Comment # 11 on bug 1140434 from Michael Zapf

When I unset the variable, vlc falls back to VDPAU with the mentioned half
resolution.

$ echo $VDPAU_DRIVER 
va_gl
$ unset VDPAU_DRIVER
$ vlc Videos/test1.mp4  -v

VLC media player 3.0.7.1 Vetinari (revision 3.0.7.1-0-gf3940db4af)
[00005623c4506750] main libvlc: VLC wird mit dem Standard-Interface ausgef�hrt.
Benutzen Sie 'cvlc', um VLC ohne Interface zu verwenden.
[00007fe61cc158b0] mp4 demux warning: elst box found
[00007fe61cc158b0] mp4 demux warning: STTS table of 1 entries
[00007fe61cc158b0] mp4 demux warning: CTTS table of 804 entries
[00007fe61cc158b0] mp4 demux warning: elst box found
[00007fe61cc158b0] mp4 demux warning: STTS table of 1 entries
[00007fe61cd48e20] faad decoder warning: decoded zero sample
libva info: VA-API version 1.4.0
libva info: va_getDriverName() returns 0
libva info: Trying to open /usr/lib64/dri/radeonsi_drv_video.so
libva info: Found init function __vaDriverInit_1_4
libva info: va_openDriver() returns 0
[00007fe60c001f50] glconv_vaapi_x11 gl error: vaDeriveImage: operation failed
[00007fe6180640c0] main video output error: video output creation failed
[00007fe61cc60300] main decoder error: failed to create video output
[00007fe61cc60300] avcodec decoder: Using G3DVL VDPAU Driver Shared Library
version 1.0 for hardware decoding
[00005623c45dafd0] pulse audio output warning: starting late (-11453 us)
[00007fe6180640c0] main video output warning: picture is too late to be
displayed (missing 46 ms)


Here is a part of a more verbose output: (-vv)

