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Bug#910486: marked as done (ffmpeg: vaapi encoding does not work)

Your message dated Wed, 10 Jul 2019 22:32:19 +0200
with message-id <20190710203219.GA15915@ramacher.at>
and subject line Re: vaapi encoding does not work
has caused the Debian Bug report #910486,
regarding ffmpeg: vaapi encoding does not work
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

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-- 
910486: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=910486
Debian Bug Tracking System
Contact owner@bugs.debian.org with problems
--- Begin Message --- 
Package: ffmpeg
Version: 7:4.0.2-2+b1
Severity: normal

Dear Maintainer,

   * What led up to the situation?
   I am just following the FFmpeg wiki https://trac.ffmpeg.org/wiki/Hardware/VAAPI, and things are not working as documented.

   * What exactly did you do
   I first tried the simplest one which should "allows the decoder to work standlone to make decoding faster without any additional options", then I tried to feed the vaapi pixfmt to a vaapi encoder, but both are not working (see below)

   * What was the outcome of this action?
   For the first one:
    $ ffmpeg -hwaccel vaapi -i cut.mp4 -c:v libx264 output.mp4 -y
    Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'cut.mp4':
    Metadata:
        major_brand     : isom
        minor_version   : 512
        compatible_brands: isomiso2avc1mp41
        encoder         : Lavf57.56.101
    Duration: 00:00:19.99, start: 0.008005, bitrate: 451 kb/s
        Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt470bg/unknown/unknown), 640x480 [SAR 1:1 DAR 4:3], 361 kb/s, 29.97 fps, 29.97 tbr, 90k tbn, 2k tbc (default)
        Metadata:
        handler_name    : VideoHandler
        Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 111 kb/s (default)
        Metadata:
        handler_name    : SoundHandler
    Stream mapping:
    Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
    Stream #0:1 -> #0:1 (aac (native) -> aac (native))
    Press [q] to stop, [?] for help
    [AVHWFramesContext @ 0x7fc91004d2c0] Failed to read image from surface 0x4000018: 20 (the requested function is not implemented).
    [h264 @ 0x55b57872fd00] Failed to transfer data to output frame: -5.
    Error while processing the decoded data for stream #0:0
    [aac @ 0x55b57872e4c0] Qavg: 1227.311
    [aac @ 0x55b57872e4c0] 2 frames left in the queue on closing
    Conversion failed!

   For the second one:
    $ ffmpeg -hwaccel vaapi -hwaccel_output_format vaapi -i cut.mp4 -c:v h264_vaapi output.mp4
   ...
    Stream mapping:
    Stream #0:0 -> #0:0 (h264 (native) -> h264 (h264_vaapi))
    Stream #0:1 -> #0:1 (aac (native) -> aac (native))
    Press [q] to stop, [?] for help
    ffmpeg: i965_encoder.c:1692: intel_enc_hw_context_init: Assertion `encoder_context->mfc_context' failed.

   * What outcome did you expect instead?
   They should work...

FWIW:

The input is a short video cut in h264. Hardware decoding looks fine:
    $ ffmpeg -hwaccel vaapi -hwaccel_output_format vaapi -i cut.mp4 -f null -  
    ...
    Stream mapping:
    Stream #0:0 -> #0:0 (h264 (native) -> wrapped_avframe (native))
    Stream #0:1 -> #0:1 (aac (native) -> pcm_s16le (native))
    Press [q] to stop, [?] for help
    Output #0, null, to 'pipe:':
    Metadata:
        major_brand     : isom
        minor_version   : 512
        compatible_brands: isomiso2avc1mp41
        encoder         : Lavf58.12.100
        Stream #0:0(und): Video: wrapped_avframe, vaapi_vld, 640x480 [SAR 1:1 DAR 4:3], q=2-31, 200 kb/s, 29.97 fps, 29.97 tbn, 29.97 tbc (default)
        Metadata:
        handler_name    : VideoHandler
        encoder         : Lavc58.18.100 wrapped_avframe
        Stream #0:1(und): Audio: pcm_s16le, 44100 Hz, stereo, s16, 1411 kb/s (default)
        Metadata:
        handler_name    : SoundHandler
        encoder         : Lavc58.18.100 pcm_s16le
    frame=  542 fps=0.0 q=-0.0 Lsize=N/A time=00:00:20.08 bitrate=N/A speed= 194x    
    video:284kB audio:3444kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown

