<div dir="auto"><div><br><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">Le lun. 5 août 2019 02 h 55, Yan Wang <<a href="mailto:yan.wang@linux.intel.com">yan.wang@linux.intel.com</a>> a écrit :<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<div class="m_-814843898766805259moz-cite-prefix">On 8/3/2019 9:25 PM, Nicolas Dufresne-5
[via GStreamer-devel] wrote:<br>
</div>
<blockquote type="cite">
Le vendredi 02 août 2019 à 20:45 -0500, kmliu a écrit :
<div class="m_-814843898766805259shrinkable-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?
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<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></div></blockquote></div></div><div dir="auto">Sounds wrong to me, and I doubt you'll find an API to support that. If there is one element in VAAPI that may have an API for this it would be vaapipostproc.</div><div dir="auto"><br></div><div dir="auto"><br></div><div dir="auto"><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div text="#000000" bgcolor="#FFFFFF">
<p>Thanks.</p>
<p>Yan Wang<br>
</p>
<p><br>
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> <br>
> <br>
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