<html><head></head><body><div>On Tue, 2016-06-21 at 16:17 +0200, Peter Maersk-Moller wrote:</div><div><br></div><div>Hi,</div><div><br></div><blockquote type="cite"><div dir="ltr"><div><div><div><div><div><div><div>Noticing that conversion from I420 to BGRA and RGBA still uses different amount of CPU with conversion to BGRA being the fastest (lowest CPU load).</div><br></div>Looking into gst-plugins-base-1.8.1/gst-libs/gst/video/video-converter.c I have identified the Orc enabled function video_orc_convert_I420_BGRA() used for converting to BGRA, but I can't seem to find the similar function for RGBA. What function is used for conversion to RGBA?<br><br></div>Is there a quality difference in color quality between converting I420 to BGRA respectively RGBA ? I seem to remember mentioned the "fast path conversion" for I420 to some variant of RGB/BGR. Is fast path conversion the video_orc_convert_I420_BGRA() ?<br><br></div>In case there is a color quality difference between fast path conversion and non fast path conversion (slow/normal path conversion?), is it the possibly to quantify this difference either specifically or loosly (like a little degradation, a lot, about 10% or these color ranges gets wrong etc) ?<br><br></div>Looking into the Orc code for video_orc_convert_I420_BGRA(), I see this can be modified to convert to RGBA with just copying the video_orc_convert_I420_BGRA() function and then make it save in another order for the color components. Wouldn't that be a low hanging fruit for GStreamer since the conversion, as it is now, can be done in almost half the time for BGRA compared to RGBA .... or is there a quality aspect I don't now about, making the current conversion to RGBA preferred?<br><br></div></div></div><pre> </pre></blockquote><div><br></div><div>It's just low-hanging fruit. Note that some additional fastpaths have been added in git master already.</div><div><br></div><div>Cheers</div><div> -Tim</div><div><br></div><div><span><pre><pre>-- </pre>Tim Müller, Centricular Ltd - http://www.centricular.com </pre></span></div></body></html>