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GPS on HD

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Mark D'Agostino
GPS on HD
on Jun 8, 2009 at 2:49:13 pm

We have been asked to shoot HD video along a 200 mile pipeline from a helicopter using our HDX900. That's easy but this client wants a gps visual overlay on the final product so they can find specific points while viewing. The 900 does have a gps input connector but it really doesn't function as of when we last spoke with Panasonic. Has anyone found a way to make this work?

Thanks so much!

Mark D'Agostino
http://www.synergeticproductions.com


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Noah Kadner
Re: GPS on HD
on Jun 9, 2009 at 12:25:01 am

How do they expect that- a graphic on screen or a GPS file? You could always run time of day timecode, sync up with a GPS unit's clock and save out its log when you're done and provide that log along with the video. I'm sure there's a clever way you could do it.

Noah

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Ernie Santella
Re: GPS on HD
on Jun 9, 2009 at 4:33:59 am

How about using a 2nd smaller camera and lock it down on a shot of the GPS unit. With matching TC you would know where you are all times. Not the easiest to do in a chopper, but possible if it's a big one like a Bell Long Ranger.

Ernie Santella
Santella Productions Inc.
http://www.santellaproductions.com


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Noah Kadner
Re: GPS on HD
on Jun 9, 2009 at 11:57:37 pm

That was going to be my other suggestion- if you put it into a box you could get a nice sharp image free from light changes and even key it over the video. But I wasn't sure if the client wanted an onscreen reference or an actual GPS log. I guess you could get both with this method.

Noah

Check out my new RED Blog. Unlock the secrets of the DVX100, HVX200 and Apple Color.
Now featuring the Lens Adapter Guidebook, Sony EX1 Guidebook,
DVD Studio Pro and How to Light Interviews.
http://www.callboxlive.com


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Ray Palmer
Re: GPS on HD
on Jun 10, 2009 at 1:44:27 pm

Mark,
I have found a product that turns GPS info into an audio signal and then back to GPS.
We have used it to record HD video on any camera by putting GPS information on one of the audio tracks. Leaving a second audio track for a microphone. Here we use a hard wired mic and put the mic into one of the ear muffs. That way it records all of the conversation that happens in the helicopter. Great for a slate.

The GPS, now in audio format, is married to the HD video. The same unit can decode the audio back into a 9pin serial that talks to a laptop.
When we play back the videotape, we use the "Street Atlas" program to show where we got the footage and display GPS information.

When we bought the encoder/decoder it was only $400.

Let me know if this is something that might work for you and I will search for a link.
Ray
602-809-1471

Ray Palmer, Engineer
Salt River Project
Phoenix, AZ
602-236-8224 office
There are three types of people in this world, those that can count and those that can't.


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Ray Palmer
Re: GPS on HD
on Jun 10, 2009 at 1:40:25 pm

Here is the link.
Geostamp.
http://www.icircuits.com/store/prod_geostampaud.html

Ray Palmer, Engineer
Salt River Project
Phoenix, AZ
602-236-8224 office
There are three types of people in this world, those that can count and those that can't.


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Ethan Sigman
Re: GPS on HD
on Jun 12, 2009 at 12:11:10 pm

which part of the gps on the 900 "doesn't really work?" i have a 2700 with the gps module and i get gps data in my meta. not sure how often or if it updates in the middle of a shot, but there is a readout, it may not be precision enough for what your doing, but it is there.

http://www.EZSproductions.com
http://www.VaricamUser.com
http://www.ProductionMeeting.com/profile/EthanSigman


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Ray Palmer
Re: GPS on HD
on Jun 12, 2009 at 2:48:56 pm

Can you explain the work flow? I have two 900's and two GPS modules.
I just haven't been able to get the GPS info out of a deck.
Which deck are you using? Where does the Meta data appear?

I have the front end, meaning the camera. I just haven't figured out the decode end, meaning the deck and display.

The HD decks that I have are the old 130DC, 1200A and 1400.

Ray


Ray Palmer, Engineer
Salt River Project
Phoenix, AZ
602-236-8224 office
There are three types of people in this world, those that can count and those that can't.


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Mark D'Agostino
Re: GPS on HD
on Jun 12, 2009 at 5:06:23 pm

Thanks everyone for the suggestions. I really appreciate it. We were thinking of the "shoot the gps screen with another camera" method Ernie but were hoping for something more elegant. That however may be the best choice if the client wants it supered on the video. We still haven't gotten back how they want this, (believe I know that's a key bit of information). If they are okay with a log for reference then Noah's idea could be perfect. I really like Ray's suggestion if the client is okay with and capable of playing it back the way you described. It's great that the 2700 outputs the gps meta Ethan but unfortunately the HDX900 takes it in but doesn't have a way to get it out. When we first tried this about a year ago Panasonic said they were aware of this issue but didn't have a solution at that time. For that projectI ended up speaking gps coordinates into a mic at 1 minute intervals. The client then reviewed that footage, ( 9hrs of flight time), and using my audio as reference gave us chapter markers based on time code. As you can see we are in a bit of a bind till the client tells us exactly how they need it.I'll let you know how the story ends.
Thanks again!

Mark D'Agostino
http://www.synergeticproductions.com


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Ray Palmer
Re: GPS on HD
on Jun 13, 2009 at 1:05:11 am

Mark,
Are you aware that the Geo Stamp Plus will super the GPS on video?
It is limited to NTSC standard def.
http://www.icircuits.com/store/prod_osd_gpsoverlays.html

Suggestion-
Shoot in HD in the air with GPS through geo stamp and place GPS on the audio track.
Dub the tapes to SD through the Geo Stamp and record the GPS super on that video. Same Time code.
Let the client view the SD on any format he wants.
The time code should carefully be the same on all formats.

At any time he wants to view the footage in HD, use the same time code to locate that footage in HD.







Ray Palmer, Engineer
Salt River Project
Phoenix, AZ
602-236-8224 office
There are three types of people in this world, those that can count and those that can't.


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Mark D'Agostino
Re: GPS on HD
on Jun 15, 2009 at 3:38:05 pm

Hi Ray,
Thanks a bunch for helping with this. I spoke to Chris at Intuitive Circuits. They make the GeoStamp. He said we would need to use the "GeoStamp Audio" to record the data to our audio track and then playback through that AND the "GeoStamp+" to output SD with the data supered. This would be a piece of cake if we were recording SD to begin with but that's not an acceptable compromise.

Mark D'Agostino
http://www.synergeticproductions.com


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Ethan Sigman
Re: GPS on HD
on Jun 25, 2009 at 5:24:08 pm

Mark,
will the 900 push gps meta out the HD-SDI? can you hook an hpg20/"gear" to the hd-sdi, record to .mxf with meta for gps? you would also get the added advantage of recording avc-intra if you used a hpg20, but you could use an hpg10 and record dvcpro if you need to match other footage shot with 900..... still not sure the gps works the way you need it but that might get you the data.....
Ethan

http://www.EZSproductions.com
http://www.VaricamUser.com
http://www.ProductionMeeting.com/profile/EthanSigman


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Andy Kolcz
Re: GPS on HD
on Sep 3, 2009 at 6:09:49 pm

Ray,

I found your post through a Google search. We are using a fairly expensive commercial system (h/w and s/w) to record GPS signal on the audio track and then view & process the video with a synchronized map "live" at the office. It is quite an expensive system and I've been asked by clients to see about any cheaper alternatives. You mention the cost of $400, could you perhaps post a link to the vendor?

Thanks a bunch,

Andy
Just another traffic engineer...


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