Change video codec for capture to be libx264 with loseless options

As discovered, 646fbbe
went from -f v4l2 -vcodec libx264 -pix_fmt yuv420p -threads 0   to   -c:v copy
which results in totally uncompressed recording... may be was done so that CPU
fan does not make  noise... I do not know.  So I have now changed config in deployment
to do use this libx264 options which chatgpt said would be the ones for loseless compression.

Capture/videocapture/config.yaml

@@ -43,7 +43,7 @@ ffm_opts:
   #
   #v_dev: "/dev/video4"
   v_dev: "auto"
-  v_enc: "-c:v copy"
+  v_enc: "-c:v libx264 -preset veryslow -crf 0"
   pix_fmt: ""
   n_threads: ""
   a_enc: "-acodec aac"