Hi,
I use following pipeline to record video(I developed program base on
gstreamer python binding.):
gst-launch v4l2src name=videosrc queue-size=2 !
image/jpeg,width=640,height=480 ! tee name=vsrc vsrc. ! queue
! jpegdec ! ffmpegcolorspace ! timeoverlay ! gconfvideosink
vsrc. ! queue ! muxer. avimux name=muxer ! filesink
location=x.avi alsasrc name=audiosrc !
'audio/x-raw-int,rate=8000,channels=1,width=8,signed=false' !
queue ! muxer.
but when I stop recording, it consume so much time(more than 30 seconds
sometimes). I used following code to stop recording:
# stop v4l2src
videosrc = self.recorder.get_by_name("videosrc")
videosrc.set_state(gst.STATE_NULL)
videosrc.set_locked_state(True)
# stop alsasrc
audiosrc = self.recorder.get_by_name("audiosrc")
audiosrc.set_state(gst.STATE_NULL)
audiosrc.set_locked_state(True)
following is the gdb backtrace:
#0 0xffffe410 in __kernel_vsyscall ()
#1 0xb7ed9589 in __lll_lock_wait () from /lib/i686/cmov/libpthread.so.0
#2 0xb7ed4ba6 in _L_lock_95 () from /lib/i686/cmov/libpthread.so.0
#3 0xb7ed458a in pthread_mutex_lock () from /lib/i686/cmov/libpthread.so.0
#4 0xb6adacb9 in gst_base_src_set_playing (basesrc=0x83d75f0, live_play=0)
at gstbasesrc.c:2453
#5 0xb6add9f8 in gst_base_src_change_state (element=0x83d75f0,
transition=GST_STATE_CHANGE_PLAYING_TO_PAUSED) at gstbasesrc.c:2652
#6 0xb6a56be7 in gst_element_change_state (element=0x83d75f0,
transition=GST_STATE_CHANGE_PLAYING_TO_PAUSED) at gstelement.c:2410
#7 0xb6a57133 in gst_element_set_state_func (element=0x83d75f0, state=GST_STATE_NULL)
at gstelement.c:2360
#8 0xb6a55c93 in gst_element_set_state (element=0x83d75f0, state=GST_STATE_NULL)
at gstelement.c:2263
why stop recording so slow?
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