用于从视频设备(例如摄像头)捕获视频流并进行编码、分段存储
gst-launch-1.0 -e v4l2src device=/dev/video0 ! videoconvert ! mpph264enc ! h264parse ! splitmuxsink location=/media/firefly/5A4F-91FE/video_%d.mp4 max-size-time=5000000000
usb摄像头预览
gst-launch-1.0 v4l2src device=/dev/video0 ! queue ! image/jpeg, width=640, height=480, framerate=30/1 ! jpegparse ! mppjpegdec ! xvimagesink sync=false