[gst-devel] v4l2src not working when pipeline is placed in a bin, but it works for videotestsrc

[Edgard Lima]

Hi,

I've tested with my webcam and everything works fine....

please send me a the log of

export GST_DEBUG=v4l2*:4

./a.out > log4 2>&1

then another log with debug "v4l2*:5"

BR,
Edgard

ext Jaap Haitsma wrote:
> Hi,
> 
> I'm having trouble getting a v4l2src (a webcam) to work when it's part
> of a bin and subsequently placed in a pipeline the attached code is a
> minimal example, where it occurs. (put Makefile and gst-bin-test.c in
> a directory and run make)
> 
> If you compile the example like this it doesn't work for me.
> 
> On line 6 and 7 there are two defines
> 
> #define PUT_IN_BIN
> #define V4L2SRC
> 
> If I  comment the PUT_IN_BIN my webcam works correctly, because the
> elements are not put in a bin
> 
> If I comment the V4L2SRC the program correctly displays the test
> source no matter if everything is in a bin or in a pipeline (so it
> does not matter if you comment out PUT_IN_BIN)
> 
> Any ideas what I'm doing wrong here? Or is this a bug?
> 
> Thanks
> 
> Jaap
> 
> 
> ------------------------------------------------------------------------
> 
> #include <gtk/gtk.h>
> #include <gst/gst.h>
> #include <gst/gst.h>
> #include <gst/base/gstbasesrc.h>
> 
> 
> #define PUT_IN_BIN
> #define V4L2SRC
> 
> int main(int argc, char **argv)
> {
>   GstElement *pipeline; 
>   GstElement *bin;
>   gboolean ok;
> 
>   GstElement *video_source;
> 
>   GstElement *csp;
>   GstElement *video_sink;
> 
>   gtk_init(&argc, &argv);
>   gst_init (&argc, &argv);
> 
> 
>   pipeline = gst_pipeline_new ("pipeline");
>   bin = gst_bin_new ("bin");
> 
> #ifdef V4L2SRC
>   video_source = gst_element_factory_make ("v4l2src", "video_src");
> #else
>   video_source = gst_element_factory_make ("videotestsrc", "video_source");
> #endif
> 
>   csp = gst_element_factory_make ("ffmpegcolorspace", "csp");
>   video_sink = gst_element_factory_make ("ximagesink", "video_sink");
> 
> #ifdef PUT_IN_BIN
>   gst_bin_add_many (GST_BIN (bin), video_source, csp, video_sink, NULL);
>   gst_bin_add_many (GST_BIN (pipeline), bin, NULL);
> #else 
>   gst_bin_add_many (GST_BIN (pipeline), video_source, csp, video_sink, NULL);
> #endif
>   ok = gst_element_link_many (video_source, csp, video_sink, NULL);
>   
>   gst_element_set_state (pipeline, GST_STATE_PLAYING);
> 
>   gtk_main();
>   return 0;
> }
> 
> 
> ------------------------------------------------------------------------
> 
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