mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-04 23:46:43 +00:00
65 lines
1.9 KiB
Python
65 lines
1.9 KiB
Python
|
#!/usr/bin/env python3
|
||
|
|
import sys
|
||
|
|
import gi
|
||
|
|
import logging
|
||
|
|
|
||
|
|
gi.require_version("GLib", "2.0")
|
||
|
|
gi.require_version("GObject", "2.0")
|
||
|
|
gi.require_version("Gst", "1.0")
|
||
|
|
|
||
|
|
from gi.repository import Gst, GLib, GObject
|
||
|
|
|
||
|
|
|
||
|
|
logging.basicConfig(level=logging.DEBUG, format="[%(name)s] [%(levelname)8s] - %(message)s")
|
||
|
|
logger = logging.getLogger(__name__)
|
||
|
|
|
||
|
|
# Initialize GStreamer
|
||
|
|
Gst.init(sys.argv[1:])
|
||
|
|
|
||
|
|
# Create the elements
|
||
|
|
source = Gst.ElementFactory.make("videotestsrc", "source")
|
||
|
|
sink = Gst.ElementFactory.make("autovideosink", "sink")
|
||
|
|
|
||
|
|
# Create the empty pipeline
|
||
|
|
pipeline = Gst.Pipeline.new("test-pipeline")
|
||
|
|
|
||
|
|
if not pipeline or not source or not sink:
|
||
|
|
logger.error("Not all elements could be created.")
|
||
|
|
sys.exit(1)
|
||
|
|
|
||
|
|
|
||
|
|
# Build the pipeline
|
||
|
|
pipeline.add(source, sink)
|
||
|
|
if not source.link(sink):
|
||
|
|
logger.error("Elements could not be linked.")
|
||
|
|
sys.exit(1)
|
||
|
|
|
||
|
|
# Modify the source's properties
|
||
|
|
source.props.pattern = 0
|
||
|
|
# Can alternatively be done using `source.set_property("pattern",0)`
|
||
|
|
# or using `Gst.util_set_object_arg(source, "pattern", 0)`
|
||
|
|
|
||
|
|
# Start playing
|
||
|
|
ret = pipeline.set_state(Gst.State.PLAYING)
|
||
|
|
if ret == Gst.StateChangeReturn.FAILURE:
|
||
|
|
logger.error("Unable to set the pipeline to the playing state.")
|
||
|
|
sys.exit(1)
|
||
|
|
|
||
|
|
# Wait for EOS or error
|
||
|
|
bus = pipeline.get_bus()
|
||
|
|
msg = bus.timed_pop_filtered(Gst.CLOCK_TIME_NONE, Gst.MessageType.ERROR | Gst.MessageType.EOS)
|
||
|
|
|
||
|
|
# Parse message
|
||
|
|
if msg:
|
||
|
|
if msg.type == Gst.MessageType.ERROR:
|
||
|
|
err, debug_info = msg.parse_error()
|
||
|
|
logger.error(f"Error received from element {msg.src.get_name()}: {err.message}")
|
||
|
|
logger.error(f"Debugging information: {debug_info if debug_info else 'none'}")
|
||
|
|
elif msg.type == Gst.MessageType.EOS:
|
||
|
|
logger.info("End-Of-Stream reached.")
|
||
|
|
else:
|
||
|
|
# This should not happen as we only asked for ERRORs and EOS
|
||
|
|
logger.error("Unexpected message received.")
|
||
|
|
|
||
|
|
pipeline.set_state(Gst.State.NULL)
|