[mythtv-users] Warning about keyframes in mythbackend.log -- normal?

[Craig Huff]

I record programs in SD from Comcast using DTAs feeding PVR-500
inputs.  While cleaning up log overruns, I ran across numerous entries
in mythbackend.log of the form:
       ...warning: first frame is no keyframe

Is this an indication that I need to fix something?  From my scan thru
gossamer threads, I didn't find anything that seemed relevant with
respect to SD recordings.

TIA,
Craig.