playback is frozen on very high resolution video

[florinandrei]

See this folder:

https://drive.google.com/drive/folders/ ... WJZeDQzSUk

The sun-1080p video plays just fine in VLC. The sun-5k video gets stuck on the first frame. The cursor keeps advancing, but the player only shows the first frame. If I drag the cursor with the mouse, only then is the image updated to whatever frame the cursor falls on, but then it freezes again.

The videos were made with x264 using constant quality encoding at q=23. Frame rate is 60 fps. No audio track.

I'm using the latest VLC 2.2.6 on Windows 10. The laptop uses an AMD A8-7410 APU with AMD Radeon R5 graphics, at 2.20 GHz. It has 16 GB of RAM.

Windows Media Player is actually able to play the 5k video.

[Lotesdelere]

Are you using GPU hardware acceleration ?

[florinandrei]

Whatever the default is, that's what I'm using.

I don't even know where that flag is in the settings.

[Lotesdelere]

Try VLC 3.0.0 nightly build.

And set it to use DXVA:
Tools -> Preferences -> Video
Output = Automatic

Tools -> Preferences -> Input/Codecs
Hardware accelerated decoding = DXVA 2.0

Then save, exit and restart VLC.

[florinandrei]

I've downloaded vlc-3.0.0-20170728-0510

With the default settings, it's no different from v 2.x

With the settings you've indicated, there's a slight improvement: once every few seconds, the image is updated to the current frame. So, it's not completely frozen, but it's not the full frame rate either (not even close).

[Lotesdelere]

Works for me with VLC 3.0 even though DXVA doesn't kick in.

Please open Tools -> Messages (set Verbosity to 2) before you start the playback, and then paste the full resulting log here or on Pastebin.com if it's too long.

[florinandrei]

This is the log:

https://pastebin.com/uFFQ62Z8

[Jean-Baptiste Kempf]

@florinandrei: please test D3D11 video output in preferences and D3D11 video acceleration in preferences.

DxVA seems to refuse hw decoding:
dxva2 error: IDirectXVideoDecoderService_CreateVideoDecoder failed

[Jean-Baptiste Kempf]

Also, can you check if WMP is using DxVA (Use DxVAChecker to trace)