[FFmpeg-user] Using a AMD Radeon RX5xx with ffmpeg

Dennis Mungai dmngaie at gmail.com
Wed Jul 25 07:29:21 EEST 2018


Also, see this: https://www.x.org/wiki/RadeonFeature/

For term disambiguation:
https://www.reddit.com/r/archlinux/comments/6la6n5/trying_to_understand_drm_dri_mesa_radeon_gallium/



On 25 July 2018 at 05:16, Dennis Mungai <dmngaie at gmail.com> wrote:

> From what I can gather, AMD's driver implementation for VAAPI (gallium?
> through mesa) is a work in progress, and compared to i915 (intel's), is
> quite behind.
>
> On your system, are you able to build FFmpeg to utilize OMX IL? AMD has
> support for it via the VCE block. See this for an example on enabling it:
> https://github.com/legotheboss/YouTube-files/wiki/(RPi)-Compile-FFmpeg-
> with-the-OpenMAX-H.264-GPU-acceleration
>
> The guide was written for the rPI, but what we're interested in is OpenMAX
> bellagio and the configuration switches that enable OpenMAX IL encoders.
>
>
>
> On 24 July 2018 at 12:01, Lukas Obermann <obermann.lukas at gmail.com> wrote:
>
>> Hello Dennis,
>>
>> thank you for your help! Much appreciate it.
>>
>> Using your command I get a 1.9x speed. So a slight improvement, but not
>> much.
>> I pasted the debug output here, maybe you can see something usefull?
>> https://pastebin.com/W0KKjZbN <https://pastebin.com/W0KKjZbN>
>>
>> ad 1. Yes, there is the onboard intel device and 6 of those RX570 that in
>> the end I want to have all transcode stuff in parallel.
>>
>> lukas at transcoder:~$ vainfo --display drm --device /dev/dri/card1
>> libva info: VA-API version 1.1.0
>> libva info: va_getDriverName() returns 0
>> libva info: Trying to open /usr/lib/x86_64-linux-gnu/dri/
>> radeonsi_drv_video.so
>> libva info: Found init function __vaDriverInit_1_1
>> libva info: va_openDriver() returns 0
>> vainfo: VA-API version: 1.1 (libva 2.1.0)
>> vainfo: Driver version: mesa gallium vaapi
>> vainfo: Supported profile and entrypoints
>>       VAProfileMPEG2Simple            : VAEntrypointVLD
>>       VAProfileMPEG2Main              : VAEntrypointVLD
>>       VAProfileVC1Simple              : VAEntrypointVLD
>>       VAProfileVC1Main                : VAEntrypointVLD
>>       VAProfileVC1Advanced            : VAEntrypointVLD
>>       VAProfileH264ConstrainedBaseline: VAEntrypointVLD
>>       VAProfileH264ConstrainedBaseline: VAEntrypointEncSlice
>>       VAProfileH264Main               : VAEntrypointVLD
>>       VAProfileH264Main               : VAEntrypointEncSlice
>>       VAProfileH264High               : VAEntrypointVLD
>>       VAProfileH264High               : VAEntrypointEncSlice
>>       VAProfileHEVCMain               : VAEntrypointVLD
>>       VAProfileHEVCMain10             : VAEntrypointVLD
>>       VAProfileJPEGBaseline           : VAEntrypointVLD
>>       VAProfileNone                   : VAEntrypointVideoProc
>>
>> lukas at transcoder:~$ ls -la /dev/dri/
>> total 0
>> drwxr-xr-x   3 root root       340 Jul 23 15:47 .
>> drwxr-xr-x  19 root root      5020 Jul 23 15:47 ..
>> drwxr-xr-x   2 root root       320 Jul 23 15:47 by-path
>> crw-rw----+  1 root video 226,   0 Jul 23 15:47 card0
>> crw-rw----+  1 root video 226,   1 Jul 23 15:47 card1
>> crw-rw----+  1 root video 226,   2 Jul 23 15:47 card2
>> crw-rw----+  1 root video 226,   3 Jul 23 15:47 card3
>> crw-rw----+  1 root video 226,   4 Jul 23 15:47 card4
>> crw-rw----+  1 root video 226,   5 Jul 23 15:47 card5
>> crw-rw----+  1 root video 226,   6 Jul 23 15:47 card6
>> crw-rw----+  1 root video 226, 128 Jul 23 15:47 renderD128
>> crw-rw----+  1 root video 226, 129 Jul 23 15:47 renderD129
>> crw-rw----+  1 root video 226, 130 Jul 23 15:47 renderD130
>> crw-rw----+  1 root video 226, 131 Jul 23 15:47 renderD131
>> crw-rw----+  1 root video 226, 132 Jul 23 15:47 renderD132
>> crw-rw----+  1 root video 226, 133 Jul 23 15:47 renderD133
>> crw-rw----+  1 root video 226, 134 Jul 23 15:47 renderD134
>>
>>
>> ad 2. ok, understand. Is there a benefit of doing it that way?
