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<div>Hi,</div>
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<div>What's your input format? Maybe you can use ffmpeg cmdline to confirm it first, like:</div>
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<pre class="msg" style="--tw-shadow: 0 0 transparent; padding: 0.5em; border: 0px; font-stretch: normal; font-size: 12px; line-height: 1.2; font-family: "lucida console", monospace; vertical-align: baseline; overflow-x: auto; color: rgb(34, 34, 34); orphans: 2; widows: 2; text-decoration-thickness: initial;">ffmpeg -hwaccel vaapi -vaapi_device /dev/dri/renderD128 -v verbose -f rawvideo -pix_fmt nv12 -s:v 1280x720 -i input_NV12.yuv -vf 'hwupload,scale_vaapi=format=bgra,hwdownload,format=bgra' -f rawvideo -vsync passthrough -an -vframes 10 -y output_NV12_to_BGRA.yuv</pre>
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<div>And more vaapi use case you can reference ffmpeg-vaapi wiki:</div>
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<div><a href="https://trac.ffmpeg.org/wiki/Hardware/VAAPI">https://trac.ffmpeg.org/wiki/Hardware/VAAPI</a></div>
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<div>Thanks</div>
<div>Fei</div>
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<p class="MsoNormal"><b>From:</b> Libav-user <libav-user-bounces@ffmpeg.org> <b>On Behalf Of
</b>andr box<br>
<b>Sent:</b> Monday, February 14, 2022 6:05 AM<br>
<b>To:</b> This list is about using libavcodec, libavformat, libavutil, libavdevice and libavfilter. <libav-user@ffmpeg.org><br>
<b>Subject:</b> Re: [Libav-user] Hardware scaling with libavfilter<o:p></o:p></p>
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<p class="MsoNormal">ne 13. 2. 2022 v 22:55 odesílatel icy_flurry via Libav-user <<a href="mailto:libav-user@ffmpeg.org">libav-user@ffmpeg.org</a>> napsal:<o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif">Hi,<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif">I'm trying to scale an image in hardware using VA-API with libavfilter. I also want to change the colorspace of the image to BGRA. However, the output frame I get is just a black
image with a white line on top. How do I fix this? Let me know if more information is required.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif">Code: <a href="https://pastecord.com/eqagejavum.cpp" target="_blank">https://pastecord.com/eqagejavum.cpp</a><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif">Thanks in advance<o:p></o:p></span></p>
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