In the past I made the mistake of shooting interlaced video. When I rendered in HF, the footage showed jagged edges. JSBarrett gave the de-interlaced effect solution. I should have known it if I had previously watched Triem's Essential Hitfilm 7 - How to optimize troubleshoot video.
Now, in that tutorial, Triem says that he always converts his footage to a constant bitrate before editing in HF. I can understand this when one has clips from various sources (camera, gopro, smartphone), but is this conversion also necessary when all the clips are from the same source (camera) and shot in 50p?