>>
>> ad 3. I have done two tests now with only the decoder running, which are
>> confusing me now even more.
>>
>> So running following command:
>> ffmpeg -init_hw_device vaapi=amd:/dev/dri/renderD129 -hwaccel vaapi
>> -hwaccel_output_format vaapi -hwaccel_device amd -filter_hw_device amd -i
>> fs_experiental_method.avi  -f null -
>>
>> Results in ~ 12x speed
>> frame= 5824 fps=340 q=-0.0 Lsize=N/A time=00:03:14.47 bitrate=N/A
>> speed=11.4x
>>
>> But, using the CPU (a dual core pentium from last year)
>> ffmpeg -i fs_experiental_method.avi  -f null -
>>
>> Results in ~ 14x speed
>> frame=10570 fps=408 q=-0.0 Lsize=N/A time=00:05:52.90 bitrate=N/A
>> speed=13.6x
>>
>> Of course the vaapi one uses only like 10% of CPU while the CPU one uses
>> 100%.
>>
>> The graph looks like this for vaapi:
>>
>> [graph_1_in_0_1 @ 0x557f5d1cd5c0] Setting 'time_base' to value '1/32000'
>> [graph_1_in_0_1 @ 0x557f5d1cd5c0] Setting 'sample_rate' to value '32000'
>> [graph_1_in_0_1 @ 0x557f5d1cd5c0] Setting 'sample_fmt' to value 'fltp'
>> [graph_1_in_0_1 @ 0x557f5d1cd5c0] Setting 'channel_layout' to value '0x4'
>> [graph_1_in_0_1 @ 0x557f5d1cd5c0] tb:1/32000 samplefmt:fltp
>> samplerate:32000 chlayout:0x4
>> [format_out_0_1 @ 0x557f5d29fe40] Setting 'sample_fmts' to value 's16'
>> [format_out_0_1 @ 0x557f5d29fe40] auto-inserting filter
>> 'auto_resampler_0' between the filter 'Parsed_anull_0' and the filter
>> 'format_out_0_1'
>> [AVFilterGraph @ 0x557f5d1ceec0] query_formats: 4 queried, 6 merged, 3
>> already done, 0 delayed
>> [auto_resampler_0 @ 0x557f5d2be600] [SWR @ 0x557f5d1d8200] Using fltp
>> internally between filters
>> [auto_resampler_0 @ 0x557f5d2be600] ch:1 chl:mono fmt:fltp r:32000Hz ->
>> ch:1 chl:mono fmt:s16 r:32000Hz
>> [graph 0 input from stream 0:0 @ 0x557f5d2c1e40] Setting 'video_size' to
>> value '1920x1080'
>> [graph 0 input from stream 0:0 @ 0x557f5d2c1e40] Setting 'pix_fmt' to
>> value '46'
>> [graph 0 input from stream 0:0 @ 0x557f5d2c1e40] Setting 'time_base' to
>> value '1/30'
>> [graph 0 input from stream 0:0 @ 0x557f5d2c1e40] Setting 'pixel_aspect'
>> to value '0/1'
>> [graph 0 input from stream 0:0 @ 0x557f5d2c1e40] Setting 'sws_param' to
>> value 'flags=2'
>> [graph 0 input from stream 0:0 @ 0x557f5d2c1e40] Setting 'frame_rate' to
>> value '30/1'
>> [graph 0 input from stream 0:0 @ 0x557f5d2c1e40] w:1920 h:1080
>> pixfmt:vaapi_vld tb:1/30 fr:30/1 sar:0/1 sws_param:flags=2
>> [AVFilterGraph @ 0x557f5d17e480] query_formats: 3 queried, 2 merged, 0
>> already done, 0 delayed
>>
>> and like this for the cpu:
>>
>> [graph_1_in_0_1 @ 0x55986d1cab40] Setting 'time_base' to value '1/32000'
>> [graph_1_in_0_1 @ 0x55986d1cab40] Setting 'sample_rate' to value '32000'
>> [graph_1_in_0_1 @ 0x55986d1cab40] Setting 'sample_fmt' to value 'fltp'
>> [graph_1_in_0_1 @ 0x55986d1cab40] Setting 'channel_layout' to value '0x4'
>> [graph_1_in_0_1 @ 0x55986d1cab40] tb:1/32000 samplefmt:fltp
>> samplerate:32000 chlayout:0x4
>> [format_out_0_1 @ 0x55986d19c740] Setting 'sample_fmts' to value 's16'
>> [format_out_0_1 @ 0x55986d19c740] auto-inserting filter
>> 'auto_resampler_0' between the filter 'Parsed_anull_0' and the filter
>> 'format_out_0_1'
>> [AVFilterGraph @ 0x55986d090fc0] query_formats: 4 queried, 6 merged, 3
>> already done, 0 delayed
>> [auto_resampler_0 @ 0x55986d1ab680] [SWR @ 0x55986d0cd740] Using fltp
>> internally between filters
>> [auto_resampler_0 @ 0x55986d1ab680] ch:1 chl:mono fmt:fltp r:32000Hz ->
