Re: mpv and estd and --vo=xv

[RVP <rvp%SDF.ORG@localhost>]

On Wed, 14 Jul 2021, Rhialto wrote:

> On the other hand, from there I found this description (I selected my
> cpu,
> https://ark.intel.com/content/www/us/en/ark/products/134896/intel-core-i5-9600k-processor-9m-cache-up-to-4-60-ghz.html
> and as explanation for Intel Turbo Boost Technology it has
>
>    Intel Turbo Boost Technology dynamically increases the processor's
>    frequency as needed by taking advantage of thermal and power headroom to
>    give you a burst of speed when you need it, and increased energy
>    efficiency when you don't.
>
> I haven't seen a listing of something named Speed Shift or similar yet.
> But from this one would think that it can both increase and decrease
> frequency and power.

That's what I thought too. But, one of our Mikes say it goes from
Processor Base freq. -> Max Turbo freq., while the other states
Turbo Boost is akin to a hidden p-state. I don't know what to make
out of all this. (In an ideal world, both Mikes would be correct.)

Getting back to the original topic, I've pulled together all the
things I needed to get mpv video playback on NetBSD to be (almost)
on par with Linux/FreeBSD. See if these help you (assuming the OS
ver. is 9.99.86 and the card is Intel):

1. Use intel (SNA) Xorg video driver. (glxgears, mpv --vo=gpu both
   coredump if the Xor video driver is `modesetting'.)

2. Create symlinks missing on 9.99.8x (only if using binary packages):

   (cd /usr/lib; ln -s libstdc++.so.9 libstdc++.so.7;
    cd /usr/X11R7/lib; ln -s libglapi.so.1 libglapi.so.0)

3. Make sure /usr/pkg/lib/dri/*_drv_video.so is present by
   installing a) intel-vaapi-driver for Intel cards, or
   b) MesaLib for other video cards.

4. Make sure DRI device perms. are correct. They should be, but
   if you switch from `intel' -> `modesetting' and back, the
   permissions change to `rw-r-----' instead of `rw-rw----'.

   Also ensure you are in the wheel group (standard for X):

   chmod g+w /dev/dri/card?

5. Make sure `hwdec=auto' is set in ~/.config/mpv/mpv.conf, and
   estd is turned off.

   Pass `--vo=gpu' to mpv when playing videos. The default `sdl' vo
   doesn't work well.

If HW video decoding is being done (this depends on the stream
and the decoding capabilities of your CPU/GPU), then mpv will
print something like:

    (+) Video --vid=1 (h264 1280x720 59.940fps)
    (+) Audio --aid=1 (aac 2ch 44100Hz)
    Using hardware decoding (vaapi-copy).
    AO: [sdl] 44100Hz stereo 2ch s32
    VO: [gpu] 1280x720 nv12

Note the `vaapi-copy' (intel) & `Pixel Format' above (also shown
with the `I' key when running): nv12 is a `native' pixel format.

Ctrl-h switches between HW and SW decoding.

When SW decoding, mpv shows:

    (+) Video --vid=1 (h264 1280x720 59.940fps)
    (+) Audio --aid=1 (aac 2ch 44100Hz)
    AO: [sdl] 44100Hz stereo 2ch s32
    VO: [gpu] 1280x720 yuv420p

Now the `Pixel Format' changes too yuv420p.


-RVP