title: gst-launch-1.0 records mp4 and can be played in chrome
body: <p>My device is firefly rk3399, I am using usb camera for video recording, but the recorded mp4 file cannot be played under chrome
  This is my device info
  <a href="https://i.stack.imgur.com/0QiOG.png" rel="nofollow noreferrer">enter image description here</a></p>
  <p>Here is the recorded code I used
  <code>gst-launch-1.0 v4l2src device=/dev/video10 ! videoconvert ! video/x-raw,format=YUY2,width=1920,height=1080 ! queue ! mpph264enc ! queue ! h264parse ! mpegtsmux ! filesink location=/home/firefly/test2.mp4</code></p>
  <p>thanks a lot for your answer</p>