<html> <head> <meta http-equiv="content-type" content="text/html; charset=ISO-8859-1"> </head> <body bgcolor="#FFFFFF" text="#000000"> I've been working on using an input-selector and ran into a strange problem. If I connect directly to the input-selector, everything is fine: <blockquote type="cite"><tt>$ gst-git gst-launch-1.0 videotestsrc ! input-selector ! autovideosink</tt><tt> </tt><tt>Setting pipeline to PAUSED ...</tt><tt> </tt><tt>Pipeline is PREROLLING ...</tt><tt> </tt><tt>Pipeline is PREROLLED ...</tt><tt> </tt><tt>Setting pipeline to PLAYING ...</tt><tt> </tt><tt>New clock: GstSystemClock</tt><tt> </tt><tt>ERROR: from element /GstPipeline:pipeline0/GstAutoVideoSink:autovideosink0/GstXImageSink:autovideosink0-actual-sink-ximage: Output window was closed</tt><tt> </tt><tt>Additional debug info:</tt><tt> </tt><tt>ximagesink.c(686): gst_ximagesink_handle_xevents (): /GstPipeline:pipeline0/GstAutoVideoSink:autovideosink0/GstXImageSink:autovideosink0-actual-sink-ximage</tt><tt> </tt><tt>Execution ended after 0:00:02.106750438</tt><tt> </tt><tt>Setting pipeline to PAUSED ...</tt><tt> </tt><tt>Setting pipeline to READY ...</tt><tt> </tt><tt>Setting pipeline to NULL ...</tt><tt> </tt><tt>Freeing pipeline ...</tt> </blockquote> But if I put a queue before the input-selector, it fails: <blockquote type="cite"><tt>$ gst-git gst-launch-1.0 videotestsrc ! queue ! input-selector ! autovideosink Setting pipeline to PAUSED ...</tt><tt> </tt><tt>Pipeline is PREROLLING ...</tt><tt> </tt><tt>ERROR: from element /GstPipeline:pipeline0/GstVideoTestSrc:videotestsrc0: Internal data flow error.</tt><tt> </tt><tt>Additional debug info:</tt><tt> </tt><tt>gstbasesrc.c(2814): gst_base_src_loop (): /GstPipeline:pipeline0/GstVideoTestSrc:videotestsrc0:</tt><tt> </tt><tt>streaming task paused, reason not-negotiated (-4)</tt><tt> </tt><tt>ERROR: pipeline doesn't want to preroll.</tt><tt> </tt><tt>Setting pipeline to NULL ...</tt><tt> </tt><tt>Freeing pipeline ...</tt></blockquote> It turns out I don't need the queue, but I'm confused about what's causing the problem. Is this a bug or am I doing something wrong (besides just being wasteful)? </body> </html>