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<div class="moz-cite-prefix">On 8/3/2019 9:25 PM, Nicolas Dufresne-5
[via GStreamer-devel] wrote:<br>
</div>
<blockquote type="cite"
cite="mid:100424c27a943d959b88997e285e06f1161454b4.camel@ndufresne.ca">
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Le vendredi 02 août 2019 à 20:45 -0500, kmliu a écrit :
<div class="shrinkable-quote"><br>
> I need to decode H.264 video via VAAPI and then extract the
decoded frames to
<br>
> main memory. Since I intend to crop the frames anyway, I'd
like to crop them
<br>
> while they're still in graphics memory, to reduce memory
bandwidth
<br>
> consumption. So conceptually, I want to do this:
<br>
> <br>
> gst-launch-1.0 rtspsrc location=rtsp_uri ! rtph264depay !
vaapih264dec !
<br>
> videocrop left=x right=x top=x bottom=x ! filesink
location=video.yuv <br>
> <br>
> But I think this will end up copying the whole frames to
main memory before
<br>
> cropping it there. It would be nice if vaapipostproc
supports cropping?
</div>
<br>
Another (simplier) option is to use gltransformation, but
apparently
<br>
not all distro ship this plugin.
<br>
</blockquote>
<p>May I add the crop option for vaapih264dec? </p>
<p>It may be more direct.</p>
<p>Thanks.</p>
<p>Yan Wang<br>
</p>
<p><br>
</p>
<blockquote type="cite"
cite="mid:100424c27a943d959b88997e285e06f1161454b4.camel@ndufresne.ca"><br>
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