>> ch:1 chl:mono fmt:s16 r:32000Hz
>> [graph 0 input from stream 0:0 @ 0x55986d15f2c0] Setting 'video_size' to
>> value '1920x1080'
>> [graph 0 input from stream 0:0 @ 0x55986d15f2c0] Setting 'pix_fmt' to
>> value '0'
>> [graph 0 input from stream 0:0 @ 0x55986d15f2c0] Setting 'time_base' to
>> value '1/30'
>> [graph 0 input from stream 0:0 @ 0x55986d15f2c0] Setting 'pixel_aspect'
>> to value '0/1'
>> [graph 0 input from stream 0:0 @ 0x55986d15f2c0] Setting 'sws_param' to
>> value 'flags=2'
>> [graph 0 input from stream 0:0 @ 0x55986d15f2c0] Setting 'frame_rate' to
>> value '30/1'
>> [graph 0 input from stream 0:0 @ 0x55986d15f2c0] w:1920 h:1080
>> pixfmt:yuv420p tb:1/30 fr:30/1 sar:0/1 sws_param:flags=2
>> [AVFilterGraph @ 0x55986d196c40] query_formats: 3 queried, 2 merged, 0
>> already done, 0 delayed
>>
>>
>> I find it very strange that CPU decoding is faster then GPU decoding. Or
>> maybe is it a bottleneck? I am a bit lost right now I have to say.
>>
>>
>>
>> > On 23.07.2018, at 22:51, Dennis Mungai <dmngaie at gmail.com> wrote:
>> >
>> > Hello there,
>> >
>> > Here's something you can try:
>> >
>> > ffmpeg -init_hw_device vaapi=amd:/dev/dri/renderD129 -hwaccel vaapi
>> > -hwaccel_output_format vaapi -hwaccel_device amd -filter_hw_device amd
>> -i
>> > fs_experiental_method.avi -vf 'format=nv12|vaapi,hwupload' -y -c:v
>> > h264_vaapi -qp:v 21 -sei +identifier+timing+recovery_point -profile:v
>> main
>> > -level 4 output.avi
>> >
>> > Assumptions made:
>> >
>> > 1. You have another GPU on the system. See the DRI device you
>> highlighted
>> > (/dev/dri/card1) is implied to be the second render node because the
>> first
>> > ordinal device would have been /dev/dri/card0, mapped to
>> > /dev/dri/renderD128.
>> >
>> > Confirm this by providing the output of:
>> >
>> > (a). vainfo
>> > (b). ls -al /dev/dri/
>> >
>> > 2. We explicitly initialize and name the hardware device
>> > (/dev/dri/renderD129) to 'amd' and pass it to both the decoder, encoder
>> and
>> > the video filtergraph.
>> >
>> > 3. Observe the video filter graph. Here's what it does: The decoder will
>> > output either vaapi surfaces (if the hwaccel is usable) or software
>> frames
>> > (if it isn't). In the first case, it matches the vaapi format and
>> hwupload
>> > does nothing (it passes through hardware frames unchanged). In the
>> second
>> > case, it matches the nv12 format and converts whatever the input is to
>> > that, then uploads.
>> >
>> > This is done for safety reasons: Either way, the encoder will run.
>> However,
>> > depending on the path chosen (upload to memory vs native VAAPI hwdec),
>> your
>> > performance may vary.
>> >
>> > Reference used:
>> >
>> > 1. The VAAPI entry on FFmpeg wiki:
>> > https://trac.ffmpeg.org/wiki/Hardware/VAAPI
>> >
>> > 2. The VAAPI encoders entry in the docs:
>> > http://www.ffmpeg.org/ffmpeg-codecs.html#VAAPI-encoders
>> >
>> > On 23 July 2018 at 22:30, Lukas Obermann <obermann.lukas at gmail.com>
>> wrote:
>> >
>> >> Hi all,
>> >>
>> >> I want to use a RX570 for transcoding with ffmpeg. Have been looking
>> into
>> >> this for some time now and testing around various things.
>> >> I use Ubuntu 18.04 and I have it running with VAAPI. But the
>> performance
>> >> is not good imo. For a 1080p file I only get like 1.8x speed. I was
>> >> expecting something around 6x to 8x.
>> >> Is VAAPI the right way to go here? I see that AMF is not yet ready for
>> >> linux and VDPAU only support decoding, not encoding.
