[FFmpeg-user] A query on using the OpenCL tonemap filter from derived OpenCL device contexts from VAAPI.

[Dennis Mungai]

I'll correct that and update the question, thanks.

On Tue, 6 Nov 2018 at 11:08, Paul B Mahol <onemda at gmail.com> wrote:

> On 11/6/18, Dennis Mungai <dmngaie at gmail.com> wrote:
> > Hello there,
> >
> > From this patchwork:
> >
> https://git.ffmpeg.org/gitweb/ffmpeg.git/commit/8b8b0e2cd26cf1f522c630859fcbcc62b6493fb9
> >
> > It should be possible to utilize an OpenCL tonemap filter which does
> > HDR(HDR10/HLG) to SDR conversion with tone-mapping, as shown in the
> example
> > below:
> >
> > ffmpeg -init_hw_device vaapi=va:/dev/dri/renderD128 -init_hw_device \
> > opencl=ocl at va -hwaccel vaapi -hwaccel_device va -hwaccel_output_format \
> > vaapi -i INPUT -filter_hw_device ocl -filter_complex \
> > '[0:v]hwmap,tonemap_opencl=t=bt2020:tonemap=linear:format=p010[x1]; \
> > [x1]hwmap=derive_device=vaapi:reverse=1' -c:v hevc_vaapi -profile 2
> OUTPUT
> >
> > However, doing this results in a failure, shown below:
> >
> > Device creation failed: -38.
> > Failed to set value 'opencl=ocl at va' for option 'init_hw_device':
> Function
> > not implemented
> >
> > Platform details:
> >
> > I'm using the Intel Media driver built with the
> > cl_intel_va_api_media_sharing OpenCL extension enabled. The OpenCL
> platform
> > on the system is based on Neo:
> >
> > fmpeg -hide_banner -v verbose -init_hw_device opencl
> > [AVHWDeviceContext @ 0x560d50e77140] 0.0: Intel(R) OpenCL HD Graphics /
> > Intel(R) Gen9 HD Graphics NEO
> >
> > The Intel Media SDK is also installed, and can use both  QSV and
> > VAAPI-based encoders in FFmpeg using the media-driver.
> >
> > How can I fix that issue above?
>
> Issues posted with -hide_banner option are ignored.
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