Livestream w/ EX3 + MXO2 LE at DVinfo.net

Christoph Gelfand · March 7th, 2011, 08:44 AM

On the advice of a few folks on multiple forums I purchased the MXO2 LE to stream a live event to Livestream. My setup was a 2007 MacBook Pro, a video switcher (Panasonic HS50N) and 3 x Sony EX3s. I took an audio feed from the audio tech and fed it into the MXO via XLR.

Connectivity was easy, Livestream interface was easy, and it looked great. However, when I got home I watched the recorded streams off of the Livestream site and noticed an audio delay off at least a second or so. In post production this would be crazy, but in streaming there's a bit more leeway and the client wasn't bothered, but I was and would to figure it out.

I was streaming on a Pro account with a dedicated Ethernet line so the connectivity seemed solid, but I wondered if you'd ever experienced this before? I thought it could have been the board feed, but then I also wondered if perhaps because we looped the video switcher through a video monitor if that introduced latency to the video as well. Any thoughts?

Ryan Sarver · March 7th, 2011, 10:49 AM

More than likely it is your switcher. Switchers usually have some sort of latency. To offset this you would need some sort of audio delay to get them synced properly. That has been my experience working in venues with switchers and IMAG

Christoph Gelfand · March 7th, 2011, 08:21 PM

This makes sense. Any suggestions on reasonably priced audio delay boxes? Livestream seemed to imply that the issue was in the MXO2 because they don't officially support the device- however it works fine, save for the slight audio delay.

The hardest part is properly testing the stream where you can see audio and video together...

Duncan Craig · March 8th, 2011, 10:01 AM

If it's simply adding a delay to an analogue signal then any audio delay effects unit will do the job.
It might be something as simple as a guitar effects pedal, through to a more advanced 19 inch rack system.

You can hopefully work out the exact latency by maybe recording the stream and filming a clapper board, or just clapping in vision, then work out the frame delay accordingly.

In fact having your post again, I think you mean the video was delayed, hence you need an audio delay. Just to clarify.

Charles Grinbaum · July 8th, 2011, 06:05 PM

Chris,

Did you get the delay issue figured out? I to am about to start broadcasting feeds filmed with a switcher onto LiveStream. Did you buy the premium account from LiveStream for the month? Have you been satisfied with the service? I am going to double check right now my audio/ video synch. For certain events it's not a big deal but for others that could be seriously distracting.

Dave Sperling · July 8th, 2011, 06:26 PM

Was the audio in advance of the picture, or behind it?
Was the advance/(delay) consistent?

March 7th, 2011, 08:44 AM	#1
Christoph Gelfand Regular Crew Join Date: May 2008 Location: Philadelphia, PA Posts: 116	Livestream w/ EX3 + MXO2 LE On the advice of a few folks on multiple forums I purchased the MXO2 LE to stream a live event to Livestream. My setup was a 2007 MacBook Pro, a video switcher (Panasonic HS50N) and 3 x Sony EX3s. I took an audio feed from the audio tech and fed it into the MXO via XLR. Connectivity was easy, Livestream interface was easy, and it looked great. However, when I got home I watched the recorded streams off of the Livestream site and noticed an audio delay off at least a second or so. In post production this would be crazy, but in streaming there's a bit more leeway and the client wasn't bothered, but I was and would to figure it out. I was streaming on a Pro account with a dedicated Ethernet line so the connectivity seemed solid, but I wondered if you'd ever experienced this before? I thought it could have been the board feed, but then I also wondered if perhaps because we looped the video switcher through a video monitor if that introduced latency to the video as well. Any thoughts?

March 7th, 2011, 10:49 AM	#2
Ryan Sarver New Boot Join Date: Jan 2007 Location: Indianapolis, Indiana Posts: 22	Re: Livestream w/ EX3 + MXO2 LE More than likely it is your switcher. Switchers usually have some sort of latency. To offset this you would need some sort of audio delay to get them synced properly. That has been my experience working in venues with switchers and IMAG

March 7th, 2011, 08:21 PM	#3
Christoph Gelfand Regular Crew Join Date: May 2008 Location: Philadelphia, PA Posts: 116	Re: Livestream w/ EX3 + MXO2 LE This makes sense. Any suggestions on reasonably priced audio delay boxes? Livestream seemed to imply that the issue was in the MXO2 because they don't officially support the device- however it works fine, save for the slight audio delay. The hardest part is properly testing the stream where you can see audio and video together...

March 8th, 2011, 10:01 AM	#4
Duncan Craig Major Player Join Date: Jul 2003 Location: Leeds, UK Posts: 660 Images: 10	Re: Livestream w/ EX3 + MXO2 LE If it's simply adding a delay to an analogue signal then any audio delay effects unit will do the job. It might be something as simple as a guitar effects pedal, through to a more advanced 19 inch rack system. You can hopefully work out the exact latency by maybe recording the stream and filming a clapper board, or just clapping in vision, then work out the frame delay accordingly. In fact having your post again, I think you mean the video was delayed, hence you need an audio delay. Just to clarify. __________________ FCPX/LS300/EX1/FS100/GoPro/Vinten/HotHead/Jib/Track/Dedos/Lightstorm/Coollights

July 8th, 2011, 06:05 PM	#5
Charles Grinbaum Tourist Join Date: Apr 2011 Location: Los Angeles, California Posts: 3	Re: Livestream w/ EX3 + MXO2 LE Chris, Did you get the delay issue figured out? I to am about to start broadcasting feeds filmed with a switcher onto LiveStream. Did you buy the premium account from LiveStream for the month? Have you been satisfied with the service? I am going to double check right now my audio/ video synch. For certain events it's not a big deal but for others that could be seriously distracting.

July 8th, 2011, 06:26 PM	#6
Dave Sperling Major Player Join Date: Jan 2010 Location: Tinton Falls, NJ Posts: 780	Re: Livestream w/ EX3 + MXO2 LE Was the audio in advance of the picture, or behind it? Was the advance/(delay) consistent?