pipelne.get_clock() returns None

[Stuart Axon]

Cheers.
In case this is useful to anyone in the future:

I wasn't sure how synchronously to wait for the pipeline to become prerolled, while using GLib.MainLoop -  but was able to grab the system clock before the pipeline was prerolled, and set it like this:

>>> clock = Gst.SystemClock.obtain()
>>> pipeline.use_clock(clock)

I verified this was the same clock that the pipeline used, by watching for the 'new-clock' message on the bus 


bus = pipeline.get_bus()

def on_message(bus, message):
    if pipeline.get_clock():
        print("on_message, type: %s" % message.type)
        clock = pipeline.get_clock()
        sysclock = Gst.SystemClock.obtain()
        print("sysclock, clock, clock == sysclock", sysclock, clock, sysclock == clock)
    
bus.add_signal_watch()
bus.connect("message::new-clock", on_message)
bus.add_watch(0, bus_call, mainloop) # 0 == GLib.PRIORITY_DEFAULT 



    On Tuesday, September 13, 2016 9:31 PM, Arjen Veenhuizen <arjen.veenhuizen at tno.nl> wrote:
 
 

 I think you have to wait until the pipeline is at least in PREROLLED state
before you can retrieve a valid clock.



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