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April 20, 2020 15:15
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import traceback | |
import sys | |
import gi | |
gi.require_version('Gst', '1.0') | |
from gi.repository import Gst, GObject # noqa:F401,F402 | |
# Initializes Gstreamer, it's variables, paths | |
Gst.init(sys.argv) | |
def on_message(bus: Gst.Bus, message: Gst.Message, loop: GObject.MainLoop): | |
mtype = message.type | |
""" | |
Gstreamer Message Types and how to parse | |
https://lazka.github.io/pgi-docs/Gst-1.0/flags.html#Gst.MessageType | |
""" | |
if mtype == Gst.MessageType.EOS: | |
print("End of stream") | |
loop.quit() | |
elif mtype == Gst.MessageType.ERROR: | |
err, debug = message.parse_error() | |
print(err, debug) | |
loop.quit() | |
elif mtype == Gst.MessageType.WARNING: | |
err, debug = message.parse_warning() | |
print(err, debug) | |
return True | |
# Gst.Pipeline https://lazka.github.io/pgi-docs/Gst-1.0/classes/Pipeline.html | |
pipeline = Gst.Pipeline() | |
# Creates element by name | |
# https://lazka.github.io/pgi-docs/Gst-1.0/classes/ElementFactory.html#Gst.ElementFactory.make | |
src_name = "my_video_test_src" | |
src = Gst.ElementFactory.make("videotestsrc", "my_video_test_src") | |
src.set_property("do-timestamp", "true") | |
src.set_property("pattern", "ball") | |
sink = Gst.ElementFactory.make("gtksink") | |
encode = Gst.ElementFactory.make("x264enc") | |
encode.set_property("key-int-max", 12) | |
encode.set_property("byte-stream", "true") | |
mux = Gst.ElementFactory.make("mpegtsmux") | |
serve = Gst.ElementFactory.make("tcpserversink") | |
serve.set_property("port", 8888) | |
serve.set_property("host", "localhost") | |
pipeline.add(src) | |
#pipeline.add(sink) | |
pipeline.add(encode) | |
pipeline.add(mux) | |
pipeline.add(serve) | |
src.link(encode) | |
encode.link(mux) | |
mux.link(serve) | |
# https://lazka.github.io/pgi-docs/Gst-1.0/classes/Bus.html | |
bus = pipeline.get_bus() | |
# allow bus to emit messages to main thread | |
bus.add_signal_watch() | |
# Start pipeline | |
pipeline.set_state(Gst.State.PLAYING) | |
# Init GObject loop to handle Gstreamer Bus Events | |
loop = GObject.MainLoop() | |
# Add handler to specific signal | |
# https://lazka.github.io/pgi-docs/GObject-2.0/classes/Object.html#GObject.Object.connect | |
bus.connect("message", on_message, loop) | |
try: | |
loop.run() | |
except Exception: | |
traceback.print_exc() | |
loop.quit() | |
# Stop Pipeline | |
pipeline.set_state(Gst.State.NULL) | |
del pipeline |
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