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Thread: Video feed question???

  1. #1
    Maximum Bitrate locs4dayz's Avatar
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    Question Video feed question???

    Finally got around to connecting my headrest monitors to the carpc, but have a question. If a video signal is being sent to a single monitor from my pc and DVD player at the same time, what would happen? Would my monitor be damaged, or would one signal override the other? The one headrest monitor is also a DVD player and has a menu to choose aux in for my tv tuner signal, but the other one only has one video in, which is hooked to the DVD monitor video out. When I switch the signal on the DVD monitor to aux in, only the DVD monitor receives a signal from the TV tuner, the other no signal. So I added a video splitter cable to the other monitor aux in so it can receive a signal from the TV tuner directly like it does from the DVD, which solved the problem as far as being able to receive a signal from either source(was able to test it by setting the video mode to TV in bios, since my motherboard supports TV out...but not LCD and TV at he same time, which is why I bought a converter). Will the signals be mixed if the DVD monitor is in DVD mode since the other monitor would during these times be receiving a signal from both sources, or would one signal override the other? Need to know this because if the signals are going to mix I may need a toggle switch to turn off the TV tuner feed to the other monitor when the DVD monitor is in DVD mode...if the DVD headrest signal will override the TV tuner signal when in DVD mode, then I'm good as is. My VGA to RCA signal converter will be here next week, so I can't test the theory and see for certain at this point til its installed. Here is the converter... http://cgi.ebay.com/ws/eBayISAPI.dll...=STRK:MEWNX:IT

    Thanks for any input in advance!!!
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  2. #2
    FLAC SNOtwistR's Avatar
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    my head hurts ... i gotta read this like 10 times to understand it

  3. #3
    Maximum Bitrate locs4dayz's Avatar
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    Quote Originally Posted by SNOtwistR View Post
    my head hurts ... i gotta read this like 10 times to understand it
    Whats confusing you? I'm trying to be real specific about how my monitors are hooked up together to get a correct answer. If two separate video signals(DVD and TV) coming from two different sources(DVD headrest player and TV tuner card) at the same time to one monitor(the one with only one video in, but can now receive signals from both sources using a Y splitter cable), will one signal(preferably the DVD signal) override the other when active, or will I need a toggle switch?. Don't want to damage the monitor!!!
    Linux(Learning the curve...Like when driving!!!)
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  4. #4
    MySQL Error soundman98's Avatar
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    for the $3 it will cost for a switch, it is just not worth the hasle.. it will save all the time and possible headaches with the current setup..(all you need is a spdt switch..)

  5. #5
    Maximum Bitrate locs4dayz's Avatar
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    Quote Originally Posted by soundman98 View Post
    use a switch. it will save all the time and possible headaches with the current setup..(all you need is a spdt switch..)
    Thanks Soundman98...that's what I thought, but wanted to confirm. A toggle switch is an easy fix, but I had hoped not to have to do any more fabricating to make the hole for the switch...no big deal though...Thanks!!

    I guess I'll put the switch on the console next to the shifter knob just for the one monitor with the dual signal input...the DVD monitor is set up properly good as is. One that lights up when in the ON position.
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  6. #6
    FLAC SNOtwistR's Avatar
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    Well after re reading I really think you will need a video switcher box. There used to be a 4 in 1 unit pretty cheap at radio shack/the source. Although I have never tried putting two sources to one input. If you do connect it let me know the results Good Luck! SNO

  7. #7
    MySQL Error soundman98's Avatar
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    Quote Originally Posted by SNOtwistR View Post
    Well after re reading I really think you will need a video switcher box. There used to be a 4 in 1 unit pretty cheap at radio shack/the source. Although I have never tried putting two sources to one input. If you do connect it let me know the results Good Luck! SNO
    in the world of hobbyists, we don't need no stinkin' video switchers :P

    all that needs to be switched is the positive lead of the rca-- as long as you use a spdt for that, and combine all the grounds, it will be fine, and then you don't need to worry about figuring out where to fit a huge switcher..

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    way more complicated then it needs to be.... get an auto switch-no fabrication required.

    Then it will automatically switch to whichever input has signal. Example:
    http://www.amazon.com/Arista-Automat.../dp/B00008NJEF

  9. #9
    Maximum Bitrate locs4dayz's Avatar
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    Quote Originally Posted by justchat_1 View Post
    way more complicated then it needs to be.... get an auto switch-no fabrication required.

    Then it will automatically switch to whichever input has signal. Example:
    http://www.amazon.com/Arista-Automat.../dp/B00008NJEF
    Problem is the DVD player starts by default when powering on the DVD player, and you have to use the remote to change to aux in. The video signal from the PC starts when the PC is powered on(thus the reason two signal are being sent at the same time). When the headrest DVD player is set to aux in, all will be well. But when the headrest DVD player is set to DVD(default), this is where my problem lies. How will an automatic switcher know to switch to DVD input by default when there is a signal coming from both sources ONLY when the headrest DVD player monitor is in DVD mode? Hope I'm not confusing anyone.

    UPDATE: Found the PERFECT switch for my project...don't have to worry about someone else accidentally turning on the PC video feed before I switch the DVD headrest to aux in... http://cgi.ebay.com/ws/eBayISAPI.dll...=STRK:MEWNX:IT
    Linux(Learning the curve...Like when driving!!!)
    Worklog!!!http://www.mp3car.com/vbulletin/fabr...l-worklog.html

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