Mark Thompson wrote:
On 13/05/16 20:43, Armin K. wrote:
I noticed that recently a VAAPI based H264 encoder was added to ffmpeg.
I built ffmpeg from git and now I have h264_vaapi listed in ffmpeg -encoders
output.
However, when I try to use ffmpeg ... -vcodec h264_vaapi I get the following
error:
Impossible to convert between the formats supported by the filter
'Parsed_null_0' and the filter 'auto-inserted scaler 0'
The command I use is:
ffmpeg -hwaccel vaapi -i <inputfile> -vcodec h264_vaapi <outfile>.mkv
Short answer:
ffmpeg -vaapi_device /dev/dri/renderD128 -i <inputfile> -vf 'format=nv12,hwupload'
-c:v h264_vaapi <outfile>.mkv
Longer answer:
It's somewhat awkward to use because it only accepts input as VAAPI surfaces
(AV_PIX_FMT_VAAPI), with underlying format depending on the particular hardware.
"-vaapi_device" sets the hardware device to use. It takes either a DRI device
(ideally a render node, as above) or an X11 display name (only if you are actually in X).
Then we use libavfilter to get the input into the right form:
"format=nv12" forces software conversion to NV12, which is the underlying
format required by the Intel driver.
"hwupload" uploads that software image into a VAAPI surface, which can then be
fed into the encoder.
You need a bit more trickiness to do a pure hardware transcode, see
<https://wiki.libav.org/Hardware/vaapi> for additional explanation.
- Mark
AMD are working on vaapi encode for mesa, only a few patches about so
far and they got rejected - though not for functionality.
They do work with gstreamer, but trying above with ffmpeg fails as below
(render node or X) seems the surface is seen as rgb - but the h/w takes
nv12.
Maybe mesa/the driver is giving false info?
vainfo
libva info: VA-API version 0.38.1
libva info: va_getDriverName() returns 0
libva info: User requested driver 'radeonsi'
libva info: Trying to open /usr/lib/dri/radeonsi_drv_video.so
libva info: Found init function __vaDriverInit_0_38
libva info: va_openDriver() returns 0
vainfo: VA-API version: 0.38 (libva 1.6.3.pre1)
vainfo: Driver version: mesa gallium vaapi
vainfo: Supported profile and entrypoints
VAProfileMPEG2Simple : VAEntrypointVLD
VAProfileMPEG2Main : VAEntrypointVLD
VAProfileVC1Simple : VAEntrypointVLD
VAProfileVC1Main : VAEntrypointVLD
VAProfileVC1Advanced : VAEntrypointVLD
VAProfileH264Baseline : VAEntrypointVLD
VAProfileH264Baseline : VAEntrypointEncSlice
VAProfileH264Baseline : VAEntrypointEncPicture
VAProfileH264Main : VAEntrypointVLD
VAProfileH264High : VAEntrypointVLD
VAProfileNone : VAEntrypointVideoProc
ffmpeg doesn't seem to care about VAProfileH264Baseline
I tried avconv and it does care = bail, but I can use -profile 66 and
then get the same error as ffmpeg (though it converts to rgba rather
than rgb0)
ffmpeg -loglevel debug -vaapi_device /dev/dri/renderD128 -i
~/Pendulum-prog.mpg -vf 'format=nv12,hwupload' -c:v h264_vaapi out.mkv
ffmpeg version N-80356-g7f1b503 Copyright (c) 2000-2016 the FFmpeg
developers
built with gcc 5.3.0 (GCC)
configuration: --prefix=/usr --disable-doc --enable-gpl --enable-omx
--enable-opencl --enable-libzimg --enable-libvpx --enable-libx265
--enable-libmp3lame --enable-libx264 --enable-gnutls
libavutil 55. 24.100 / 55. 24.100
libavcodec 57. 46.100 / 57. 46.100
libavformat 57. 38.100 / 57. 38.100
libavdevice 57. 0.101 / 57. 0.101
libavfilter 6. 46.101 / 6. 46.101
libswscale 4. 1.100 / 4. 1.100
libswresample 2. 1.100 / 2. 1.100
libpostproc 54. 0.100 / 54. 0.100
Splitting the commandline.
