I was testing my movies samples and i noticed this, please someone can explain how can i put my hardware to play h264 movies like a windows?

Here the samples, same movie.

https://postimg.org/image/3kajum7uz/ - Windows
https://postimg.org/image/vmrnt03sn/ - Linux

Nvidia 970GTX G1 Gamming
Slackware 14.2

You might want to try the Nvidia proprietary drivers, which can be build from Slackbuilds.org.

Im using proprietary, but from source .run i play every game without problem, i dont think driver is the problem. But thanks for reply
Edit: i can encode using nvenc h264 or nvenc hvec without problems too.

Maybe hardware acceleration works with VLC.

Not working too, i forgot to mention this.

First off, I would probably recommend ditching gmplayer. It is mostly unmaintained and really isn't that great. You can still keep mplayer though, and I'd recommend a new frontend called SMPlayer. It works quite well and is simple enough that anyone can use it, but if you dig in, there's tons of options.

Now, onto your actual problem. You likely need to be using the vdpau video output. If you aren't using that, then you likely won't use graphic card acceleration for video decoding. I have no idea if gmplayer offers the ability to change your video output (but I know smplayer does), but let's get rid of the GUI frontends for a bit and just use mplayer from the command line.

First, I'd like to see the output from running just mplayer and your video file.

Then, I'd like to see the output of the same thing, but adding -vo vdpau and see if there's any errors or if there's a change in CPU usage.

2 members found this post helpful.

@bassmadrigal worked :-)

So the only way to play movies with graphics acceleration using MPlayer is using this command line? Not have another way to play automatic?
I will try smplayer too, many thanks.

You should be able to add vo=vdpau in either ~/.mplayer/config for a single user or /etc/mplayer/mplayer.conf for system-wide.

If you end up using smplayer, you can set it through Options -> Preferences -> General (left side navigation) -> Video (Tab) -> Output Driver

EDIT: SMPlayer might ignore the mplayer configs... I've never tried setting mplayer's configs since I found smplayer.

Im using smplayer, worked like a charm.
Good tip, is just a frontend for mplayer.
https://postimg.org/image/bs6cbya7h/

Here is my dear friend QMPlay2! He never causes problems if CUVID decoder is used. CUVID utilizes the binary drivers GPU and Video Engine (I can see it in nvidia-settings) and it seems to use less CPU.
https://slackbuilds.org/repository/1...?search=qmplay