python/examples/test-video.py

#!/usr/bin/env python3
#
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import sys
import argparse
from jetson_utils import videoSource, videoOutput, Log


# parse command line
parser = argparse.ArgumentParser(description="Test various video streaming APIs", 
                                 formatter_class=argparse.RawTextHelpFormatter, 
                                 epilog=videoSource.Usage() + videoOutput.Usage() + Log.Usage())

parser.add_argument("input", type=str, default="/dev/video0", nargs='?', help="URI of the input stream")
parser.add_argument("output", type=str, default="images/test/test_video.mp4", nargs='?', help="URI of the output stream")

try:
	args = parser.parse_known_args()[0]
except:
	print("")
	parser.print_help()
	sys.exit(0)
    
    
# create video source
input = videoSource(args.input, 
                    argv=sys.argv,
                    options={
                        'width': 1920,
                        'height': 1080,
                        'framerate': 30, 
                    })
           
# output
output = videoOutput(args.output,
                     argv=sys.argv,
                     options={
                        'bitrate': 2500000,
                        'codec': 'h264'
                     })
                     
# capture frames until EOS or user exits
numFrames = 0

while True:
    # capture the next image
    img = input.Capture()

    if img is None: # timeout
        continue  
        
    if numFrames % 25 == 0 or numFrames < 15:
        Log.Verbose(f"test-video:  captured {numFrames} frames ({img.width} x {img.height})")
	
    numFrames += 1
	
    # render the image
    output.Render(img)
    
    # update the title bar
    output.SetStatus("Video Test | {:d}x{:d} | {:.1f} FPS".format(img.width, img.height, output.GetFrameRate()))
	
    # exit on input/output EOS
    if not input.IsStreaming() or not output.IsStreaming():
        break