视频播放期间在特定时间戳触发事件

多亏了 ( https://github.com/willprice/python-omxplayer-wrapper )

from omxplayer import OMXPlayer
from time import sleep

/* Setup the player as shown in omxplayer-wrapper examples : */
source = '../video/gray10sec.mp4'
player = OMXPlayer(source, args=['--loop', '--no-osd', '--blank'])
player.pause()
sleep(5)
player.play()

/* Make a query to position() inside infinite loop : */
while (1):
    position = player.position() * 1000
    /* Event timecodes values are stored in "events" */
    for event in events.values():
        if position - 20 <= event['tc'] and position + 20 >= event['tc']:
            /* Put your code here */

player.quit()

您需要为此编写一些代码。您可以编写gpiowriter元素。该元素将具有io引脚的gobject属性和值的可控制属性。然后,您可以附加一个列出时间戳:值对的GstControlSource。gpiowriter可以没有pad,只运行一个线程并根据管道时钟从控制器同步属性,也可以是类似passthrough元素的标识。后者将同步帧上的属性。