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Fix v4l2 example

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This commit is contained in:
Nicolas Dufresne 2017-06-06 11:29:29 -04:00
parent 55e0b18186
commit e937a8856d
1 changed files with 10 additions and 8 deletions
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18
tests/examples/v4l2/camctrl.c
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@ -22,9 +22,6 @@
*
* TODO:
* - handle stream status and switch capture thread to SCHED_RR/FIFO
* - the queue-size controls the controler offset
* - right now we work with 1 queued picture and thus active settings for next
* frame
* - we want some feedback about how precisely a program can be realized
* - we might want to adjust the framerate to handle hardware limmits
* - we e.g. can't change resolution per frame right now
@ -118,7 +115,7 @@ gint
main (gint argc, gchar ** argv)
{
GstElement *bin;
GstElement *src, *fmt, *enc, *sink;
GstElement *src, *cvt, *fmt, *enc, *sink;
GstCaps *caps;
GstStructure *prog;
@ -149,17 +146,21 @@ main (gint argc, gchar ** argv)
("video/x-raw, width=640, height=480, framerate=(fraction)15/1");
g_object_set (fmt, "caps", caps, NULL);
if (!(cvt = gst_element_factory_make ("videoconvert", NULL))) {
GST_WARNING ("Can't create element \"videoconvert\"");
return -1;
}
if (!(src = gst_element_factory_make ("v4l2src", NULL))) {
GST_WARNING ("Can't create element \"v4l2src\"");
return -1;
}
g_object_set (src, "queue-size", 1, NULL);
/* add objects to the main bin */
gst_bin_add_many (GST_BIN (bin), src, fmt, enc, sink, NULL);
gst_bin_add_many (GST_BIN (bin), src, cvt, fmt, enc, sink, NULL);
/* link elements */
if (!gst_element_link_many (src, fmt, enc, sink, NULL)) {
if (!gst_element_link_many (src, cvt, fmt, enc, sink, NULL)) {
GST_WARNING ("Can't link elements");
return -1;
}
@ -181,7 +182,8 @@ main (gint argc, gchar ** argv)
NULL);
#endif
set_program (GST_OBJECT (src), prog);
g_object_set (src, "num-buffers", gst_structure_n_fields (prog), NULL);
g_object_set (src, "num-buffers", gst_structure_n_fields (prog),
"device", argv[1] ? argv[1] : "/dev/video0", NULL);
/* prepare playback */
gst_element_set_state (bin, GST_STATE_PAUSED);