Bug Report: Subtitle Loading Issues on Web-Based Platforms

[jacksen168 3]

Dear Emby Team,  

I’ve encountered an issue with subtitle loading when playing transcoded videos on web-based platforms (e.g., browsers). Specifically, subtitles often take a long time to load or sometimes fail to load entirely. This problem becomes especially noticeable when the playback device has a poor network connection.  

For example, even after 30 seconds of video playback, subtitles may still not appear, and in some cases, they don’t load at all before the video ends. The worse the network conditions, the longer the delay in subtitle loading.  

I’d like to note that this issue seems to be specific to web-based playback, as I haven’t observed it in the latest version of the Emby client.

 

 

Original (Chinese):

主题：错误报告：基于 Web 的平台上的字幕加载问题 

在基于 Web 的平台（例如浏览器）上播放转码后的视频时，我遇到了字幕加载问题。具体来说，字幕通常需要很长时间才能加载，或者有时无法完全加载。当播放设备的网络连接不佳时，此问题变得尤为明显。 

例如，即使在视频播放 30 秒后，字幕可能仍然不会显示，在某些情况下，字幕在视频结束前根本不会加载。网络状况越差，字幕加载延迟越长。 

我想指出的是，这个问题似乎特定于基于 Web 的播放，因为我还没有在最新版本的 Emby 客户端中观察到它。

[Luke 42077]

 

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

 

[jacksen168 3]

54 minutes ago, Luke said:

 

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

 

 

@LukeThank you for your response. After further testing, I’ve confirmed that the subtitle loading delay occurs for both embedded subtitles (within the video file) and external subtitle files.

To better demonstrate the issue, I’ve attached the server logs and a screen recording. During the recording, I limited the browser’s (via) network speed to 4 Mbps and played a 720p - 1 Mbps video to amplify the problem and make it more easily observable.

embyserver.txt

 

 

 

Please let me know if you need any additional information or further testing from my side. I’m happy to assist in resolving this issue.

 

Original (Chinese):

感谢您的回复。经过进一步测试，我确认嵌入式字幕（在视频文件中）和外部字幕文件都会出现字幕加载延迟。

为了更好地演示此问题，我附加了服务器日志和屏幕录像。在录制过程中，我将浏览器的（via）网络速度限制为 4 Mbps，并播放了 720p - 1 Mbps 的视频，以放大问题并使其更容易观察到。

如果您需要任何其他信息或我这边的进一步测试，请告诉我。我很乐意协助解决此问题。

[Luke 42077]

Hi, please attach the ffmpeg log as well. Thanks.

[jacksen168 3]

7 minutes ago, Luke said:

Hi, please attach the ffmpeg log as well. Thanks.

@LukeOkay, ffmpeg log is here. ffmpeg-transcode-70746783-9816-4597-854a-154d1745c931_1.txt

[Luke 42077]

Hi, have you updated to Emby Server 4.8.11? Has that helped?

[jacksen168 3]

2 hours ago, Luke said:

Hi, have you updated to Emby Server 4.8.11? Has that helped?

@LukeYes, I have updated my emby service to 4.8.11.0, but the problem still exists after testing. I will be happy to continue to help solve this problem if necessary.

 

Original (Chinese):

是的，我已成功将我的emby服务更新至4.8.11.0，但经过测试我发现问题依然存在。如有需要我很乐意继续为你提供帮助以解决该问题。

[Luke 42077]

@jacksen168we are looking into this. Thanks for reporting.