Reading option '-loglevel' ... matched as option 'loglevel' (set logging
level) with argument 'debug'.
Reading option '-vaapi_device' ... matched as option 'vaapi_device' (set
VAAPI hardware device (DRM path or X11 display name)) with argument
'/dev/dri/renderD128'.
Reading option '-i' ... matched as input file with argument
'/home/andy/Pendulum-prog.mpg'.
Reading option '-vf' ... matched as option 'vf' (set video filters) with
argument 'format=nv12,hwupload'.
Reading option '-c:v' ... matched as option 'c' (codec name) with
argument 'h264_vaapi'.
Reading option 'out.mkv' ... matched as output file.
Finished splitting the commandline.
Parsing a group of options: global .
Applying option loglevel (set logging level) with argument debug.
Applying option vaapi_device (set VAAPI hardware device (DRM path or X11
display name)) with argument /dev/dri/renderD128.
[vaapi @ 0x190e300] Cannot open X11 display /dev/dri/renderD128.
[vaapi @ 0x190e300] Opened VA display via DRM device /dev/dri/renderD128.
libva info: VA-API version 0.38.1
libva info: va_getDriverName() returns -1
libva info: User requested driver 'radeonsi'
libva info: Trying to open /usr/lib/dri/radeonsi_drv_video.so
libva info: Found init function __vaDriverInit_0_38
libva info: va_openDriver() returns 0
[vaapi @ 0x190e300] Initialised VAAPI connection: version 0.38
[AVHWDeviceContext @ 0x3ca4c40] Format 0x3231564e -> unknown.
[AVHWDeviceContext @ 0x3ca4c40] Format 0x32315659 -> unknown.
[AVHWDeviceContext @ 0x3ca4c40] Format 0x56595559 -> unknown.
[AVHWDeviceContext @ 0x3ca4c40] Format 0x59565955 -> unknown.
[AVHWDeviceContext @ 0x3ca4c40] Format 0x41524742 -> bgra.
[AVHWDeviceContext @ 0x3ca4c40] Format 0x41424752 -> rgba.
[AVHWDeviceContext @ 0x3ca4c40] Format 0x58524742 -> bgr0.
[AVHWDeviceContext @ 0x3ca4c40] Format 0x58424752 -> rgb0.
Successfully parsed a group of options.
Parsing a group of options: input file /home/andy/Pendulum-prog.mpg.
Successfully parsed a group of options.
Opening an input file: /home/andy/Pendulum-prog.mpg.
[file @ 0x3bfb680] Setting default whitelist 'file,crypto'
[mpeg @ 0x3bfb060] Format mpeg probed with size=2048 and score=26
[mpeg @ 0x3bfb060] Before avformat_find_stream_info() pos: 0 bytes
read:32768 seeks:0 nb_streams:0
[mpeg @ 0x3bfb060] probing stream 0 pp:2500
[mpeg @ 0x3bfb060] Probe with size=2005, packets=1 detected mpegvideo
with score=25
[mpeg @ 0x3bfb060] probed stream 0
[mpeg @ 0x3bfb060] max_analyze_duration 7000000 reached at 7000000
microseconds st:0
[mpeg @ 0x3bfb060] After avformat_find_stream_info() pos: 0 bytes
read:2019472 seeks:2 frames:177
Input #0, mpeg, from '/home/andy/Pendulum-prog.mpg':
Duration: 00:00:39.84, start: 0.500000, bitrate: 1969 kb/s
Stream #0:0[0x1e0], 177, 1/90000: Video: mpeg2video (Main), 1
reference frame, yuv420p(tv, left), 720x576 [SAR 1:1 DAR 5:4], 0/1, 25
fps, 25 tbr, 90k tbn, 50 tbc
Successfully opened the file.
Parsing a group of options: output file out.mkv.
Applying option vf (set video filters) with argument format=nv12,hwupload.
Applying option c:v (codec name) with argument h264_vaapi.
Successfully parsed a group of options.
Opening an output file: out.mkv.
