examples(gstreamer): add new GStreamer examples

examples/foundational/18a-gstreamer-videotestsrc.py

@@ -0,0 +1,66 @@
+#
+# Copyright (c) 2024, Daily
+#
+# SPDX-License-Identifier: BSD 2-Clause License
+#
+
+import asyncio
+import aiohttp
+import argparse
+import sys
+
+from pipecat.pipeline.pipeline import Pipeline
+from pipecat.pipeline.runner import PipelineRunner
+from pipecat.pipeline.task import PipelineTask
+from pipecat.processors.gstreamer.pipeline_source import GStreamerPipelineSource
+from pipecat.transports.services.daily import DailyParams, DailyTransport
+
+from runner import configure
+
+from loguru import logger
+
+from dotenv import load_dotenv
+load_dotenv(override=True)
+
+logger.remove(0)
+logger.add(sys.stderr, level="DEBUG")
+
+
+async def main():
+    async with aiohttp.ClientSession() as session:
+        (room_url, _) = await configure(session)
+
+        transport = DailyTransport(
+            room_url,
+            None,
+            "GStreamer",
+            DailyParams(
+                camera_out_enabled=True,
+                camera_out_width=1280,
+                camera_out_height=720,
+                camera_out_is_live=True,
+            )
+        )
+
+        gst = GStreamerPipelineSource(
+            pipeline="videotestsrc ! capsfilter caps=\"video/x-raw,width=1280,height=720\"",
+            out_params=GStreamerPipelineSource.OutputParams(
+                video_width=1280,
+                video_height=720,
+            )
+        )
+
+        pipeline = Pipeline([
+            gst,                 # GStreamer file source
+            transport.output(),  # Transport bot output
+        ])
+
+        task = PipelineTask(pipeline)
+
+        runner = PipelineRunner()
+
+        await runner.run(task)
+
+
+if __name__ == "__main__":
+    asyncio.run(main())