On Location, Firewire, and Distance

OK, I realize that Firewire is the way to connect the cameras to the CS4 computer, and my camera only provides firewire output. I understand firewire has a limit of 9 feet. Does anybody have a solution for using On Location with multiple cameras that are both a hundred feet or so away from the computer, when both the computer and the camera are firewire?

The standard FW distance limit is 14.5 feet, not 9. Also, there are cables of this length available with active repeaters (they do need the 6-pin FW connector for powering the repeater). I've successfully cascaded as many as 3 of these cables (see http://sewelldirect.com/firewireextension.asp). Of course the head end must be able to provide the aggregate power needs of all the repeaters. I've had no need to determine what those needs are so I can't comment on that.
Having said that, the cable limit is meant to preserve the full FW bandwith of 400Mbps. Since the camera video (with audio) bandwith requirements are much more modest, only in the 25Mbps range, it follows that extending the cable length is certainly possible without detrimental effects. There are cables available in 60 foot (and up) lengths, these are 4 pin to 4 pin configurations and I have in my OL kit bag both 75' and 125' lengths that I've used successfully for multicamera setups such as you appear to need.
For a variety of long FW cables go to http://www.fullcompass.com/product/243858.html
Message was edited to add link

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Firewire and distance question

Hey everyone. I have a problem I thought could be solved by implementing a long firewire 400 cable but I've been reading up on this and have some questions. I know this is a final cut forum but I've been posting here for years and thought maybe some other editors might have tried something like this and have some insight.
I have 3 sony handicams. Vx2100's. I'm running all of them to a Sony Anycast Video mixing board. I need to set the cameras about 30 ft away from the anycast. I've been connecting them with s-video cables as I only need video. However, sometimes the video gets out of sync with the audio. The Audio is being supplied by an AKG 414 mic with XLR. I don't know what's causing the syncronization issues but I thought- maybe if I switch to a better cable system that would help.
The cameras offers regular RCA jax as well as a firewire jax to output. I thought maybe I would try a 30 ft firewire cable but after reading up on it this sounds like it may cause more issues as firewire was not made to be used in lengths of over 15' or somewhere around there. I will need twice that distance.
Does anyone have any suggestions or thoughts on this? I also read that as long as you don't need to power your devices that using a long firewire cable would work just fine? I can't tell fact from fiction. Can someone help me out?
Thanks.
-Drew

Hey Drew
+What does a repeater actually do? I'm guessing it's some kind of powered receiver that get's a signal and spits it back out ...+
Exactly.
+If I come in firewire what does a repeater go out to? I'd need, DV, RCA or s-Video+
Well, it goes back out to Firewire (DV) ... Sorry if I misunderstood, I had thought that was what you were trying to do ie to extend the reach of the DV signal whilst maintaining it's eventual format.
+Maybe I'll just stick to S-video. Do you happen to know the limit on that? I need to go about 30 ft.+
Should be fine. S-Video is good for about 100ft - 150ft, if you have good quality cables. Conservatively speaking I wouldn't want to run any analog cables more than 50ft if I could avoid it as the signal strength is going to degrade the longer you run it (you'll still get a picture on the other end but it wont be as good) ... but as you're only going 30ft you should have absolutely no worries at all.
Best
Andy

How to find a second point on a line given a point and distance

Hi All,
My requirement is: Given a point on a line and distance, I have to find the second point. All geometries are in LRS.
I tried using SDO_LRS.LOCATE_PT, it is returning the second point from the start of the segment but I want to locate the point from the given start point. Kindly suggest in how to solve this.
SQL Used:
SELECT SDO_LRS.LOCATE_PT(a.shape, m.diminfo, 9, 0)
FROM lrs_access_fiber a, user_sdo_geom_metadata m
WHERE m.table_name = 'LRS_ACCESS_FIBER' AND m.column_name = 'SHAPE' AND a.unique_id = 1996;
Regards
Venkat

Hi Luc,
Thanks for the information. I have implemented this in a slightly different way like:
1. Firstly, found the distance (Distance_a of the point selected from the start point of the segment using:
SELECT SDO_LRS.GET_MEASURE(SDO_LRS.PROJECT_PT(a.shape, m.diminfo,MDSYS.SDO_GEOMETRY(2301, 8307, NULL, MDSYS.SDO_ELEM_INFO_ARRAY(1, 1, 1), MDSYS.SDO_ORDINATE_ARRAY(xa,ya, NULL)) ), m.diminfo ) into Distance_a FROM LRS_ACCESS_FIBER a, user_sdo_geom_metadata m WHERE m.table_name = 'LRS_ACCESS_FIBER' AND m.column_name = 'SHAPE' AND a.unique_id = Input_Fiber_Id;
2. Then added the given distance (b) to this computed distance (Distance_a ) to get the distance of the second point (Distance_b).
Distance_b := abs (Distance_a + b);
3. Then used SDO_LRS.LOCATE_PT with offset=0 and distance=Distance_b to get the second point.
select SDO_LRS.LOCATE_PT(a.shape, distance_pt, 0) into point_geometry from LRS_ACCESS_FIBER a where a.unique_id = input_fiber_id;
Please give your inputs and feedback.
Regards
Venkat

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Hello! Resetting the ports is done by resetting the pmu. press the button once with all external cables unhooked. Below is a pict of an example of the pmu location. Also an intermittent problem is often a bad cable. Tom
[IMG]http://img470.imageshack.us/img470/1623/mddlogicbd4ga.jpg[/IMG]

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Message was edited by: Woildbill

I just spent several hours dealing with this when switching to a new PC. It was extremely frustrating as I knew my files were on my external HD but no matter how many times I copied my old iTunes folder over the files were still missing...because dummy me had forgotten to "unhide folders" on my new PC and my old files were actually stored in a hidden folder created long long ago.
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We recently updated to Lion, prior to this update we could plug in our Sony Mini DV camera using the appropriate firewire and the iMovie would recognize the camera. This function no longer works after the update to Lion. Any suggestions?

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Ross Dehovitz1 wrote:
I have an ibook and a G5., I have a 500 gb lacie external drive.
Can i back up both via time machine simultaneously, one via firewire and one via USB?
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On Location, Firewire, and Distance

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