Nige`s Destination Nurburgring 14 Report of a brilliant trip

[Craikeybaby]

Harry's Lap Timer software with the iPhone/GoPro control with a Bluetooth OBD2 dongle and GPS receiver may do it, but you've got quite a few bits of hardware there, although they should all be in sync.

[Wh00sher]

Craike:Dybaby said:

Harry's Lap Timer software with the iPhone/GoPro control with a Bluetooth OBD2 dongle and GPS receiver may do it, but you've got quite a few bits of hardware there, although they should all be in sync.

It would, but OBD2 !? This is Megasquirt V1 I`m talking about, OBD wasn`t around then


There are systems that do all the Syncronisation in the hardware, Racelogic VBox for example or Harry`s laptimer do the job. The way I do it sounds complex, but that`s just because I`ve tried to share the detail. The hardest bit is making sure the GPS log matches the video you are trying to sync it to. I`ve had it where the first half dozen corners is a match, then it goes out of sync. Took me a while to realise it was from a different session....


If you just want to share a video, a simple cheap camera wired up to a switch will do. Upload to Youtube and job done. I used to do that but I`ve found the videos are more interesting to watch and feedback says the same if there are things like speedo, throttle etc on too. You don`t NEED them, this is only a hobby and it`s not as if we`re doing this professionally but having watched plenty of other peoples incar without any overlay I prefer more info.

[Toilet Duck]

Wh00sher said:

There are systems that do all the Syncronisation in the hardware, Racelogic VBox for example or Harry`s laptimer do the job. The way I do it sounds complex, but that`s just because I`ve tried to share the detail. The hardest bit is making sure the GPS log matches the video you are trying to sync it to.

I've got a similar set up to you, with multiple cameras (Mobius and GoPro) with a datalogger, and I too have to manually sync all the feeds/data up together when knocking up a video. The easiest way I've found is to start all the cameras and data logger, then press the brake pedal at the same time as the car horn. That way, I sync all the video feeds by listening for the cars horn and lining them up, and sync all that to the data logger by looking for an initial spike on the brake pressure trace and aligning that with with the horn. If you aren't logging brake pressure (didn't see it on your video), you could just floor the throttle as you press the horn. Hope that makes sense, if it does then it may even be of some help

[Wh00sher]

Toilet Duck said:

I've got a similar set up to you, with multiple cameras (Mobius and GoPro) with a datalogger, and I too have to manually sync all the feeds/data up together when knocking up a video. The easiest way I've found is to start all the cameras and data logger, then press the brake pedal at the same time as the car horn. That way, I sync all the video feeds by listening for the cars horn and lining them up, and sync all that to the data logger by looking for an initial spike on the brake pressure trace and aligning that with with the horn. If you aren't logging brake pressure (didn't see it on your video), you could just floor the throttle as you press the horn. Hope that makes sense, if it does then it may even be of some help

I don`t have a Horn or brake pressure logging, but otherwise I agree

I often accelerate, brake, accelerate a number of times in the paddock. Not a quickly but enough to see on the video and get a starting point. The fine tuning of a tenth forwards or backwards is done by rendering a short clip of 10 seconds or so and adjusting the inputs to get that correct.

[Humour]

Its all interesting stuff to understand implementations and different solutions to a problem, so to speak.

In our case we are working with a BMW E36, which according to my understanding has OBD2 so it does open up a few options, albeit the port is in the most awkward place (under the bonnet). However we are so far away from being in a position to put something in place (complete rear end rebuild pending, followed by cage install, suspension, etc.) that all I can do for now is be nosey and use my time to research and acquire knowledge on the subject

and I appreciate Nigel that you are prepared to share.

The issue I see is that the video capture has to be tied to plugging a specifically designed video sensor into a Vbox datalogger for auto sync for example, or in the case of Harry's solution the Phone's camera, the former making it a very expensive solution, the latter limiting the quality of the video sensor and the position of it in the vehicle. Having the flexibility to use a video sensor of your choice and to locate this in a position of your choice then limits you to having to manually sync data and video by the various methods mentioned here. I wonder if an integrated solution can be put together with something like a RPi to do OBD data capture + Video + GPS all in one unit.

Humour

Edited by Humour on Tuesday 31st May 20:43

[Steve H]

Humour said:

In our case we are working with a BMW E36, which according to my understanding has OBD2 so it does open up a few options, albeit the port is in the most awkward place (under the bonnet).

An OBD plug will be 16 pin and inside the car, the round plug under the bonnet of an E36 is the BMW layout - not OBD. It may be possible that the engine ecu still talks on some of the same protocols as the OBD stuff but I haven't heard of that before.......

Some beemers did have the OBD plug under the dash (drivers side) and the round plug, they were obliged to use the 16 pin for OBD engine comms but hadn't migrated it all over for the other functions at that point.