Produce video of only draw commands for specific GLES context using gapit

If I understand `gapid` correctly frame boundaries are defined as calls to `eglSwapBuffers()`. If my application is rendering to an off-screen framebuffer as well as to an EGL window surface I'd like to use `gapit` to produce a video of only the draw calls involved in rendering to both these targets. It seems like maybe adding debug markers like the `gapid` documentation suggests in conjunction with the `gapit` `-commands` option with a command line like `gapit video -context 0 -commands` might be able to get me closer to what I want but I'm not sure how to tie everything together. Is this possible?