>> >>
>> >> Following is the command:
>> >> ffmpeg -hwaccel vaapi -vaapi_device /dev/dri/card1
>> -hwaccel_output_format
>> >> vaapi -i fs_experiental_method.avi -y -c:v h264_vaapi -profile:v main
>> >> output.avi
>> >>
>> >> ffmpeg version n4.0.2
>> >> mesa 18
>> >> amdgpu-pro-18.20-606296
>> >> libva: VA-API version 1.1.0
>> >>
>> >> And here below the non-debug output of the command, to show the
>> formats.
>> >> I would appreciate any help on this.
>> >>
>> >> Thanks!
>> >> Lukas
>> >>
>> >>
>> >> ffmpeg version n4.0.2-2 Copyright (c) 2000-2018 the FFmpeg developers
>> >>  built with gcc 7 (Ubuntu 7.3.0-16ubuntu3)
>> >>  configuration: --prefix=/usr --extra-version=2 --toolchain=hardened
>> >> --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-l
>> inux-gnu
>> >> --extra-cflags=-I/usr/local/include --extra-ldflags=-L/usr/local/lib
>> >> --enable-gpl --disable-stripping --enable-avresample --enable-avisynth
>> >> --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray
>> >> --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite
>> >> --enable-libfontconfig --enable-libfreetype --enable-libfribidi
>> >> --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa
>> >> --enable-libopenjpeg --enable-libopenmpt --enable-libopus
>> --enable-libpulse
>> >> --enable-librubberband --enable-librsvg --enable-libshine
>> >> --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh
>> >> --enable-libtheora --enable-libtwolame --enable-libvorbis
>> --enable-libvpx
>> >> --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2
>> >> --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx
>> >> --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394
>> >> --enable-libdrm --enable-libiec61883 --enable-chromaprint
>> --enable-frei0r
>> >> --enable-libx264 --enable-shared --enable-vaapi --enable-vdpau
>> >>  libavutil      56. 14.100 / 56. 14.100
>> >>  libavcodec     58. 18.100 / 58. 18.100
>> >>  libavformat    58. 12.100 / 58. 12.100
>> >>  libavdevice    58.  3.100 / 58.  3.100
>> >>  libavfilter     7. 16.100 /  7. 16.100
>> >>  libavresample   4.  0.  0 /  4.  0.  0
>> >>  libswscale      5.  1.100 /  5.  1.100
>> >>  libswresample   3.  1.100 /  3.  1.100
>> >>  libpostproc    55.  1.100 / 55.  1.100
>> >> Input #0, avi, from 'fs_experiental_method.avi':
>> >>  Metadata:
>> >>    encoder         : Lavf57.83.100
>> >>  Duration: 00:33:38.10, start: 0.000000, bitrate: 8133 kb/s
>> >>    Stream #0:0: Video: h264 (Constrained Baseline) (H264 / 0x34363248),
>> >> yuv420p(progressive), 1920x1080, 8057 kb/s, 30 fps, 30 tbr, 30 tbn, 60
>> tbc
>> >>    Stream #0:1: Audio: mp3 (U[0][0][0] / 0x0055), 32000 Hz, mono, fltp,
>> >> 64 kb/s
>> >> Stream mapping:
>> >>  Stream #0:0 -> #0:0 (h264 (native) -> h264 (h264_vaapi))
>> >>  Stream #0:1 -> #0:1 (mp3 (mp3float) -> mp3 (libmp3lame))
>> >> Press [q] to stop, [?] for help
>> >> [h264_vaapi @ 0x55fcc47055c0] B frames are not supported (0x1) by the
>> >> underlying driver.
>> >> [h264_vaapi @ 0x55fcc47055c0] Warning: some packed headers are not
>> >> supported (want 0xd, got 0).
>> >> Output #0, avi, to 'output.avi':
>> >>  Metadata:
>> >>    ISFT            : Lavf58.12.100
>> >>    Stream #0:0: Video: h264 (h264_vaapi) (Main) (H264 / 0x34363248),
>> >> vaapi_vld, 1920x1080, q=0-31, 30 fps, 30 tbn, 30 tbc
>> >>    Metadata:
>> >>      encoder         : Lavc58.18.100 h264_vaapi
>> >>    Stream #0:1: Audio: mp3 (libmp3lame) (U[0][0][0] / 0x0055), 32000
>> Hz,
>> >> mono, fltp
>> >>    Metadata:
>> >>      encoder         : Lavc58.18.100 libmp3lame
>> >> frame=  202 fps= 52 q=-0.0 Lsize=    4309kB time=00:00:06.80
>> >> bitrate=5187.5kbits/s speed=1.74x
>> >> video:4249kB audio:40kB subtitle:0kB other streams:0kB global
>> headers:0kB
>> >> muxing overhead: 0.444606%
>> >> _______________________________________________
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>> >>
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