[FFmpeg-user] libplacebo in 7.1.1 and vaapi decode/encode on rx550

[Ferdi Scholten]

> I am trying to explore new world of Vulkan. Just compiled vulkan-sdk
> 1.4.304 and thus  ffmpeg 7.1.1 with libplacebo and vulkan
> filters/hwaccels/encode.
>
> Because Vulkan decode for some reason does not work on my AMD RX550
> (polaris12) even with RADV_VIDEO_ENCODE=1 RADV_VIDEO_DECODE=1 I am
> trying to make libplacebo's tonemap cooperate with vaapi
>
> bash-5.1$ ./bin/ffmpeg711-vulkan  -init_hw_device vulkan  -hwaccel
> vaapi -hwaccel_output_format vaapi -i
> ~/K38_sdcard1/Documents/iPhone11_4K-recorder_59.940HDR10.mov -vf
> libplacebo=colorspace=bt709:color_primaries=bt709:color_trc=bt709:range=tv
> -c:a copy -c:v hevc_vulkan  -f avi  /dev/null
> ffmpeg version 7.1.1 Copyright (c) 2000-2025 the FFmpeg developers
>    built with gcc 11.2.0 (GCC)
>    configuration: --enable-opencl --disable-debug --enable-libx265
> --enable-libx264 --enable-gpl --enable-libplacebo --enable-vulkan
> --enable-libshaderc
>    libavutil      59. 39.100 / 59. 39.100
>    libavcodec     61. 19.101 / 61. 19.101
>    libavformat    61.  7.100 / 61.  7.100
>    libavdevice    61.  3.100 / 61.  3.100
>    libavfilter    10.  4.100 / 10.  4.100
>    libswscale      8.  3.100 /  8.  3.100
>    libswresample   5.  3.100 /  5.  3.100
>    libpostproc    58.  3.100 / 58.  3.100
> [aist#0:1/pcm_s16le @ 0xb1ff740] Guessed Channel Layout: stereo
> Input #0, mov,mp4,m4a,3gp,3g2,mj2, from
> '/home/guest/K38_sdcard1/Documents/iPhone11_4K-recorder_59.940HDR10.mov':
>    Metadata:
>      major_brand     : qt
>      minor_version   : 0
>      compatible_brands: qt
>      creation_time   : 2020-12-18T22:20:29.000000Z
>      com.apple.quicktime.creationdate: 2020-12-18T17:20:29-0500
>      com.apple.quicktime.location.ISO6709: +33.4233-084.5802/
>    Duration: 00:00:19.16, start: 0.000000, bitrate: 69140 kb/s
>    Stream #0:0[0x1](und): Video: hevc (Main 10) (hvc1 / 0x31637668),
> yuv420p10le(pc, bt2020nc/bt2020/smpte2084), 3840x2160, 64166 kb/s,
> 59.92 fps, 59.94 tbr, 600 tbn (default)
>        Metadata:
>          creation_time   : 2020-12-18T22:20:29.000000Z
>          handler_name    : Core Media Video
>          vendor_id       : [0][0][0][0]
>          encoder         : HEVC
>    Stream #0:1[0x2](und): Audio: pcm_s16le (lpcm / 0x6D63706C), 48000
> Hz, stereo, s16, 1536 kb/s (default)
>        Metadata:
>          creation_time   : 2020-12-18T22:20:29.000000Z
>          handler_name    : Core Media Audio
>          vendor_id       : [0][0][0][0]
> File '/dev/null' already exists. Overwrite? [y/N] y
> Stream mapping:
>    Stream #0:0 -> #0:0 (hevc (native) -> hevc (hevc_vulkan))
>    Stream #0:1 -> #0:1 (copy)
> Press [q] to stop, [?] for help
> There are 2 hardware devices. device vaapi0 of type vaapi is picked
> for filters by default. Set hardware device explicitly with the
> filter_hw_device option if device vaapi0 is not usable for filters.
> Impossible to convert between the formats supported by the filter
> 'graph -1 input from stream 0:0' and the filter 'auto_scale_0'
> [vf#0:0 @ 0xb1fe380] Error reinitializing filters!
> [vf#0:0 @ 0xb1fe380] Task finished with error code: -38 (Function not
> implemented)
> [vost#0:0/hevc_vulkan @ 0xb200200] Could not open encoder before EOF
> [vost#0:0/hevc_vulkan @ 0xb200200] Task finished with error code: -22
> (Invalid argument)
> [vost#0:0/hevc_vulkan @ 0xb200200] Terminating thread with return code
> -22 (Invalid argument)
> [vf#0:0 @ 0xb1fe380] Terminating thread with return code -38 (Function
> not implemented)
> [out#0/avi @ 0xb1e8d80] Nothing was written into output file, because
> at least one of its streams received no packets.
> frame=    0 fps=0.0 q=0.0 Lsize=       0KiB time=N/A bitrate=N/A speed=N/A
> Conversion failed!
>
> ow!
>
> And adding -filter_hw_device vulkan only result in
>
> ash-5.1$ ./bin/ffmpeg711-vulkan  -init_hw_device vulkan
> -filter_hw_device vulkan  -hwaccel vaapi -hwaccel_output_format vaapi
> -i ~/K38_sdcard1/Documents/iPhone11_4K-recorder_59.940HDR10.mov -vf
> libplacebo=colorspace=bt709:color_primaries=bt709:color_trc=bt709:range=tv
> -c:a copy -c:v hevc_vulkan  -f avi  /dev/null
> ffmpeg version 7.1.1 Copyright (c) 2000-2025 the FFmpeg developers
>    built with gcc 11.2.0 (GCC)
>    configuration: --enable-opencl --disable-debug --enable-libx265
> --enable-libx264 --enable-gpl --enable-libplacebo --enable-vulkan
> --enable-libshaderc
>    libavutil      59. 39.100 / 59. 39.100
>    libavcodec     61. 19.101 / 61. 19.101
>    libavformat    61.  7.100 / 61.  7.100
>    libavdevice    61.  3.100 / 61.  3.100
>    libavfilter    10.  4.100 / 10.  4.100
>    libswscale      8.  3.100 /  8.  3.100
>    libswresample   5.  3.100 /  5.  3.100
>    libpostproc    58.  3.100 / 58.  3.100
> Invalid filter device vulkan.
> Failed to set value 'vulkan' for option 'filter_hw_device': Invalid argument
> Error parsing global options: Invalid argument
>
> Any idea how to proceed?
>
have you set the following environment variables?
RADV_PERFTEST=video_encode
RADV_PERFTEST=video_decode

But it can also be that you're out of luck because somewhere I came 
across this (for an older version of FFmpeg:
It (vulkan decoding) doesn't work on Polaris: |0.339][e][ffmpeg/video] 
h264: Device does not support the VK_KHR_video_decode_queue extension!


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