[vlc-devel] Slow OpenGL initialization

[Tristan Matthews]

On Mon, May 21, 2018 at 8:40 AM, Thomas Guillem <thomas at gllm.fr> wrote:
> And did you try forcing only EGL or GLX  ?
>
> On Mon, May 21, 2018, at 14:37, Thomas Guillem wrote:
>
>
> On Mon, May 21, 2018, at 14:25, Rémi Denis-Courmont wrote:
>
> Hello,
>
> I noticed that video output creation had become extremely slow on Linux with
> NVIDIA blob. It was always slow but it is much worse now. I am not sure if
> this comes from driver updates or OpenGL/VLC changes.

I've been hit by some pretty bad performance regressions after
updating the Nvidia driver on Debian Sid, this is the most information
I've found on the topic:
https://devtalk.nvidia.com/default/topic/1029484/linux/-various-all-distros-numerous-performance-amp-rendering-issues-on-390-25/11

-t

>
> It is especially visible with the wall splitter.
>
> Anyway, this sounds like a major problem if the video output is created
> after the audio output, as we will not have whole seconds of buffering to
> spare.
>
> No clue going forward at this point.
>
> Did anyone else experience that?
>
>
> 4.0 / 3.0 ?
>
> Is it still slow if you remove AV_PIX_FMT_VAAPI_VLD from the hwfmts enum in
> avcodec ?
>
>
> --
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> brièveté.
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