I recorded videos where I test input lag of different setups. Do you have recommendations about what software to use to play videos (frame by frame) so that one can calculate frames to estimate how much input lag there is?
At least VLC, totem or Openshot don’t seem to support this. Or maybe they do I just don’t know howto enable such playback mode.
The default binding for the e key in VLC is Next frame. I use ffmpeg to add time stamps and frame counts to the bottom to keep more precise track of location.