Warning: Hardware-accelerated subtitle-overlay is disabled

[frankmb 41]

Using the Emby Roku app I could not play an episode needing subtitle burn-in.

My hardware transcoding was not used and the software transcoding was too slow and worked very badly I think.

I think in the past the hardware transcoding would have been used and this woudl have worked.

embyserver.txt ffmpeg-transcode-4fe55f87-9e07-4db7-986f-76585be2193a_1.txt

[Happy2Play 9780]

Currently the only option is to install the Diagnostics plugin and uncheck that option but is a temporary workaround and will reset with every server restart.

[frankmb 41]

I see. This is the first time this happens. Is this a new restriction for hardware transcoding? Or maybe in the past my software transcoding could keep up... 

[Happy2Play 9780]

28 minutes ago, frankmb said:

I see. This is the first time this happens. Is this a new restriction for hardware transcoding? Or maybe in the past my software transcoding could keep up... 

I guess you could say new in 4.8 as previous versions did things differently.

[frankmb 41]

Thanks. Even after unchecking the disable hardware subtitle overlay, it still does not use hardware transcoding.

With my hardware, I cannot watch anime that need subtitle burn-in using the Roku app for playback anymore. So a pretty serious loss of functionality in my opinion!

New logs attached with the diagnostic option disabled.

 

ffmpeg-transcode-95566278-909d-4623-a1bf-7a774d208dc0_1.txt embyserver.txt

[Happy2Play 9780]

4 minutes ago, frankmb said:

Thanks. Even after unchecking the disable hardware subtitle overlay, it still does not use hardware transcoding.

With my hardware, I cannot watch anime that need subtitle burn-in using the Roku app for playback anymore. So a pretty serious loss of functionality in my opinion!

New logs attached with the diagnostic option disabled.

 

ffmpeg-transcode-95566278-909d-4623-a1bf-7a774d208dc0_1.txt 21.8 kB · 1 download embyserver.txt 105.74 kB · 0 downloads

But that log suggest you disable hardware acceleration also as log is limit to software only.

[frankmb 41]

No, under normal circumstances my hardware transcoding is active and normally works. See logs attached where I set Roku app to a lower playback quality of 480p to force transcoding.

 

embyserver (1).txt ffmpeg-transcode-ab264107-612b-4ace-86ef-67181b15d5df_1 (1).txt

[frankmb 41]

And it works if I play the exact same anime episode as my original post but I select no subtitles, then hardware transcoding works. See logs

embyserver.txt ffmpeg-transcode-5af831c6-d899-41e8-a330-b35748982f6f_1.txt

Edited May 12, 2024 by frankmb

[Happy2Play 9780]

Not sure as disabling the diagnostic option should not disable hardware also.

But yes 4.8 has introduced a lot of subtitle related issues compared to previous version.  And per other topics yes devs are looking into it.

[RanmaCanada 494]

What is your current hardware setup for your server? Maybe adding an inexpensive ARC card, like a 310 or a 380 could resolve your issue?

[frankmb 41]

I have a Nvidia GTX 1050 that handles hardware transcoding. The problem is that a transcode to burn in subtitles needed by the Roku client causes hardware transcoding to be disabled.

And my CPU is not fast enough for software transcoding

[Luke 42077]

To answer the question about the overlay transcoding, this is something experimental that we've been working on that we hope to have enabled by default in future updates. When it's ready of course. When it works, it should perform better. It's just not ready for all use cases yet and so that's why you have to enable it via the diagnostics plugin.

[GWTPqZp6b 50]

Any chance this setting could be preserved between restarts? 

[frankmb 41]

17 hours ago, Luke said:

To answer the question about the overlay transcoding, this is something experimental that we've been working on that we hope to have enabled by default in future updates. When it's ready of course. When it works, it should perform better. It's just not ready for all use cases yet and so that's why you have to enable it via the diagnostics plugin.

Thanks.

Though as I explained above, even after unchecking the disable hardware subtitle overlay in the Diagnostic plugin, it still does not use hardware transcoding.

[Luke 42077]

On 5/20/2024 at 6:13 PM, frankmb said:

Thanks.

Though as I explained above, even after unchecking the disable hardware subtitle overlay in the Diagnostic plugin, it still does not use hardware transcoding.

There might be cases when it can't. There are valid reasons for that.

The goal with the subtitle overlay is that eventually all subtitle burn in will use HWA. Or at least, the majority.