title: Framerate problem when saving video using gstreamer
body: <p>I am writing a program that stabilizes an input video and then save it to a video file using gstreamer. The pipeline I used is:</p>
  
  <pre><code>appsrc name=mySrc ! video/xraw,width=1920,height=1072,framerate=25/1,format=I420 ! avenc_mpeg4 bitrate=800000 max-threads=4 max-bframes=10 ! video/mpeg ! mpegtsmux ! filesink location=
  </code></pre>
  
  <p>Each frame after being processed by the stabilization algorithm will be put into the saving pipeline at the rate of 10 fps (processing time is 100 ms). The problem is, although the saving framerate is set to 25 fps in the pipeline, the stored video is always played back at framerate of 10fps by default (I use VLC).</p>
  
  <p>So, is the any parameters I missed that I could not configured the framerate I wanted?</p>
  
  <p>Any help is highly appreciate  </p>