| ffmpeg -r 30 -f image2pipe -vcodec ppm -i pipe: -vcodec mpeg4 -y output.mp4
+Triming a trace
+---------------
+
+You can make a smaller trace by doing:
+
+ apitrace trim --callset 100-1000 -o trimed.trace applicated.trace
+
+If you need precise control over which calls to trim you can specify the
+individual call numbers a plaintext file, as described in the 'Call sets'
+section above.
+
+
Advanced usage for OpenGL implementors
======================================
---
* Add retrace Replay all the calls in a trace
-* Add trim Trim a trace by including only the specified calls/frames
* Add dump-state Output the OpenGL state in JSON format
* Add dump-images Create image files for each frame/drawing operation of a trace