<html><head></head><body><div style="color:#000; background-color:#fff; font-family:lucida console, sans-serif;font-size:13px"><div id="yui_3_16_0_1_1446487241381_15616">Hi,</div><div id="yui_3_16_0_1_1446487241381_15617"><br></div><div id="yui_3_16_0_1_1446487241381_15618" dir="ltr">I have a pipeline where I am trying to composite to branches:</div><div id="yui_3_16_0_1_1446487241381_15619" dir="ltr">- ksvideosrc that produces I420 frames (with no alpha channel)</div><div id="yui_3_16_0_1_1446487241381_15620" dir="ltr">- textrender that produces RGBA frames</div><div id="yui_3_16_0_1_1446487241381_15631" dir="ltr"><br></div><div id="yui_3_16_0_1_1446487241381_15644" dir="ltr">If the textrender branch is the first to produce a frame that reaches the compositor then the pipeline works fine.</div><div id="yui_3_16_0_1_1446487241381_15655" dir="ltr">On the other hand, if the ksvideosrc is first then the pipeline fails with a caps negotation failure happening in the textrender branch.</div><div id="yui_3_16_0_1_1446487241381_15687" dir="ltr"><br></div><div id="yui_3_16_0_1_1446487241381_15688" dir="ltr">I can fix the pipeline by adding a videoconvert element in the ksvideosrc branch and forcing conversion to RGBA but it does not feel right.</div><div id="yui_3_16_0_1_1446487241381_15720" dir="ltr"><br></div><div dir="ltr">Is this a bug in compositor ?<br></div><div dir="ltr"><br></div><div dir="ltr">Philippe.<br></div><div id="yui_3_16_0_1_1446487241381_15633"><br></div></div></body></html>