[FFmpeg-user] Failed setup for format vulkan: hwaccel initialisation returned error for Arc A750

[Terje J. Hanssen]

Hi,

I try to test Vulkan h264 or h265 decoding according to test command at
https://trac.ffmpeg.org/wiki/HWAccelIntro#Vulkan
ffmpeg -init_hw_device "vulkan=vk:0" -hwaccel vulkan 
-hwaccel_output_format vulkan -i INPUT -f null - -benchmark

but get the following output error:
[h264 @ 0x55952760cf40] Failed setup for format vulkan: hwaccel 
initialisation returned error.
or
[hevc @ 0x5580e96e8c80] Failed setup for format vulkan: hwaccel 
initialisation returned error.

Any suggestion how to solve it?

------------------------------

vulkaninfo | grep GPU
         GPU id = 0 (Intel(R) Arc(tm) A750 Graphics (DG2))
         GPU id = 1 (llvmpipe (LLVM 18.1.8, 256 bits))
         GPU id = 0 (Intel(R) Arc(tm) A750 Graphics (DG2))
         GPU id = 1 (llvmpipe (LLVM 18.1.8, 256 bits))
         GPU id = 0 (Intel(R) Arc(tm) A750 Graphics (DG2))
         GPU id = 1 (llvmpipe (LLVM 18.1.8, 256 bits))
GPU id : 0 (Intel(R) Arc(tm) A750 Graphics (DG2)):
GPU id : 1 (llvmpipe (LLVM 18.1.8, 256 bits)):
GPU0:
     deviceType        = PHYSICAL_DEVICE_TYPE_DISCRETE_GPU
GPU1:


export ANV_VIDEO_DECODE=1

vulkaninfo | grep VK_KHR_video
     VK_KHR_video_decode_h264                      : extension revision 9
     VK_KHR_video_decode_h265                      : extension revision 8
     VK_KHR_video_decode_queue                     : extension revision 8
     VK_KHR_video_queue                            : extension revision 8


MESA_VK_DEVICE_SELECT=list vulkaninfo
selectable devices:
   GPU 0: 8086:56a1 "Intel(R) Arc(tm) A750 Graphics (DG2)" discrete GPU 
0000:03:00.0
   GPU 1: 10005:0 "llvmpipe (LLVM 18.1.8, 256 bits)" CPU 0000:00:00.0

This is on openSUSE Tumbleweed-Slowroll with ffmpeg-7.0, Intel, Vulkan, 
Mesa drivers etc.

Full ffmpeg sample output as follows:

ffmpeg -hide_banner -init_hw_device "vulkan=vk:0" -hwaccel vulkan 
-hwaccel_output_format vulkan -i h264_10bit_yuv422p10le.mp4 -f null - 
-benchmark
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'h264_10bit_yuv422p10le.mp4':
   Metadata:
     major_brand     : isom
     minor_version   : 512
     compatible_brands: isomiso2avc1mp41
     encoder         : Lavf61.1.100
   Duration: 00:01:11.20, start: 0.000000, bitrate: 9366 kb/s
   Stream #0:0[0x1](und): Video: h264 (High 4:2:2) (avc1 / 0x31637661), 
yuv422p10le(pc, smpte170m/unknown/unknown, top first), 1920x1080 [SAR 
1:1 DAR 16:9], 9364 kb/s, 25 fps, 25 tbr, 12800 tbn (default)
       Metadata:
         handler_name    : VideoHandler
         vendor_id       : [0][0][0][0]
Stream mapping:
   Stream #0:0 -> #0:0 (h264 (native) -> wrapped_avframe (native))
Press [q] to stop, [?] for help
[h264 @ 0x55952760cf40] Failed setup for format vulkan: hwaccel 
initialisation returned error.
Output #0, null, to 'pipe:':
   Metadata:
     major_brand     : isom
     minor_version   : 512
     compatible_brands: isomiso2avc1mp41
     encoder         : Lavf61.1.100
   Stream #0:0(und): Video: wrapped_avframe, yuv422p10le(pc, 
smpte170m/unknown/unknown, top coded first (swapped)), 1920x1080 [SAR 
1:1 DAR 16:9], q=2-31, 200 kb/s, 25 fps, 25 tbn (default)
       Metadata:
         handler_name    : VideoHandler
         vendor_id       : [0][0][0][0]
         encoder         : Lavc61.3.100 wrapped_avframe
[out#0/null @ 0x5595275c8f40] video:765KiB audio:0KiB subtitle:0KiB 
other streams:0KiB global headers:0KiB muxing overhead: unknown
frame= 1780 fps=767 q=-0.0 Lsize=N/A time=00:01:11.20 bitrate=N/A 
speed=30.7x
bench: utime=20.985s stime=0.185s rtime=2.319s
bench: maxrss=391544KiB