Playback of VP9.2 file not working

[janw]

Platform: Windows 10, VLC 3.0.0 from Windows Store, Intel Core i7-7600U CPU (Kaby Lake)

Playback of a video file downloaded from YouTube in 4K HDR (3840x2160), VP9 Profile 2 does not work in VLC 3.0 UWP from Windows Store. The video will load, sound (Vorbis) plays back fine but the video remains at the initial frame. Seeking works to some degree but will also stay at a keyframe.

The file can be downloaded from the here: https://kodi.wiki/view/Samples - 4K video #15: https://mega.nz/#!hJdFEIBI!uSOjZtkkjIVY ... f47pCtFvdQ

By the way: is it possible to view some codec information in VLC UWP and how do I get debug logs?

MediaInfo for the file:

General
Unique ID : 251126687948046497215851073260370426756 (0xBCED3DA613DE2254BD715C2199D27B84)
Complete name : C:\Users\J.Werner\Downloads\The World in HDR.mkv
Format : Matroska
Format version : Version 4 / Version 2
File size : 337 MiB
Duration : 2 min 34 s
Overall bit rate mode : Variable
Overall bit rate : 18.3 Mb/s
Encoded date : UTC 2016-11-08 02:38:04
Writing application : mkvmerge v9.5.0 ('Quiet Fire') 64bit
Writing library : libebml v1.3.4 + libmatroska v1.4.5

Video
ID : 1
Format : VP9
Codec ID : V_VP9
Duration : 2 min 34 s
Bit rate : 18.2 Mb/s
Width : 3 840 pixels
Height : 2 160 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 59.940 FPS
Color space : YUV
Bits/(Pixel*Frame) : 0.037
Stream size : 335 MiB (99%)
Language : English
Default : Yes
Forced : No
Color range : Full
Color primaries : BT.2020
Transfer characteristics : PQ
Matrix coefficients : BT.2020 non-constant

Audio
ID : 2
Format : Vorbis
Format settings, Floor : 1
Codec ID : A_VORBIS
Duration : 2 min 34 s
Bit rate mode : Variable
Bit rate : 128 kb/s
Channel(s) : 2 channels
Sampling rate : 44.1 kHz
Frame rate : 48.199 FPS (915 SPF)
Compression mode : Lossy
Stream size : 2.02 MiB (1%)
Writing application : Google
Language : English
Default : Yes
Forced : No

[janw]

Addition: playback of the same file (and also another 4K HDR VP9.2 file) does not work in VLC Win32 either (tried it with and without DXVA enabled).

[mfkl]

Hi janw,

Thanks for the report.

is it possible to view some codec information in VLC UWP and how do I get debug logs?

For the codec information, there isn't much info available as of yet when you right click (compared to the win32 version), but it' on my todo list. https://code.videolan.org/videolan/vlc-winrt/issues/201

For the debug logs, it's at

Code: Select all

C:\Users\{User}\AppData\Local\Packages\VideoLAN.VLC_xxxxx\LocalState

Thanks for the file, we'll look into it.

[robUx4]

This file is not decoded by the hardware decoder but in software. And you only see keyframes because it's too slow to decode the rest in time.