[FFmpeg-user] Using a AMD Radeon RX5xx with ffmpeg
Lukas Obermann
obermann.lukas at gmail.com
Tue Jul 24 14:01:58 EEST 2018
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-linux-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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