File 'out.mkv' already exists. Overwrite ? [y/N] y
[file @ 0x3ce8680] Setting default whitelist 'file,crypto'
Successfully opened the file.
detected 4 logical cores
[Parsed_format_0 @ 0x3cf4840] compat: called with args=[nv12]
[Parsed_format_0 @ 0x3cf4840] Setting 'pix_fmts' to value 'nv12'
[graph 0 input from stream 0:0 @ 0x3cd5fc0] Setting 'video_size' to
value '720x576'
[graph 0 input from stream 0:0 @ 0x3cd5fc0] Setting 'pix_fmt' to value '0'
[graph 0 input from stream 0:0 @ 0x3cd5fc0] Setting 'time_base' to value
'1/90000'
[graph 0 input from stream 0:0 @ 0x3cd5fc0] Setting 'pixel_aspect' to
value '1/1'
[graph 0 input from stream 0:0 @ 0x3cd5fc0] Setting 'sws_param' to value
'flags=2'
[graph 0 input from stream 0:0 @ 0x3cd5fc0] Setting 'frame_rate' to
value '25/1'
[graph 0 input from stream 0:0 @ 0x3cd5fc0] w:720 h:576 pixfmt:yuv420p
tb:1/90000 fr:25/1 sar:1/1 sws_param:flags=2
[format @ 0x3cf1660] compat: called with args=[vaapi_vld]
[format @ 0x3cf1660] Setting 'pix_fmts' to value 'vaapi_vld'
[auto-inserted scaler 0 @ 0x3cf2a60] Setting 'flags' to value 'bicubic'
[auto-inserted scaler 0 @ 0x3cf2a60] w:iw h:ih flags:'bicubic' interl:0
[Parsed_format_0 @ 0x3cf4840] auto-inserting filter 'auto-inserted
scaler 0' between the filter 'graph 0 input from stream 0:0' and the
filter 'Parsed_format_0'
[auto-inserted scaler 1 @ 0x3cf4ec0] Setting 'flags' to value 'bicubic'
[auto-inserted scaler 1 @ 0x3cf4ec0] w:iw h:ih flags:'bicubic' interl:0
[Parsed_hwupload_1 @ 0x3cd6100] auto-inserting filter 'auto-inserted
scaler 1' between the filter 'Parsed_format_0' and the filter
'Parsed_hwupload_1'
[AVFilterGraph @ 0x3cf9ce0] query_formats: 5 queried, 2 merged, 2
already done, 0 delayed
[auto-inserted scaler 1 @ 0x3cf4ec0] picking rgb0 out of 4 ref:nv12 alpha:0
[auto-inserted scaler 0 @ 0x3cf2a60] w:720 h:576 fmt:yuv420p sar:1/1 ->
w:720 h:576 fmt:nv12 sar:1/1 flags:0x4
[auto-inserted scaler 1 @ 0x3cf4ec0] w:720 h:576 fmt:nv12 sar:1/1 ->
w:720 h:576 fmt:rgb0 sar:1/1 flags:0x4
[hwupload @ 0x3cd61c0] Surface format is rgb0.
[AVHWFramesContext @ 0x3cf1700] Created surface 0x1.
[AVHWFramesContext @ 0x3cf1700] Direct mapping possible.
[h264_vaapi @ 0x3ce7dc0] Using fixed QP = 20 / 20 / 24 for IDR / P / B
frames.
[h264_vaapi @ 0x3ce7dc0] Using (null) as format of reconstructed frames.
[AVHWFramesContext @ 0x3d37fa0] Unsupported format: (null).
[h264_vaapi @ 0x3ce7dc0] Failed to initialise reconstructed frame
context: -22.
Output #0, matroska, to 'out.mkv':
Stream #0:0, 0, 0/0: Unknown: none, SAR 1:1 DAR 0:0
Metadata:
encoder : Lavc57.46.100 h264_vaapi
Stream mapping:
Stream #0:0 -> #0:0 (mpeg2video (native) -> h264 (h264_vaapi))
Error while opening encoder for output stream #0:0 - maybe incorrect
parameters such as bit_rate, rate, width or height
[AVIOContext @ 0x3ce8760] Statistics: 0 seeks, 0 writeouts
[AVIOContext @ 0x3bfa540] Statistics: 2019472 bytes read, 2 seeks
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