#!/usr/bin/env python3
import subprocess, sys

fps = sys.argv[1] if len(sys.argv) > 1 else "60"
size = sys.argv[2] if len(sys.argv) > 2 else "3840x2160"
port = sys.argv[3] if len(sys.argv) > 3 else "5000"
bitrate = sys.argv[4] if len(sys.argv) > 4 else "40M"

cmd = [
    "ffmpeg", "-hide_banner", "-v", "error",
    "-f", "lavfi", "-i",
    f"testsrc2=size={size}:rate={fps}:duration=1000",
    "-an",
    "-c:v", "libx265",
    "-preset", "ultrafast",
    "-tune", "zerolatency",
    "-pix_fmt", "yuv420p",
    "-b:v", bitrate,
    "-x265-params", "bframes=0:keyint=30:scenecut=0",
    "-f", "rtp",
    "-payload_type", "96",
    "-sdp_file", "/tmp/gdvapi_test4k.sdp",
    f"rtp://127.0.0.1:{port}",
]
print("running:", " ".join(cmd))
try:
    subprocess.run(cmd, check=True)
except KeyboardInterrupt:
    pass
except subprocess.CalledProcessError as e:
    print("ffmpeg exited", e.returncode)
    sys.exit(1)