Help Analyzing Webcast Data

Conversations around originating a webcast for conference, including cameras and mixers.
richphillips
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Help Analyzing Webcast Data

Postby richphillips » Mon Aug 29, 2016 6:53 am

I have recently been made responsible [read as novice] for the upcoming Stake conference webcasts. I have hooked up the built-in SD camera, vidiu and atlona converter and ran a webcast test about 10 days ago. The test did not go well. Similar to problems we have had in previous webcasts: low audio at the receive sites even when crab boxes and chapel audio are set at max with the volume controls; and some poor quality video with pixelations, buffering and drop-outs.

I am addressing the audio problems at the receive sites with a couple of different solutions to improve the headphone output before going into the crab box.

The video and overall broadcast quality is another matter. I had the broadcast site at the Stake center and six receiving meetinghouse sites [two failed to show up]. Using the event analysis from the portal site, the broadcast health was 54 and my best receiving meetinghouse site was 53. I also had a brother with a laptop, connected via the Stake center wifi, in the broadcast site, also log in, and his health is reported as 97? Not sure why his was so good and the others so bad.

I didn't find any real troubleshooting help on mhtech for webcasting.

Is there a primer somewhere that tells how to use the analysis from the portal?

I don't know what half the measures in the logs mean so I do not know the relative good and bad. And I don't know what they would be pointing me to change. Because of the low numbers, I suspect there may be something wrong in the settings of the camera, vidiu, atlona converter or firewall. As far as I know, I have set the system up according to the directions from the mhtech website.

I have posted the data in an excel workbook at:

https://docs.google.com/spreadsheets/d/ ... sp=sharing

If any of you experts can steer me in the right direction, I would very much appreciate it.

Thanks in advance for any help you can provide.

lajackson
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Re: Help Analyzing Webcast Data

Postby lajackson » Mon Aug 29, 2016 9:26 am

richphillips wrote:The test did not go well. . . .
I also had a brother with a laptop, connected via the Stake center wifi, in the broadcast site, also log in, and his health is reported as 97? Not sure why his was so good and the others so bad.

I am no expert, so you will want to get a second opinion, but it appears you barely have enough Internet service to consider streaming a broadcast.

And since the stake center WiFi was on during the test, your assistant with the laptop was able to snag most of the bandwidth and receive the broadcast, not really leaving you enough to send a good feed.

I would suggest you start by looking at your meetinghouse Internet speeds, then retest with WiFi turned off to one building until you find settings that will give you a good signal. Then add the others.

The receiving sites will continually try to bump up to 1.5Mbps, so if they do not have that much bandwidth available, you will want to set those receiving computers/laptops to stay at whatever level their ISP supports, i.e., 400k.

And if you do not have 2M at the sending site, you will have a very difficult situation. That's one of the reasons turning off WiFi is so important.

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pete.arnett
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Re: Help Analyzing Webcast Data

Postby pete.arnett » Mon Aug 29, 2016 9:49 am

We had the same Video Info event as you did for our broadcast dated: 2016-08-21 10:00 AM - 12:00 PM

EncoderType Teradek
AudioSampleFrequency 48000
AudioChannels 1
AudioCODEC mp4a.40.2
VideoFPS 0.3
VideoResolution 736x414
VideoCODEC avc1.77.31

harddrive
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Re: Help Analyzing Webcast Data

Postby harddrive » Mon Aug 29, 2016 10:26 am

I can't look at your document from my current location. However, I agree with lajackson. You need to determine your bandwidth availability at the stake center. That is where I would start. Then you need to make the stream of the teradek less than what the amount of bandwidth you have available to you. It will be the upload speed that you will want to focus on, because some places only give you like 1 megabits/sec up and 10 megabits/sec down. Then turn off all WIFI in all buildings and give the test again.

Finally the audio coming in should be good and strong. In our stake center, I have it coming directly off the chapel amplifier. So I will look at the document either tonight or tomorrow night and see what you are seeing.

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pete.arnett
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Re: Help Analyzing Webcast Data

Postby pete.arnett » Mon Aug 29, 2016 10:37 am

our webcast
Audio Info Data Rate: 96.0 Kbps, your webcast shows Audio Data Rate: 48 Kbps

Also, our upload speed was 7 Mbps

See attached firewall usage information
Attachments
Fayetteville Georgia Stake Center.jpg
(94.32 KiB) Not downloaded yet

harddrive
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Re: Help Analyzing Webcast Data

Postby harddrive » Mon Aug 29, 2016 11:27 am

Pete, not to get this thread side tracked, but I don't see where you are getting a 7 megabits/sec upload on your image. I see the maximum upload at one point was 2 megabits/sec on 12 Mar 2016. Now you may have a connection that allows up to 7 megabits/sec, but based on what you have shown, you have never come close to that number.

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pete.arnett
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Re: Help Analyzing Webcast Data

Postby pete.arnett » Mon Aug 29, 2016 11:47 am

Oops
Was trying to provide information from another webcast (our webcast) from another stake
That as it has been pointed out, that you need proper upload speed, our webcast upload speed was 7 Mbps
That we had most of the same event parameters and we had no issues

richphillips
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Re: Help Analyzing Webcast Data

Postby richphillips » Mon Aug 29, 2016 1:18 pm

Brethren:

Thanks for the speedy replies. When we did the test, it was at night and I and my companion were the only ones in the building. I don't think the wifi was an issue during the test. We plan to turn the wifi off during our actual webcast.

I think you are getting me on the right track. I did several OOKLA speed tests just now. I am the only one in the building and there is no wifi load. The download speed ranged from 1.78Mbps to 1.99 Mbps depending on the server it hit. I did not check the line speed before the test I talked about previously, but the vidiu suggested set it at "medium" quality based upon the line speed it checked. Does the vidiu suggestion usually follow what happens in realtime? Or is it overly optimistic?

The Church literature is confusing to me. In the overview it states that 2 Mbps should be good for medium quality (500k). In the vidiu setup it says 1.5 Mbps should be good for medium quality 700k.

I guess regardless of what is says, it appears that 1.8 will not send reliable medium quality video.

Should I set the vidiu to "low" for broadcast quality, or go back to the FM group to get the upload speed on the line increased? If an increase, what would be the best speed to request? We have standard definition camera.

Looking forward to your responses.........thanks

russellhltn
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Re: Help Analyzing Webcast Data

Postby russellhltn » Mon Aug 29, 2016 1:23 pm

It's not just the speed, but the consistency. That's probably why you're seeing different recommendations.
Have you searched the Wiki?
Try using a Google search by adding "site:tech.lds.org/wiki" to the search criteria.

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pete.arnett
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Re: Help Analyzing Webcast Data

Postby pete.arnett » Mon Aug 29, 2016 1:26 pm

Suggest you ask your friendly Facilities Management Group (FMG) to see what they can do for your stake


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