[FFmpeg-user] libplacebo in 7.1.1 and vaapi decode/encode on rx550
Andrew Randrianasulu
randrianasulu at gmail.com
Sun Apr 27 20:26:41 EEST 2025
вс, 27 апр. 2025 г., 20:08 Ferdi Scholten <ferdi at sttc-nlp.nl>:
> > 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
>
Yes, I tried with those correct variables and vulkan hevc decoding worked!
But it seems that vaapi/vulkan interoperability for libplacebo need "drm
modifiers" and they not implemented for gfx8, only gfx9+ (and this leaves
Polaris out). And vulkan video encoding indeed does not work on my card
either ...
So libplacebo need to push frames up for sw encoder, and this slows whole
pipeline (for tonemapping).
RADV_PERFTEST=video_decode,video_encode time -p ./ffmpeg -init_hw_device
vulkan=vulkan -filter_hw_device vulkan -hwaccel vulkan -i
~/K38_sdcard1/Documents/iPhone11_4K-recorder_59.940HDR10.mov -vf
libplacebo=w=1920:h=1080:force_original_aspect_ratio=decrease:normalize_sar=true:upscaler=ewa_lanczos:downscaler=ewa_lanczos:colorspace=bt709:color_primaries=bt709:color_trc=bt709:range=tv
-c:a copy -c:v libx264 -f mp4 -benchmark
/dev/shm/ffmpeg-git-libplacebo-vulkan-2k.mp4
There is ffv1_vulkan encoder in ffmpeg.git, it worked but again was too
slow (6 fps for prescaled to 1080p image) for being practical ...
RADV_PERFTEST=video_decode,video_encode time -p ./ffmpeg -init_hw_device
vulkan=vulkan -filter_hw_device vulkan -hwaccel vulkan -i
~/K38_sdcard1/Documents/iPhone11_4K-recorder_59.940HDR10.mov -vf
libplacebo=format=yuv444p:w=1920:h=1080:force_original_aspect_ratio=decrease:normalize_sar=true:upscaler=ewa_lanczos:downscaler=ewa_lanczos:colorspace=bt709:color_primaries=bt709:color_trc=bt709:range=tv
-c:a copy -c:v ffv1_vulkan -slicecrc 0 -level 4 -strict -2 -async_depth 5
-slices_v 32 -slices_h 32 -f matroska -benchmark /dev/null
But something works already!
> 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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