On 12/14/23 18:38, Phyllis Smith via Cin wrote:

On Tue, Dec 12, 2023 at 8:17 AM Andrea paz via Cin <cin@lists.cinelerra-gg.org> wrote:

I tried to create an encoding profile for av1_vaapi. I attach the preset.
It does not work and I get the following error:

[av1_vaapi @ 0x7f8c94163500] A hardware frames reference is required
to associate the encoding device.
FFMPEG::open_encoder  err: Invalid argument

A lot of "muddy waters" when searching this on the internet but the bottom line is for us in looking for what are the current ffmpeg 6.1 supported encoders, key in:

# ./thirdparty/ffmpeg-6.1/ffmpeg -encoders | grep av1
 V....D libaom-av1          libaom AV1 (codec av1)
 A....D wmav1               Windows Media Audio 1

which means the first line of av1_vaapi.webm can only be "webm libaom-av1" which will not provide vaapi; that is the line used in av1.webm.

Hm, I wonder why so few av1 encoders are enabled?

In comparison I get this list from Packman's ffmpeg 6.0.1 on Tumbleweed-Slowroll:

fmpeg -encoders -hide_banner | grep av1
 V....D libaom-av1           libaom AV1 (codec av1)
 V....D librav1e             librav1e AV1 (codec av1)
 V..... libsvtav1            SVT-AV1(Scalable Video Technology for AV1) encoder (codec av1)
 V....D av1_nvenc            NVIDIA NVENC av1 encoder (codec av1)
 V....D av1_amf              AMD AMF AV1 encoder (codec av1)
 A....D wmav1                Windows Media Audio 1

ffmpeg -hwaccels -hide_banner
Hardware acceleration methods:
vdpau
cuda
vaapi
qsv
drm
vulkan

Additional references:
https://trac.ffmpeg.org/wiki/HWAccelIntro
https://trac.ffmpeg.org/wiki/Hardware/VAAPI
https://trac.ffmpeg.org/wiki/Hardware/QuickSync
https://www.reddit.com/r/AV1/comments/14zwron/guidance_for_av1_hwaccel/

Just to ensure that the " ./thirdparty/ffmpeg-6.1/ffmpeg -encoders | grep your_request" works as expected, keyin:

# ./thirdparty/ffmpeg-6.1/ffmpeg -encoders | grep h264
 V....D libx264              libx264 H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 (codec h264)
 V....D libx264rgb           libx264 H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 RGB (codec h264)
 V....D h264_nvenc           NVIDIA NVENC H.264 encoder (codec h264)
 V..... h264_v4l2m2m         V4L2 mem2mem H.264 encoder wrapper (codec h264)
 V....D h264_vaapi           H.264/AVC (VAAPI) (codec h264)

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