Quoting Mark Thompson (2017-04-23 21:21:08)
> Also refactor a little and improve error messages to make failure
> cases easier to understand.
> ---
> Removed the useless device reference.
> 
> Example use:
> 
> ./avconv -y -init_hw_device vaapi -hwaccel vaapi -hwaccel_output_format vaapi 
> -i in.mp4 -an -vf 
> 'deinterlace_vaapi,scale_vaapi=1280:720,hwmap=derive_device=qsv,format=qsv' 
> -c:v h264_qsv -b 5M -maxrate 5M out.mp4
> 
> 
>  libavfilter/vf_hwmap.c | 67 
> ++++++++++++++++++++++++++++++++++++--------------
>  1 file changed, 49 insertions(+), 18 deletions(-)

Looks good

-- 
Anton Khirnov
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