Video Camera who uses one?

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Re: Video Camera who uses one?

Postby Nate » Fri Feb 18, 2011 1:49 pm

Marto wrote: I will use your scripts for sure (especially slo-mo!).


joo doin a gang star rap veedeo?
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by BNA » Sat Feb 19, 2011 10:04 am

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Re: Video Camera who uses one?

Postby GraemeL » Sat Feb 19, 2011 10:04 am

For the split screen, I just use TMPGEnc Video Mastering Works 5. It allows for multiple video layers in the timeline.

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Re: Video Camera who uses one?

Postby Nate » Sat Feb 19, 2011 10:33 am

Oxford wrote:Just edited my post above (click here) to solve the Appending problem and decided to rewrite the whole script.


Nice work Moss
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Re: Video Camera who uses one?

Postby Aushiker » Wed Feb 23, 2011 2:26 pm

Hi

That looks good Oxford. Well worth considering for a rear camera for sure. The camera you are using do you know what format it outputs in? Just wondering if iMovie will handle it okay.

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Re: Video Camera who uses one?

Postby Nate » Wed Feb 23, 2011 2:36 pm

Oxford wrote:I was getting some twist on the seat stay and seat post mounted cameras, so made a rubber washer from a tube to reduce friction between the two pieces, seems to work so far.


You were provided 2 strips of rubber grip mat for that???
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Re: Video Camera who uses one?

Postby GraemeL » Wed Feb 23, 2011 6:59 pm

Thanks for the pics and info.
I have been testing my setup, using hose clamp and L bracket. If I have some rubber under the clamp it seems to allow the camera to wobble a little bit, It's not huge but enough to notice. I have removed all rubber and everything is rock solid. I need to find some very thin strips of rubber to try.

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Re: Video Camera who uses one?

Postby Boognoss » Wed Feb 23, 2011 7:31 pm

Oxford wrote:
Aushiker wrote:Hi

That looks good Oxford. Well worth considering for a rear camera for sure. The camera you are using do you know what format it outputs in? Just wondering if iMovie will handle it okay.

Andrew

Sorry Andrew forgot to answer your post, the format of the Camshots is .AVI, which most editors seem to handle without issue.


My Otek camera (the red upright looking one) outputs in .MOV format FYI. I didn't buy it with that in mind but as I use iMovie it was a brilliant coincidence ;).
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Re: Video Camera who uses one?

Postby Nate » Wed Feb 23, 2011 8:13 pm

Oxford wrote: by twist I mean the camera would dip. just one of those things I need to have a play to work out the best solution.


Center of gravity - find out where it is & clamp there.
You can also use a small rubber washer between the post clamp & the camera clamp - email me if you want a few sent out.
(use an old tube cut up with a hole punched out)
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Re: Video Camera who uses one?

Postby Nate » Thu Feb 24, 2011 6:30 am

Oxford wrote:Yep that's what I'm doing (tube section with hole punched in it to make washer) and the finessing is finding the elusive COG for the camera.


You should be able to tighten the bejeebus out of it too - i've done them up pretty tight & no issues. (if it breaks let me know!)
Dont forget a secondary restraint on the camera if it breaks too!
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Re: Video Camera who uses one?

Postby hannos » Fri Feb 25, 2011 9:14 am

Speaking of cameras, are any of them any good at night? Come winter a lot of my commute will be in darkness and there's probably not much point having a camera if it can't film anything.
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Re: Video Camera who uses one?

Postby Boognoss » Fri Feb 25, 2011 10:38 am

hannos wrote:Speaking of cameras, are any of them any good at night? Come winter a lot of my commute will be in darkness and there's probably not much point having a camera if it can't film anything.


In my experience the Otek isn't great but with close shaves and helmet-mounted Ayups I usually can light up the rego plate, etc. Night time and raining is appalling though (for the camera and the rider).
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Re: Video Camera who uses one?

Postby Nate » Fri Feb 25, 2011 11:13 am

have a squizz at my reviews page: http://www.rigidmount.com/camera_reviews.html
Oteks are good, Eagle Eye great, Kodak ZX1 horrific.

its going to be VERY difficult to get a plate at night - unless its lit up to just the right amount.
It'll most likely be underexposed or overexposed.
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Re: Video Camera who uses one?

Postby GraemeL » Fri Feb 25, 2011 7:13 pm

I am going for a ride tonight, I will take some footage and post put it up later on.

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Re: Video Camera who uses one?

Postby Boognoss » Fri Feb 25, 2011 7:46 pm

Boognoss wrote:
hannos wrote:Speaking of cameras, are any of them any good at night? Come winter a lot of my commute will be in darkness and there's probably not much point having a camera if it can't film anything.


In my experience the Otek isn't great but with close shaves and helmet-mounted Ayups I usually can light up the rego plate, etc. Night time and raining is appalling though (for the camera and the rider).


Here's an example from my dark outbound commutes in the cooler months last year. Best night shot is at the 1:50 mark when I get cut off in the middle of a roundabout. Note that this was with ghetto-mount BEFORE I became a Rigidmount customer. Now my video is rock solid :mrgreen: .

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Re: Video Camera who uses one?

Postby GraemeL » Fri Feb 25, 2011 11:07 pm

I am always at a loss to understand these idiots. If only they realised, that the 5 seconds of stupidity may end up being 5 years in jail.
Anyway that camera isn't to bad at night.

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Re: Video Camera who uses one?

