mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-07-07 15:15:53 +00:00
69 lines
1.8 KiB
Python
Executable file
69 lines
1.8 KiB
Python
Executable file
#!/usr/bin/python3
|
|
|
|
import sys
|
|
import gi
|
|
gi.require_version('Gst', '1.0')
|
|
from gi.repository import GObject, Gst
|
|
|
|
def bus_call(bus, msg, *args):
|
|
# print("BUSCALL", msg, msg.type, *args)
|
|
if msg.type == Gst.MessageType.EOS:
|
|
print("End-of-stream")
|
|
loop.quit()
|
|
return
|
|
elif msg.type == Gst.MessageType.ERROR:
|
|
print("GST ERROR", msg.parse_error())
|
|
loop.quit()
|
|
return
|
|
return True
|
|
|
|
saturation = -100
|
|
def set_saturation(pipeline):
|
|
global saturation
|
|
if saturation <= 100:
|
|
print("Setting saturation to {0}".format(saturation))
|
|
videosrc.set_property("saturation", saturation)
|
|
videosrc.set_property("annotation-text", "Saturation %d" % (saturation))
|
|
else:
|
|
pipeline.send_event (Gst.Event.new_eos())
|
|
return False
|
|
saturation += 10
|
|
return True
|
|
|
|
|
|
if __name__ == "__main__":
|
|
GObject.threads_init()
|
|
# initialization
|
|
loop = GObject.MainLoop()
|
|
Gst.init(None)
|
|
|
|
pipeline = Gst.parse_launch ("rpicamsrc name=src ! video/x-h264,width=320,height=240 ! h264parse ! mp4mux ! filesink name=s")
|
|
if pipeline == None:
|
|
print ("Failed to create pipeline")
|
|
sys.exit(0)
|
|
|
|
# watch for messages on the pipeline's bus (note that this will only
|
|
# work like this when a GLib main loop is running)
|
|
bus = pipeline.get_bus()
|
|
bus.add_watch(0, bus_call, loop)
|
|
|
|
videosrc = pipeline.get_by_name ("src")
|
|
videosrc.set_property("saturation", saturation)
|
|
videosrc.set_property("annotation-mode", 1)
|
|
|
|
sink = pipeline.get_by_name ("s")
|
|
sink.set_property ("location", "test.mp4")
|
|
|
|
# this will call set_saturation every 1s
|
|
GObject.timeout_add(1000, set_saturation, pipeline)
|
|
|
|
# run
|
|
pipeline.set_state(Gst.State.PLAYING)
|
|
try:
|
|
loop.run()
|
|
except Exception as e:
|
|
print(e)
|
|
# cleanup
|
|
pipeline.set_state(Gst.State.NULL)
|
|
|