软件是串口控制；软件串口com5；用虚拟com6给com5发01，放第一个视频。02放第二个...

ID:285686 · 发表于 2026-8-11 12:22

软件是串口控制；软件串口com5；用虚拟com6给com5发01，放第一个视频。02放第二个视频。03是关闭。

import serial
import subprocess

# =========配置区========
COM_PORT = "COM5"
BAUD = 9600
VIDEO_MAP = {
0x01: "video1.mp4",
0x02: "video2.mp4"
}
CMD_STOP = 0x03
CMD_PAUSE = 0x04 # 串口发04 HEX →暂停
CMD_RESUME = 0x05 # 串口发05 HEX →继续播放
FFPLAY_EXE = r".\ffplay.exe"
# =======================

ser = serial.Serial(COM_PORT, BAUD, timeout=0.02)
player_proc = None

def stop_play():
global player_proc
if player_proc:
      try:
         player_proc.terminate()
      except Exception:
         pass
      player_proc = None

def pause_video():
"""发送pause指令给ffplay实现暂停"""
global player_proc
if player_proc and player_proc.poll() is None:
      try:
         player_proc.stdin.write(b"pause\n")
         player_proc.stdin.flush()
         print("执行暂停")
      except Exception as e:
         print("暂停失败：",e)

def resume_video():
"""再次发送pause就是恢复播放，ffplay切换开关"""
global player_proc
if player_proc and player_proc.poll() is None:
      try:
         player_proc.stdin.write(b"pause\n")
         player_proc.stdin.flush()
         print("执行继续播放")
      except Exception as e:
         print("继续失败：",e)

while True:
if ser.in_waiting > 0:
      raw_byte = ser.read(1)
      cmd = ord(raw_byte)
      print(f"收到串口指令 0x{cmd:02X}")

      if cmd in VIDEO_MAP:
         stop_play()
         vid_file = VIDEO_MAP[cmd]
         # stdin=subprocess.PIPE 必须加！！才能给ffplay发暂停命令
         player_proc = subprocess.Popen([
            FFPLAY_EXE,
            "-fs",
            "-autoexit",
            "-x", "1920",
            "-y", "1080",
            vid_file
         ], stdin=subprocess.PIPE)

      elif cmd == CMD_STOP:
         stop_play()

      elif cmd == CMD_PAUSE:
         pause_video()

      elif cmd == CMD_RESUME:
         resume_video()

# 检测视频播完
if player_proc is not None:
      exit_code = player_proc.poll()
      if exit_code is not None:
         print("视频播放完毕，等待串口触发")
         player_proc = None

stop_play()
ser.close()

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