seperate audio and video streams

[kamnet]

Excellent guide, Bobgrosh! Thank you!

[bobgrosh]

Originally Posted by swanwick

Wow. Bobgrosh, you are one heck of an expert.

Ever try to build a web page that shows two live streams on the same page? Either two different video streams or one video stream and one for images/slides?

You mean like this one?

http://theallyvideo.blogspot.com/

When we go live, I use my Sony laptop to broadcast trains running in the back yard.
The laptop has a built in camera at the top of the LCD display pointing at the operator.
I also connect a Logitec USB camera to the laptop. It points the opposite direction.

The neatest shots are when I set the laptop on the ground next to the train tracks. The logitec camera catches the trains as they approach. They display in the large window on the left. When they pass the laptop, the built in Sony camera sees them receding into the distance and displays them in the smaller video on the right.

Since each camera has it's own stereo mic input. I set the balance so the Logitec right mic is all the way down, and the Sony left mic is all the way down. This way when the train passes, the viewer sees and hears the train approach on the left video and speaker, then sees it going away on the right video and speaker. I set all this up using command lines in scripts to send both videos to Moguls via the flash live media encoder so that one button click puts both cameras on line.

Prety simple to do really, add a new channel but add something like "backstage" to your regular channel name. Embed your main channel on the left side of the page and the backstage channel on the right. The easiest way to do this is to set up a 1 high by 2 wide table on the web page and put the code for each channel in a different tbale entry.


Here is another example I use when I want to check on all the garden train channels.
http://wwgttmultiview.blogspot.com/

Bob

[WiFiTech]

Follow me on this for a second.
Lets assume that you loop your Speakers out to the Mic in.
Lets assume you use Y splitters to allow you to still have a headset (mic and speakers)
Lets assume you use Skype Conference (or some audio capable IM)
Lets assume all Audio is OFF in the Studio Broadcast.
Wouldn't this allow any of the Mogulus video sources to be used and the audio from any of the producers would be heard. Since it is a conference, then regardless of who is speaking, the audio should be "the single skype conference call".
I will test this theory and let you know, but I am not seeing where it wouldn't work.
Of course, Audio Levels would have to be tested and the conference call bandwidth might come into question. I just don't see why that wouldn't work.
Just a thought,
Kevin

[pblive]

We've been trying to find a workaround to cut back & forth to co-hosts and such who aren't in the studio but can't find anything good yet.

We HAVE been using Skype through the speakers for guests when the soundboard is being wacky or we're on the road or something. It works fine. Audio quality isn't great for you or the person over Skype but it works and is FREE!

Set Mogulus to use the internal microphone for your computer for Audio In.
Set Skype to use the Speakers for your computer as Audio Out.
I've found that there's less echo if you use a headset and have Skype use the headset for Audio In.

[kamnet]

Originally Posted by WiFiTech

Lets assume that you loop your Speakers out to the Mic in.

This would immediately fail, it would create a feedback loop, which would result in a loud echo and audio distortion.

Pblive has it correct, though - set Mogulus' audio source as the Audio In (or Mixer, Stereo Mix or On-Board Sound, it may be labeled differently depending on the drivers) for your sound card, set Skype to use the speakers as Audio Out or Line Out. This will create your desired effect, all audio from Skype will be sent through the computer as one combined audio.

Realize that Skype's audio uses a lot of bandwidth, which is part of the reason that Skype's audio is the head-and-shoulder's leader of audio quality of P2P/VoIP applications. You will need a large upstream bandwidth (at least 1Mb/s IMO) to be able to properly send and receive all of that audio in addition to the video.

[jcoffill]

Originally Posted by hmg_ekn

I too am looking to use one audio source with multiple cameras running on separate laptops. Any help would be greatly appreciated.

Likewise, I need to select 1 of the laptops for the audio source for the live broadcast that will be sustained when I que video from 2nd laptop. First laptop has sound from hard wire but laptop 2 audio is from wireless source and is not acceptable when compared to hard wire source. Looking for topside software solution, can't really get hard wire to 2nd laptop.

[insidernews]

Originally Posted by kamnet

Pblive has it correct, though - set Mogulus' audio source as the Audio In (or Mixer, Stereo Mix or On-Board Sound, it may be labeled differently depending on the drivers) for your sound card, set Skype to use the speakers as Audio Out or Line Out. This will create your desired effect, all audio from Skype will be sent through the computer as one combined audio.

Hi, I'm under Vista and I still couldn't find audio mixer within my audio setups. Should I use another software to mix Skype audio with my Mic audio?

Best regards.

[eurotrash]

What can I do if I want to broadcast a concert using one audio source and many cameras?

I cannot have the audio interrupted when I switch between cameras.

I'm not sure if this has been discussed in this thread after having read everything... above all, not for Mac, the platform I'll be working from.

Thanks!

[jayctn]

Ok, we've solved this problem for our show. This works in a studio setting where we have plenty of bandwidth. I'm currently working on a mobile setup which I'll document once we get it working to broadcast via 3G service, but I'm concerned we won't be able to take calls while driving down the road due to bandwidth issues.

Ok, first we have a Broadcast computer running Vista (Core 2 Duo with 2 gigs of ram).. This computer has the latest version of Wirecast installed and 2 firewire ports. Each of our co-hosts wear headphones which are plugged into the line out (speaker out) jack via a simple y-adapter on this computer, this allows our co-hosts to hear audio from callers or videos they are playing.

We have 1 Sony Digital 8 camera connected via firewire, We have a cheap USB Logitech Webcam connected via USB, and finally we have a Canopus ADVC100 (we had this already cheaper solutions can be found using usb) connected via firewire.

Then we have a second computer, which we use for playing videos, taking Skype phone and video calls, as well as taking calls from any other IM product both audio and video. This computer runs Windows XP, and is just a standard low end desktop...

We take composite video out from the video card on the second computer, and run it into the 'Broadcast' computer via the ADVC100. Plugged into the mic in jack on the second computer is a simple y adapter which takes the mic plugs from our headsets in as an input. (This allows Skype users to hear us without creating an echo).

Then we have a cheap audio board (Radio Shack $40), which takes Line out (Speakers out) on the second computer into channels 1 and 2, and we have a single omni mic sitting on the desk that plugs into channel 3 on the board. We take the output from the board and plug it into the Line In jack on the broadcasting computer and select this as the input for Wirecast.

This works very well for us, we take half a dozen calls live per show, and are able to communicate with our guests without a problem. We've done Video calls on a regular basis and those work pretty well, and look smooth. This gives us the ability to place a remote person PIP with us live on screen.

If you'd like to see the results, you can view or channel at www.livestream.com/airsoftv

This was setup with what we had on hand, it could be redone using less expensive equipment, and I'm working on a laptop version to allow us to do live from the road segments. I'm happy to answer questions if you have any.

[patnaik2000]

If you are using the studio, you must connect the same audio source to both computers in order for it to work. Please note that when using multiple cameras in the Studio, you may experience an audio latency issue or audio overlaps. I would recommend that you use a program such as Wirecast (http://www.telestream.net/wire-cast/overview.htm) or Tricaster (http://www.newtek.com/tricaster/)

Best Regards,
Customer Support