Postby GraemeL » Sat Feb 26, 2011 1:04 am

Ok here is my night test using the GoPro HD.
I have tried to include different lighting, from some shops to the side streets and a main road.
For those that are curious, the lights we are using are,
Front: Nitelight Illuminator 900 Lumen mounted on our helmets, A Knog mounted on the bars.
Rear: Two planet Bike Super Flashes and two Fibre Flares.

We start out at around 6:45 as the sun is going down....



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Re: Video Camera who uses one?

Postby Marto » Sun Feb 27, 2011 9:02 am

Calibration of video cameras on bicycles for car passing distance

It is hard to know or even guess how close a car passes a bike, even with a camera recording the incident. It has been stated in this forum that calibration of bike videos is needed to be more certain how close a car passed. I couldn't find any calibration description, so I made one up.

I recorded with a handlebar mounted video camera whilst passing a stationary car at marked distances. These distances were: 0.25m, 0.4m, 0.5m, 1m, 1.5m and 2m. These were marked out with sticky notes (photo below shows markings for 0.5m, 1m, 1.5m, and 2m).

Image


I did all this on a street looping through a property development at early stages. The camera was an Otek 126, mounted on the handlebars 6cm right of the mid point of the handlebars, 89cm from the ground. The videos were not cropped or zoomed, but they were resized.

I took snapshots from the videos at the point where the rear wheel of the car is lined up with the right hand edge of the video frame. A few features may be used as a measure of distance to the car. These ones immediately apparent are: where the bottom right corner of the video frame passes on the car (ie: wheel arch height/half way up the car wheel); and the proportion of the right hand edge of the video frame is filled up with the car. The most consistant dimension among cars is the wheel+tyre size. Most car wheels are 15-16 inches with 60 aspect ratio tyres. The car in these pictures has 16 inch wheels, and 55 aspect ratio tyres (lucky me!). The wheel+tyre height is 62cm, and the wheel arch is 68cm at its highest point.

To compare with calibrated images, the video camera has to be in the same position and angle as it was when making the calibrated images, and the resulting video shouldn't be cropped in any way.

My hope is that cyclist may use these photos (where appropriate), or make up a set for their own camera or other vehicles (ie: Commodores, utes, or trucks). Then in our day in court, or in a police report, we can make a good estimate of passing distance based on a calibration of the video system. This gives more credibility (I hope).

I want to put videos up of each calibration distance (running forwards and reverse), but I need to learn to remove (ie blur) the number plate of the vehicle used...

You can see in the following snapshots where the bottom right corner of the video passes on the car.

25cm pass (handlebars touched mirror (very slowly!)):

Image

40cm pass:

Image

50cm pass:

Image

1 metre pass:

Image

1.5 metre pass:

Image

2 metre pass:

Image

As an example, a still from one of my posted videos seems most similar to the 1.5 and 1 metre calibration images (it's not the same car :D ). This is based on the point on the car that lines up with the bottom right corner of the video frame:
Image
Image
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Re: Video Camera who uses one?

Postby Aushiker » Sun Feb 27, 2011 9:18 am

Hi

On the subject of night use of cameras, this is video from a Contour HD1080 at night.



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Re: Video Camera who uses one?

Postby Aushiker » Sun Feb 27, 2011 9:24 am

Marto wrote:Calibration of video cameras on bicycles for car passing distance


Thanks Marto.

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Re: Video Camera who uses one?

Postby uncle arthur » Sun Feb 27, 2011 12:14 pm

I'm a recent camera convert, having bought myself one of these:
Image

I've dodgied up an older handlebar light mount so that I can zip tie the camera on to it - it looks very similar to this:
Image

I tried it out on the Friday bunch last week. Apologies for the watermark - I'm still trying to find a simple free video editing package, but here's what I get.




In this one towards the end of the clip you should be also able to see the fool in the beverage fan who tried to run us over - it doesn't look as close as it really was because I am at the back of our little group.
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Re: Video Camera who uses one?

Postby GraemeL » Sun Feb 27, 2011 1:16 pm

Is the Camshot water proof?

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Re: Video Camera who uses one?

Postby GraemeL » Sun Feb 27, 2011 2:38 pm

Oxford wrote:
GraemeL wrote:Is the Camshot water proof?

Graeme

Yes, I bought them for that reason, just wanted them to be rain proof, but waterproof is better, except that the microphone does not pick up much low level noise. So if you talk to it, unfortunately it may not pick up what you say.


Thanks, I was wondering if it would be suitable for a rear camera. I am not bothered about the audio.

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Re: Video Camera who uses one?

Postby Aushiker » Sun Feb 27, 2011 2:48 pm

GraemeL wrote:Thanks, I was wondering if it would be suitable for a rear camera. I am not bothered about the audio.


Same here. Pretty much convinced now.

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Re: Video Camera who uses one?

Postby GraemeL » Sun Feb 27, 2011 2:53 pm

Aushiker wrote:
GraemeL wrote:Thanks, I was wondering if it would be suitable for a rear camera. I am not bothered about the audio.


Same here. Pretty much convinced now.

Andrew


Yeah I might order one and see how it goes. I wanted to buy another GoPro for the wife to use and was just going to use that from time to time. But if the Camshot turns out to be ok then I might just get 2 of them.

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Re: Video Camera who uses one?

Postby Aushiker » Sun Feb 27, 2011 3:18 pm

Oxford wrote:As a rear camera its not bad IMO, nice and compact, unobtrusive and of course the video is damning and compelling at the same time. :mrgreen:


Hi

Looking at Torpedo 7 it seems that there "Camshot" camera only takes 8 gb cards and has a battery life of 1.5 hours. Does this match your camera?

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