nodiaque 31 Posted January 1, 2022 Share Posted January 1, 2022 (edited) Hello everyone, I have some MKV video with dual audio and multiple subtitle in ASS format. Watching on my LG with emby app, the subtitles doesn't appear before at least 30 sec in. And if I toggle to another language, there's no subs for at least 30sec in. Emby app is on latest version on TV and server. In emby, it says everything is direct play. I tried with emby for android and subs appear immediately. Emby server 4.6.7.0. Emby for lg 1.0.31 Emby is inside a docker on unraid 6.9.2. Edited January 1, 2022 by nodiaque Link to comment Share on other sites More sharing options...
Luke 37022 Posted January 1, 2022 Share Posted January 1, 2022 Hi there, can we please look at an example? Please attach the information requested in how to report a media playback issue. thanks ! Link to comment Share on other sites More sharing options...
nodiaque 31 Posted January 1, 2022 Author Share Posted January 1, 2022 Here's the server logs for playback. It's Isekai Maou to Shoukan Shoujo no Dorei Majutsu embyserver-63776592000.txt Link to comment Share on other sites More sharing options...
nodiaque 31 Posted January 5, 2022 Author Share Posted January 5, 2022 Ok what I found out. From the log I see it's extracting the subs. If I start the playback and pause for about a minute, subs are there. So there's some kind of processing with the subs happening from the lg apps that doesn't happen either on browser or android Link to comment Share on other sites More sharing options...
Luke 37022 Posted January 5, 2022 Share Posted January 5, 2022 13 hours ago, nodiaque said: Ok what I found out. From the log I see it's extracting the subs. If I start the playback and pause for about a minute, subs are there. So there's some kind of processing with the subs happening from the lg apps that doesn't happen either on browser or android Android doesn't have to use extraction in most cases because the player supports more formats. Link to comment Share on other sites More sharing options...
Luke 37022 Posted January 5, 2022 Share Posted January 5, 2022 You can disable on the fly extraction altogether and have the server just burn in the subtitles with server transcoding, assuming your server can handle that. This can be done in server transcoding settings. Using external subtitles will be the most efficient option though. Link to comment Share on other sites More sharing options...
nodiaque 31 Posted January 5, 2022 Author Share Posted January 5, 2022 I'll try that. I'm pretty sure a Xeon gold w-2275 with 128gb ram and a p4000 can handle this little transcoding. But I think on the server side, when there's extraction on the fly, there should be a play delay like she there's audio or video transcoding until there's a small buffer. Link to comment Share on other sites More sharing options...
Luke 37022 Posted January 6, 2022 Share Posted January 6, 2022 You can't make playback wait for the extraction because on many users servers it can take a long time. Link to comment Share on other sites More sharing options...
nodiaque 31 Posted January 6, 2022 Author Share Posted January 6, 2022 An option for it then for those that which to wait for it? Honestly, I prefer waiting 30 sec for the extraction to have buffer then watching 3 minutes of foreign and not understanding. The problem occur even when seeking forward or backward since its on the fly. Link to comment Share on other sites More sharing options...
Luke 37022 Posted January 6, 2022 Share Posted January 6, 2022 It's not that simple because you can also change subtitles during playback, and that could trigger extractions as well. Link to comment Share on other sites More sharing options...
nodiaque 31 Posted January 6, 2022 Author Share Posted January 6, 2022 I do understand that, and I do also. But much like audio track can be switched and trigger transcoding, while there's a transcoding, users are waiting. Honestly, I don't get why waiting for video and audio transcoding is ok but not subs (which require way less power) Link to comment Share on other sites More sharing options...
Luke 37022 Posted January 6, 2022 Share Posted January 6, 2022 Because waiting for those things doesn't require a complete processing of the file up front. In other words, you can start playing right away as small portions are available. Subtitle extraction has to go over the entire file in order to perform the extraction, and for some this can take a long time. Link to comment Share on other sites More sharing options...
nodiaque 31 Posted January 6, 2022 Author Share Posted January 6, 2022 I though subtitle extraction was on the fly, meaning while it play. Why does it have to redo the extraction each time I seek then? Once it's done, shouldn't it be available for the whole duration until I stop playback? Link to comment Share on other sites More sharing options...
Luke 37022 Posted January 6, 2022 Share Posted January 6, 2022 Quote Why does it have to redo the extraction each time I seek then? It doesn't. Link to comment Share on other sites More sharing options...
nodiaque 31 Posted January 6, 2022 Author Share Posted January 6, 2022 Well, somethings not right because everytime I seek, there's another 30sec delay before the subs appear like at playback. Link to comment Share on other sites More sharing options...
Luke 37022 Posted January 7, 2022 Share Posted January 7, 2022 If the extraction completed, then it could just be slow performance of the ass subtitle renderer in the LG app. These TV's don't have a lot of horsepower. I know the developers of the library we're using have been doing a lot of work in this area recently so that's a good sign for future updates. Link to comment Share on other sites More sharing options...
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