58167" ms

Then, not until 6:06 pm that this happens

Code:

[2025-01-17 00:06:38.713 +00:00] [WRN] [38] MediaBrowser.MediaEncoding.Subtitles.SubtitleEncoder: Deleting extracted subtitle due to failure: "/config/data/subtitles/6/679a09a5-f2ae-7f03-3a31-149a316f394d.sup"
[2025-01-17 00:06:38.714 +00:00] [WRN] [38] MediaBrowser.MediaEncoding.Subtitles.SubtitleEncoder: Deleting extracted subtitle due to failure: "/config/data/subtitles/7/72ae2c44-7753-ac87-915d-bc3bdd8eaeb7.sup"
[2025-01-17 00:06:38.715 +00:00] [WRN] [38] MediaBrowser.MediaEncoding.Subtitles.SubtitleEncoder: Deleting extracted subtitle due to failure: "/config/data/subtitles/8/86eaa0f1-8856-3512-c238-907360179d6d.sup"
[2025-01-17 00:06:38.717 +00:00] [WRN] [38] MediaBrowser.MediaEncoding.Subtitles.SubtitleEncoder: Unable to get streams for File:"/media/Movies/Black Panther Wakanda Forever (2022)/Black Panther - Wakanda Forever (2022) 2160p UHD BluRay REMUX HDR 10bit HEVC [Multi Audios] HDC.mkv"
MediaBrowser.Common.FfmpegException: ffmpeg subtitle extraction failed for file:"/media/Movies/Black Panther Wakanda Forever (2022)/Black Panther - Wakanda Forever (2022) 2160p UHD BluRay REMUX HDR 10bit HEVC [Multi Audios] HDC.mkv"
  at MediaBrowser.MediaEncoding.Subtitles.SubtitleEncoder.ExtractAllExtractableSubtitlesInternal(MediaSourceInfo mediaSource, List`1 subtitleStreams, CancellationToken cancellationToken)
  at MediaBrowser.MediaEncoding.Subtitles.SubtitleEncoder.ExtractAllExtractableSubtitles(MediaSourceInfo mediaSource, CancellationToken cancellationToken)
[2025-01-17 00:06:38.774 +00:00] [ERR] [38] Jellyfin.Api.Middleware.ExceptionMiddleware: Error processing request: "Could not find file '/config/data/subtitles/6/679a09a5-f2ae-7f03-3a31-149a316f394d.sup'". URL "GET" "/Videos/7b8ea7ff-8385-5f74-55e1-d5ad8a10609a/7b8ea7ff83855f7455e1d5ad8a10609a/Subtitles/14/0/Stream.pgssub".

I am not sure why it doesn't show up in the logs, but I think the subtitle extraction is what is happening in that 30 minutes or so, because in my docker logs I can see this


And then that just continues for like the next 30 minutes until we reach the end, with the 6:06 log


Anyway, I think the subtitle extraction fails if I use my browser, but if I start the movie on my TV then I think it successfully extracts it after the 30 minutes, I started a move then went back to it a couple hours later and the subtitles were there, so maybe my computer is just slow?? I do have the movies stored on a HDD, not sure if it putting it on an SSD would make it faster.


https://pastebin.com/FdXZFZjL - 5:38 log
https://pastebin.com/KNFmDMWR - 6:06 log
https://pastebin.com/8V8wb4Mg - ffmpeg transcode log