import boto3

client = boto3.client('rekognition')

response = client.start_stream_processor(
    Name='tangelo1',
    StartSelector={
        'KVSStreamStartSelector': {
            'ProducerTimestamp': 'StartTimeStamp'
        }
    },
    StopSelector={
        'MaxDurationInSeconds': 120
    }
)

print(response)