Diagnose video studdering on low movement scenes

[clone1018]

Currently when streaming a movie, the scene will play very nicely since there's constant movement. However when switching to a more static scene we see h264 decoding errors popup in our janus-ftl-plugin edge, and the video no longer appears stable.

More details:

rtmp-ingest/rtmp.go

Lines 271 to 289 in 98e8d35

	// So the video is jittering, especially on screens with no movement.
	// To reproduce, play clock scene, see it working, and then switch to desktop scene
	// You can see in the chrome inspector that the keyframes decoded drops. You can also see the weird video problems
	// happen on the clock scene, which show up in the keyframe decoded drops.
	// I want to log the keyframes tomorrow to see if we stop getting them on the ingest side.
	// Also there's some bullshit in Janus to look at
	// Pion WebRTC also provides a SampleBuilder. This consumes RTP packets and returns samples. It can be used to
	// re-order and delay for lossy streams. You can see its usage in this example in daf27b.
	// https://github.com/pion/webrtc/issues/1652
	// https://github.com/pion/rtsp-bench/blob/master/server/main.go
	// https://github.com/pion/obs-wormhole/blob/master/internal/rtmp/rtmp.go
	//start := time.Now()
	for _, p := range packets {
	if err := h.stream.WriteRTP(p); err != nil {
	return err
	}
	}