Hi, anyone knows if exist a tool, an Excel file, or simply a way to extract/make hdv/tbc/tgm lines or data from an onboard lap like this (2016 Italy GP)? If they don't exist, would be a good for physics making, especially for beginners@this point...
A video can be a form of telemetry but a really poor one generally. You can have things like gps for speed, acceleration sensors for Gs and other measurements for things like steering wheel and pedals. But it is really hard to use the video because you don't know where those measurements come from. What's the delay for the numbers. F1 videos I think try to get the rpm values from the sound by analysing its frequency and couple other things. Acceleration sensor could be installed anywhere on the car and the position does matter. Speed could be gps or from drivetrain or even from airspeed. Is the correlation 100%? You need to verify that for every single number you plan to use. Even if you want to replicate some of that data in sim pretty much need to match the exact scenario. So if you have a video that shows speed and lat Gs then you could theoretically try to match a corner speed if you have laser scanned track, know your fuel loads, know the driver is pushing 100%, know the track conditions, know the engine modes and turbo settings. Some of that matters less than others but if you can collect enough reliable datapoints then some of that will work as numbers that you can use to check your numbers. Most modders probably don't have access to tire measurements, real aero data or even engine dyno plots. But if you are smart you can get pretty close by analysing what you have. One crucial thing to get right is the numbers for downforce, drag, engine power and tire grip. That's generally 99% of the lap time correlation right there but to get the relationship right for power/drag/downforce/tire grip you also need corner speed analysis. A good onboard video can allow you to match the corner speeds (downforce, grip). So if you have too much tire grip but too little downforce on your car your lap time could be correct but your high speed corners are too slow and low speed is too fast. But you still want as many datapoints as possible. But data validation is crucial. For example when building historic race cars there are insane amount of videos in youtube with old guys driving the cars at 8/10ths. Sometimes there is traffic that slows down the camera car and makes it go less fast at some point in the next turns. Not to mention that even the f1 drivers don't get it right in every corner. So even if it is the fastest lap ever it is not optimal lap. Also f1 cars are very special case. Just going from comparing one corner from one track to other corner from other track can be really difficult because you have different tires, different aero and different engine as well because the electric motor power is spent differently. And naturally you want a fast sim driver if you want to compare corner speeds with fast real world driver. You don't need greger huttu to drive your sim car because it is likely the real car is not driven by hamilton or vettel either but your driver should not be far off. An onboard video can give some useful data bits but you need to be really careful because if the video is not representative of the car's pace then your efforts may actually take you further away from the real car than towards it.
I agree with this and would like to add: there is absolutley nothing in any Video, that can be extracted by a Tool as usable Data for rFactor2 Files.
