capture.py

capture.py

@@ -0,0 +1,52 @@
+#!/usr/bin/env python3
+from subprocess import Popen, PIPE, STDOUT
+import json
+import argparse
+
+parser = argparse.ArgumentParser(description='Video Capture')
+parser.add_argument('--video_size', default="720x480", help='Video resolution setting for capture device')
+parser.add_argument('--scale_to', default="640x480", help='Scale video to resolution')
+parser.add_argument('--fps', default=29.97, type=float, help='Frames per second (float)')
+parser.add_argument('--device', default="Conexant Polaris Video Capture", help='Capture device name')
+parser.add_argument('--time', default="2:05:00", help='Capture time limit')
+parser.add_argument('--crf', default=24, type=int, help='CRF setting')
+parser.add_argument('--maxrate', default=2500, type=int, help='Maximum bitrate')
+parser.add_argument('--out', required=True, help='Output file')
+args = parser.parse_args()
+
+cmd = [
+  "ffmpeg",
+  "-framerate", str(args.fps), 
+  "-vsync", "1", 
+  "-video_size", "720x480",
+  "-f", "dshow",
+  "-rtbufsize", "250000k",
+  "-crossbar_video_input_pin_number", "1", 
+  "-crossbar_audio_input_pin_number", "2",
+  "-i", "video=" + args.device + ":audio=" + args.device,
+  "-t", args.time,
+  "-force_key_frames", ",".join(["00:00:%02d.000" % x for x in range(11)]),
+  "-vf", "fps=" + str(args.fps) + ",yadif=0:0:0,hqdn3d=6:4:6:4,scale=" + args.scale_to,
+  "-c:v", "libx264",
+  "-preset", "medium",
+  "-tune", "film", 
+  "-profile:v", "main", 
+  "-level", "3.1",
+  "-pix_fmt", "yuv420p",
+  "-crf", str(args.crf),
+  "-maxrate", str(args.maxrate) + "k",
+  "-bufsize", str(args.maxrate*2) + "k",
+  "-af", "aresample=async=1000,highpass=200,lowpass=3500",
+  "-c:a", "aac",
+  "-b:a", "96k",
+  "-strict", "-2",
+  "-r", str(args.fps),
+  args.out
+]
+
+print(cmd)
+p = Popen(cmd, stdout=None, stderr=None)
+#for line in p.stdout:
+#  print("FFMPEG: " + line.decode('utf-8').rstrip())
+exit = p.wait()
+print("FFMPEG exit code " + str(exit))