[00007f3cd8001370] main vout display debug: looking for vout display module
matching "any": 13 candidates
[00007f3cd8001370] main vout display debug: VoutDisplayEvent 'resize' 1280x720
[00007f3cd8001f50] main gl debug: looking for opengl module matching "any": 3
candidates
[00007f3cd407b000] main window debug: resized to 1280x720
[00007f3cd8001370] main vout display debug: VoutDisplayEvent 'resize' 1280x720
[00007f3cd8001f50] egl_x11 gl debug: EGL version 1.5 by Mesa Project
[00007f3cd8001f50] egl_x11 gl debug:  extensions: 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_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_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 
[00007f3cd8001f50] main gl debug: using opengl module "egl_x11"
[00005614910d0440] qt interface debug: Logical video size: 1280x720
[00007f3cd407b000] main window debug: resized to 1280x720
[00007f3cd8001370] main vout display debug: VoutDisplayEvent 'resize' 1280x720
[00007f3cd8130650] main generic debug: looking for glconv module matching
"any": 4 candidates
libva info: VA-API version 1.4.0
libva info: va_getDriverName() returns 0
libva info: Trying to open /usr/lib64/dri/radeonsi_drv_video.so
libva info: Found init function __vaDriverInit_1_4
libva info: va_openDriver() returns 0
[00007f3cd8130650] main generic debug: using glconv module "glconv_vaapi_x11"
[00007f3cd8001370] main vout display debug: using vout display module "gl"
[00007f3cd8001f50] glconv_vaapi_x11 gl error: vaDeriveImage: operation failed
[00007f3cd8001370] main vout display debug: removing module "gl"
[00007f3cd8130650] main generic debug: removing module "glconv_vaapi_x11"
[00007f3cd8001f50] main gl debug: removing module "egl_x11"
[00007f3cd40640c0] main video output error: video output creation failed
[00007f3cd40e6620] dbus_screensaver inhibit debug: got cookie 1210
[00007f3cd40e6620] main inhibit debug: removing module "dbus_screensaver"
[00007f3cd407b000] qt window debug: releasing video...
[00005614910d0440] qt interface debug: Video is not needed anymore
[00007f3cd4068040] main spu text debug: removing module "freetype"
[00007f3cd4119b50] main scale debug: removing module "yuvp"
[00007f3cd4072930] main scale debug: removing module "swscale"
[00007f3ce4c5fe70] main decoder error: failed to create video output
[00007f3ce4c5fe70] avcodec decoder debug: trying format vdpau
[00007f3cd4072930] main spu text debug: looking for text renderer module
matching "any": 3 candidates
[00007f3cd4072930] freetype spu text debug: Building font databases.
[00007f3cd4072930] freetype spu text debug: Took -8875 microseconds
[00007f3cd4072930] main spu text debug: using text renderer module "freetype"
[00007f3cd4119b50] main scale debug: looking for video converter module
matching "any": 23 candidates
[00007f3cd4119b50] swscale scale debug: 32x32 (32x32) chroma: YUVA -> 16x16
(16x16) chroma: RGBA with scaling using Bicubic (good quality)
[00007f3cd4119b50] main scale debug: using video converter module "swscale"
[00007f3cd4068040] main scale debug: looking for video converter module
matching "any": 23 candidates
[00007f3cd4068040] yuvp scale debug: YUVP to YUVA converter
[00007f3cd4068040] main scale debug: using video converter module "yuvp"
[00007f3cd40640c0] main video output debug: Deinterlacing available
[00007f3cd40640c0] main video output debug: deinterlace -1, mode auto,
is_needed 0
[00007f3cd4079280] main window debug: looking for vout window module matching
"qt,any": 6 candidates
[00007f3cd4079280] qt window debug: requesting video window...
[00007f3cd4079280] main window debug: using vout window module "qt"
[00007f3cd40db720] main inhibit debug: looking for inhibit module matching
"any": 2 candidates
[00007f3cd4079280] main window debug: resized to 1280x720
[00007f3cd40db720] dbus_screensaver inhibit debug: found service
org.freedesktop.ScreenSaver
[00007f3cd40db720] main inhibit debug: using inhibit module "dbus_screensaver"
[00007f3cd40640c0] main video output debug: Opening vout display wrapper
[00007f3cd82956f0] main vout display debug: looking for vout display module
matching "any": 13 candidates
[00007f3cd82956f0] main vout display debug: VoutDisplayEvent 'resize' 1280x720
[00007f3cd8297910] main gl debug: looking for opengl module matching "glx": 3
candidates
[00007f3cd8297910] glx gl debug: using GLX extension version 1.4
[00005614910d0440] qt interface debug: Logical video size: 1280x720
[00007f3cd4079280] main window debug: resized to 1280x720
[00007f3cd82956f0] main vout display debug: VoutDisplayEvent 'resize' 1280x720
[00007f3cd8297910] main gl debug: using opengl module "glx"
[00007f3cd8081e30] main generic debug: looking for glconv module matching
"any": 4 candidates
[00007f3cd8081e30] main generic debug: using glconv module "glconv_vdpau"
[00007f3cd82956f0] main vout display debug: using vout display module "gl"
[00007f3cd82956f0] main vout display debug: A filter to adapt decoder VDV0 to
display VDOR is needed
[00007f3cd82e6870] main filter debug: looking for video converter module
matching "any": 23 candidates
[00007f3cd82e6870] vdpau_chroma filter debug: using video mixer temporal
deinterlace feature
[00007f3cd82e6870] vdpau_chroma filter debug: using video mixer sharpness
feature
[00007f3cd82e6870] vdpau_chroma filter debug: using video mixer 5
[00007f3cd82e6870] main filter debug: using video converter module
"vdpau_chroma"
[00007f3cd82956f0] main vout display debug: Filter 'VDPAU' (0x7f3cd82e6870)
appended to chain
[00007f3cd40640c0] main video output debug: original format sz 1280x720, of
(0,0), vsz 1280x720, 4cc VDV0, sar 1:1, msk r0x0 g0x0 b0x0
[00007f3cd4072930] main spu text debug: removing module "freetype"
[00007f3cd4072930] main spu text debug: looking for text renderer module
matching "any": 3 candidates
[00007f3cd4072930] freetype spu text debug: Building font databases.
[00005614910ca2f0] dbus interface debug: Getting property Position
[00005614910d0440] qt interface debug: Logical video size: 1280x720
[00007f3cd4079280] main window debug: resized to 1280x720
[00007f3cd82956f0] main vout display debug: VoutDisplayEvent 'resize' 1280x720
[00007f3cd4072930] freetype spu text debug: Took -8176 microseconds
[00007f3cd4072930] main spu text debug: using text renderer module "freetype"
[00007f3cd40b60d0] main generic debug: looking for hw decoder module matching
"vdpau_avcodec": 3 candidates
[00007f3cd40b60d0] main generic debug: using hw decoder module "vdpau_avcodec"
[00007f3ce4c5fe70] avcodec decoder: Using G3DVL VDPAU Driver Shared Library
version 1.0 for hardware decoding