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Created Sep 17, 2014
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v4l2src hangs on Gstreamer 1.0 but works on 0.10
Hangs after two frames with gstreamer 1.0:
gcc -o v4l2_hang1.0 `pkg-config gstreamer-1.0 --cflags --libs` v4l2_hang.c && ./v4l2_hang1.0
Works fine with 0.10
gcc -o v4l2_hang0.10 `pkg-config gstreamer-0.10 --cflags --libs` v4l2_hang.c && ./v4l2_hang0.10
#include <gst/gst.h>
#include <stdio.h>
int main(int argc, char **argv) {
gst_init(&argc, &argv);
GError *error = NULL;
GstElement *pipeline = gst_parse_launch(
"v4l2src device=/dev/video0 ! "
"appsink sync=false max-buffers=1 drop=true name=sink emit-signals=true",
if(!pipeline) {
printf("Pipeline construction failed: %s\n", error->message);
return 1;
GstElement *sink = gst_bin_get_by_name((GstBin *)pipeline, "sink");
if(!sink) {
puts("Gouldn't get the sink");
return 1;
gst_element_set_state(pipeline, GST_STATE_PLAYING);
GstSample *sample;
for(;;) {
printf("Pulling sample\n");
g_signal_emit_by_name(sink, "pull-sample", &sample, NULL);
GstBuffer *buffer;
for(;;) {
printf("Pulling buffer\n");
g_signal_emit_by_name(sink, "pull-buffer", &buffer, NULL);
return 0;
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