$ adb shell screenrecord –help Usage: screenrecord [options] Records the device’s display to a .mp4 file. Options: –size WIDTHxHEIGHT 设置屏幕宽高，一般根据自己手机设置，最大支持1920×480。 Set the video size, e.g. “1280×720”. Default is the device’s main display resolution (if supported), 1280×720 if not. For best results, use a size supported by the AVC encoder. –bit-rate RATE 设置bit率 Set the video bit rate, in megabits per second. Default 4Mbps. –time-limit TIME 设置录制时间，默认最大时长180秒 Set the maximum recording time, in seconds. Default / maximum is 180. –rotate 旋转输出 Rotate the output 90 degrees. –verbose Display interesting information on stdout. –help Show this message. Recording continues until Ctrl-C is hit or the time limit is reached.