$ lspci | grep Graphic
00:02.0 VGA compatible controller: Intel Corporation HD Graphics 5500 (rev 09)

$ vainfo
libva info: VA-API version 1.2.0
libva info: va_getDriverName() returns 0
libva info: Trying to open /usr/lib/x86_64-linux-gnu/dri/i965_drv_video.so
libva info: Found init function __vaDriverInit_1_2
libva info: va_openDriver() returns 0
vainfo: VA-API version: 1.2 (libva 2.2.0)
vainfo: Driver version: Intel i965 driver for Intel(R) Broadwell - 2.2.0
vainfo: Supported profile and entrypoints
      VAProfileMPEG2Simple            : VAEntrypointVLD
      VAProfileMPEG2Simple            : VAEntrypointEncSlice
      VAProfileMPEG2Main              : VAEntrypointVLD
      VAProfileMPEG2Main              : VAEntrypointEncSlice
      VAProfileH264ConstrainedBaseline: VAEntrypointVLD
      VAProfileH264ConstrainedBaseline: VAEntrypointEncSlice
      VAProfileH264Main               : VAEntrypointVLD
      VAProfileH264Main               : VAEntrypointEncSlice
      VAProfileH264High               : VAEntrypointVLD
      VAProfileH264High               : VAEntrypointEncSlice
      VAProfileH264MultiviewHigh      : VAEntrypointVLD
      VAProfileH264StereoHigh         : VAEntrypointVLD
      VAProfileVC1Simple              : VAEntrypointVLD
      VAProfileVC1Main                : VAEntrypointVLD
      VAProfileVC1Advanced            : VAEntrypointVLD
      VAProfileJPEGBaseline           : VAEntrypointVLD
      VAProfileVP8Version0_3          : VAEntrypointVLD

$ apt list i965-va-driver 
i965-va-driver/testing,now 2.2.0+dfsg1-2 amd64 [Installed, auto]



-- System Information:
Debian Release: buster/sid
  APT prefers testing-debug
  APT policy: (500, 'testing-debug'), (500, 'testing')
Architecture: amd64 (x86_64)

Kernel: Linux 4.18.0-1-amd64 (SMP w/4 CPU cores)
Locale: LANG=zh_CN.UTF-8, LC_CTYPE=zh_CN.UTF-8 (charmap=UTF-8), LANGUAGE=zh_CN:zh (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages ffmpeg depends on:
ii  libavcodec58    7:4.0.2-2+b1
ii  libavdevice58   7:4.0.2-2+b1
ii  libavfilter7    7:4.0.2-2+b1
ii  libavformat58   7:4.0.2-2+b1
ii  libavresample4  7:4.0.2-2+b1
ii  libavutil56     7:4.0.2-2+b1
ii  libc6           2.27-6
ii  libpostproc55   7:4.0.2-2+b1
ii  libsdl2-2.0-0   2.0.8+dfsg1-4
ii  libswresample3  7:4.0.2-2+b1
ii  libswscale5     7:4.0.2-2+b1

ffmpeg recommends no packages.

Versions of packages ffmpeg suggests:
pn  ffmpeg-doc  <none>

-- no debconf information

--- End Message ---
--- Begin Message --- 
On 2018-10-07 08:23:57, ghost wrote:
> > Does evertyhing work as expected if you replace i965-va-driver with
> > i965-va-driver-shaders (from non-free)?
> Yes, I can confirm that it works with the non-free driver.

Thanks for checking. I guess it's one of the cases where encoding does
not work because of the non-free shaders we had to remove for the
version in main.

Cheers
-- 
Sebastian Ramacher

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