Skip to content

Shader error playing 4k video encoded with hevc and yuv420p10le on Kubuntu 20.10

After upgrading to Kubuntu 20.10 from Kubuntu 20.04, VLC is unable to play some video files that are 2160p, encoded with HEVC and with yuv420p10le colors.

VLC is unable to output the video content to egl_x11, regular x11 output (non-accelerated) works fine, the sound also works fine. This bug does not occur with every 2160p, HEVC, yuv420p10le video file, only some of them, but I can't determine what particular element causes this bug.

I can provide a sample of video files, which cause this bug. The bug did not occur with previous version of VLC that came with Kubuntu 20.04, the very same files were played without a problem, on the very same hardware.

Using a vanilla VLC with default settings still causes this bug.

For brevity I'm only providing the relevant parts of these outputs:

VLC version:

VLC media player 3.0.11.1 Vetinari (revision 3.0.11.1-0-g52483f3ca2)

vlc -vvv example.mkv

[00007f3814003f10] egl_x11 gl debug: EGL version 1.5 by Mesa Project
[00007f3814003f10] egl_x11 gl debug:  extensions: EGL_ANDROID_blob_cache EGL_ANDROID_native_fence_sync EGL_CHROMIUM_sync_control EGL_EXT_buffer_age EGL_EXT_create_context_robustness EGL_EXT_image_dma_buf_import EGL_EXT_image_dma_buf_import_modifiers EGL_EXT_swap_buffers_with_damage EGL_KHR_cl_event2 EGL_KHR_config_attribs EGL_KHR_create_context EGL_KHR_create_context_no_error EGL_KHR_fence_sync EGL_KHR_get_all_proc_addresses EGL_KHR_gl_colorspace EGL_KHR_gl_renderbuffer_image EGL_KHR_gl_texture_2D_image EGL_KHR_gl_texture_3D_image EGL_KHR_gl_texture_cubemap_image EGL_KHR_image EGL_KHR_image_base EGL_KHR_image_pixmap EGL_KHR_no_config_context EGL_KHR_reusable_sync EGL_KHR_surfaceless_context EGL_KHR_swap_buffers_with_damage EGL_EXT_pixel_format_float EGL_KHR_wait_sync EGL_MESA_configless_context EGL_MESA_drm_image EGL_MESA_image_dma_buf_export EGL_MESA_query_driver EGL_NOK_texture_from_pixmap EGL_WL_bind_wayland_display 
[00007f3814003f10] main gl debug: using opengl module "egl_x11"
[00007f3814003f10] gl gl: Initialized libplacebo v2.72.0 (API v72)
[00007f381416e050] main generic debug: looking for glconv module matching "any": 4 candidates
libva info: VA-API version 1.8.0
libva info: Trying to open /usr/lib/x86_64-linux-gnu/dri/radeonsi_drv_video.so
libva info: Found init function __vaDriverInit_1_8
libva info: va_openDriver() returns 0
mesa: for the --simplifycfg-sink-common option: may only occur zero or one times!
mesa: for the --global-isel-abort option: may only occur zero or one times!
mesa: for the --amdgpu-atomic-optimizations option: may only occur zero or one times!
mesa: for the --structurizecfg-skip-uniform-regions option: may only occur zero or one times!
[00007f381416e050] main generic debug: using glconv module "glconv_vaapi_x11"
[00007f3814003f10] gl gl error: shader 0: 0:19(13): error: no matching function for call to `mix(vec3, vec3, bvec3)'; candidates are:
0:19(13): error:    float mix(float, float, float)
0:19(13): error:    vec2 mix(vec2, vec2, float)
0:19(13): error:    vec3 mix(vec3, vec3, float)
0:19(13): error:    vec4 mix(vec4, vec4, float)
0:19(13): error:    vec2 mix(vec2, vec2, vec2)
0:19(13): error:    vec3 mix(vec3, vec3, vec3)
0:19(13): error:    vec4 mix(vec4, vec4, vec4)

[00007f3814003f10] gl gl error: shader program: error: linking with uncompiled/unspecialized shader
[00007f3814003f10] gl gl error: Unable to use program
[00007f381416e050] main generic debug: removing module "glconv_vaapi_x11"
[00007f3814003f10] gl gl warning: could not init tex converter for VAO0
[00007f3814003f10] main gl debug: removing module "egl_x11"
[00007f38140013b0] main vout display debug: no vout display modules matched
[00007f381c5c4c20] main video output error: video output creation failed

lspci

29:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Ellesmere [Radeon RX 470/480/570/570X/580/580X/590] (rev ef)
29:00.1 Audio device: Advanced Micro Devices, Inc. [AMD/ATI] Ellesmere HDMI Audio [Radeon RX 470/480 / 570/580/590]

uname -a

Linux kubuntu-pc 5.8.0-33-generic [#36](https://code.videolan.org/videolan/vlc/-/issues/36)-Ubuntu SMP Wed Dec 9 09:14:40 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux

ffprobe example.mkv

ffprobe version 4.2.4-1ubuntu0.1 Copyright (c) 2007-2020 the FFmpeg developers
  built with gcc 9 (Ubuntu 9.3.0-10ubuntu2)
  configuration: --prefix=/usr --extra-version=1ubuntu0.1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opencl --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-nvenc --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared
  libavutil      56. 31.100 / 56. 31.100
  libavcodec     58. 54.100 / 58. 54.100
  libavformat    58. 29.100 / 58. 29.100
  libavdevice    58.  8.100 / 58.  8.100
  libavfilter     7. 57.100 /  7. 57.100
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale      5.  5.100 /  5.  5.100
  libswresample   3.  5.100 /  3.  5.100
  libpostproc    55.  5.100 / 55.  5.100
Input [#0](https://code.videolan.org/videolan/vlc/-/issues/0), matroska,webm, from 'example.mkv':
  Metadata:
    encoder         : libebml v1.4.0 + libmatroska v1.6.0
    creation_time   : 2020-11-07T15:22:14.000000Z
  Duration: 00:54:18.08, start: 0.000000, bitrate: 20334 kb/s
    Chapter [#0](https://code.videolan.org/videolan/vlc/-/issues/0):0: start 0.000000, end 590.960000
    Metadata:
      title           : Chapter 1
    Chapter [#0](https://code.videolan.org/videolan/vlc/-/issues/0):1: start 590.960000, end 1255.800000
    Metadata:
      title           : Chapter 2
    Chapter [#0](https://code.videolan.org/videolan/vlc/-/issues/0):2: start 1255.800000, end 1860.920000
    Metadata:
      title           : Chapter 3
    Chapter [#0](https://code.videolan.org/videolan/vlc/-/issues/0):3: start 1860.920000, end 2466.560000
    Metadata:
      title           : Chapter 4
    Chapter [#0](https://code.videolan.org/videolan/vlc/-/issues/0):4: start 2466.560000, end 2930.400000
    Metadata:
      title           : Chapter 5
    Chapter [#0](https://code.videolan.org/videolan/vlc/-/issues/0):5: start 2930.400000, end 3258.080000
    Metadata:
      title           : Chapter 6
    Stream [#0](https://code.videolan.org/videolan/vlc/-/issues/0):0: Video: hevc (Main 10), yuv420p10le(tv, bt2020nc/bt2020/arib-std-b67), 3840x2160 [SAR 1:1 DAR 16:9], 25 fps, 25 tbr, 1k tbn, 25 tbc (default)
    Metadata:
      BPS-eng         : 18597593
      DURATION-eng    : 00:54:18.080000000
      NUMBER_OF_FRAMES-eng: 81449
      NUMBER_OF_BYTES-eng: 7574056055
      _STATISTICS_WRITING_APP-eng: mkvmerge v48.0.0 ('Fortress Around Your Heart') 64-bit
      _STATISTICS_WRITING_DATE_UTC-eng: 2020-11-07 15:22:14
      _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
    Stream [#0](https://code.videolan.org/videolan/vlc/-/issues/0):1(eng): Audio: dts (DTS-HD MA), 48000 Hz, 5.1(side), s16p (default)
    Metadata:
      BPS-eng         : 1733591
      DURATION-eng    : 00:54:17.856000000
      NUMBER_OF_FRAMES-eng: 305424
      NUMBER_OF_BYTES-eng: 705974092
      _STATISTICS_WRITING_APP-eng: mkvmerge v48.0.0 ('Fortress Around Your Heart') 64-bit
      _STATISTICS_WRITING_DATE_UTC-eng: 2020-11-07 15:22:14
      _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
    Stream [#0](https://code.videolan.org/videolan/vlc/-/issues/0):2(eng): Subtitle: subrip
    Metadata:
      BPS-eng         : 44
      DURATION-eng    : 00:53:49.720000000
      NUMBER_OF_FRAMES-eng: 614
      NUMBER_OF_BYTES-eng: 17994
      _STATISTICS_WRITING_APP-eng: mkvmerge v48.0.0 ('Fortress Around Your Heart') 64-bit
      _STATISTICS_WRITING_DATE_UTC-eng: 2020-11-07 15:22:14
      _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
    Stream [#0](https://code.videolan.org/videolan/vlc/-/issues/0):3(eng): Subtitle: subrip
    Metadata:
      title           : SDH
      BPS-eng         : 47
      DURATION-eng    : 00:53:49.720000000
      NUMBER_OF_FRAMES-eng: 697
      NUMBER_OF_BYTES-eng: 19168
      _STATISTICS_WRITING_APP-eng: mkvmerge v48.0.0 ('Fortress Around Your Heart') 64-bit
      _STATISTICS_WRITING_DATE_UTC-eng: 2020-11-07 15:22:14
      _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
Edited by Rémi Denis-Courmont
To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information

VideoLAN code repository instance