Archive for the ‘Studio’ category

Video Servers

May 12th, 2012

air_smallOur Matco servers have been acting up lately. Our original one is several years old and acts up now and then. A client of ours got a Matco more recently but has stopped using it so we switched over to that one but that too has been going or driving us nuts. When to clips are back to  back the second one does not play for some reason. the server just stops and we switch to the default input on the switcher.

We are planning to have one or the other serviced by Matco but the decision was made for us by PG&E, when we lost power (see next post or two) it killed the power supply on our Matco. So it’s down.

single-channel_smallBut a friend of mine has been looking at a newer server company called Cinegy, a newer automation / video server software package. I saw them at NAB 2012 and they seems very friendly and helpful. They offer a free demo, it comes with no limitations, just a key over the output channel. This way you can really get to know the product before laying down your bucks.

My friend has been looking at the product and likes it, which makes me think it could work for us. It can do several output channels at once and you can get a CG program for it but thats a bit pricey for us.

Maybe even use the old Matco box to run this in, but I think I  would prefer a new box with lots of storage.

We could sell all our old equipment and just have a couple of these with a network to ship files around the studio. I think this could work out really well.

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Two for One

May 12th, 2012

Our client that feeds us via a Fiber Line from The Switch with an SDI with Embedded audio now wants to send us two separate signals. As I understand it, it’s just a delayed Satellite feed that could be done at the transmitter. But they seem to want control, don’t we all.

So I told them the only way was either rent another Fiber line to us or use two encoders and mux them together and then have two decoders up here to get the two separate programs. I know our old ASI/SDI fiber converters would do either one, ASI or SDI. But the new box AT&T is using is different and I don’t know if it handles ASI, have to ask.

I told then it would be a few thousand to do this. I will keep you informed.

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Electrical Power

May 12th, 2012

Colors for your TXOur power company needs to do work on one of the two feeders coming up to the tower, so they want to switch it off and let us run on the other feeder. We had meetings and they agreed to bring up generators (well sound insulated ones) to replace the missing feeder for the few days they are working. Thats good news for me because unlike everyone else at the tower I only have a connection to one of the services, the one they want to take down.

So I have to go off for an hour while they hook up the generator and again when they disconnect it, much better than a few days of being down.

The power company told us they were going to do a test on that feeder before the work but that it would not affect us, okay.

Thursday service 2 went down. I got a call from the boss telling me we were off the air, I was picking up my son from school so I collected him and we went to the tower. As I pulled into the parking lot I got a call from the power company telling me it was them, the feeder was down and they were working on it.Okay, at least it was not me.

Now we had our test, all stations were running on service 1 and it held just fine. We had scheduled a test to put everyone on service 1 on an upcoming night but now maybe we don’t need to. In an hour power was back and my trusty Thomson DCX Millennium came back on it’s own, with me pushing any buttons. The video servers where another thing.

I like it when it’s not my fault.

After the boss’ call about being off the air I got a call from U-verse asking what was wrong, they’re  very good at letting me know I’m off the air. After I was on my way home I got another call from them, I always know it’s them, there’s no one else in Kansas that calls me. This time they let me know I was missing one channel of audio. So I turned around, after dropping my son off at home and came back up.

I could see one channel was low, tried switching the master control switcher to exercise the contacts but that did not do it. Checked the encoder, it seemed fine. Then I switched the Left – Right inputs to the Audio Encoder and the channels were balanced, I switched them back and still they were good. No idea what that was.

Now we had pictures and two channels of audio. I went home.

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Master Control in a Box w/ASI Out?

April 12th, 2012

Right now over on LinkedIn Broadcast Engineering & Tech Professional section they are commenting on a question submitted asking what options there are for getting an all-in-one Master Control in a box that has integrated encoders and ASI output. There are quite a few responses but it looks like the answer is no. Check it out as someone may have a new answer and many products are mentioned.

MCR w/ ASI out

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The 6 TB Hard Disk

April 7th, 2012

It seems that Seagate had achieved a breakthrough in magnetic information density, they have reached 1 Terabyte per square inch. What this means is that they can start making 6 TB 3.5″ hard disk ands 2 TB 2.5′ note book hard disks. The current density is about 620 Gb per square inch which give us the 3TB hard disk. Remember with 6TB on one disk that means you can loose 6 TB with a single drive failure so backup becomes even more important.

Read about it in Hearst Electronic Products DYI section.

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Master Control in a Box, with ASI out?

April 7th, 2012

There’s a discussion going on over in the Broadcast Engineering and Technical Professionals section of LinkedIn where someone is looking for a solution to adding a single cable channel play out system with an ASI output. Their hoping for a single box answer but none seem to fit the bill. It’s interesting to hear what other broadcast engineers have to say about different play out systems.

Take a look here at “ASI Out of Master Control “Channel-In-A-Box?”

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Small Drives and Disk Formats

March 17th, 2012

Tiny USB Drive

One of our clients brought up a USB Memory Stick with their program on it. We use MPEG 2 files for playback on our server. But this was a new client and had never sent us a file before. I had them send me a small test file so I could look at it first. It was an MPEG 2 video file alright but the audio was encoded as AC-3 (Dolby Digital), that would not play on our server, you’d have video but no audio. I told them and they sent me a new test file which had the required Layer 2 audio.

So they sent us the USB with their program on it, the operator got and but could not open the drive. I knew what it was right away, they had formatted the USB drive on a Mac and made it a Mac drive, our server is PC and they don’t know Jack about these. So I took it home and transferred the file to my Mac and reformatted the USB drive as a PC-DOS (FAT) drive. I then tried to put the file back on the drive, it would not go, it was too big. The file was 4.9 GB and PC FAT (File Allocation Table) only handle up to 4GB sized files. So that wouldn’t work.

Then on my Mac I noticed another disk format option, ExFAT. I did not know what this was but it sounded like it was a PC format that was extended, for bigger files. So I formatted the 16GB USB drive using the ExFAT format and then the file fit on it. I took it  to the station and plugged it into the server and, no go, the server did not recognize the drive, asked if I wanted to format it.

Okay, back to my Mac and formatting the USB as a PC-DOS (FAT) disk. Now I knew why our other clients alway cut their 1 hour programs into two 1/2 hour shows, to make them small enough to fit within the file size limits of Window. I wound up buying a $35 program that let me edit MPEG-2 files, I cut the program in half and got the two smaller halves on the DOS disk and then onto the server, where they played out nicely.

I found out that the ExFAT disk format is new and from Microsoft, they developed it just for USB drives to allow them to handle the larger file sizes now in common use. Read more about ExFAT here.

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QPT to the rescue!

March 1st, 2012

David at work

David Kattan comes around about once a year to service our ATS (Auto Transfer Switches) for all the stations at the tower. Your ATS is probably something you don’t think much about, until it fails!

David told me about the customer that wanted his ATS serviced and when David told him to shut down the power the customer said “fine, I’ll just switch over to my backup”, David pointed out that that’s what he was going to work on. The thing that allowed him to switch to the backup power source is the ATS. David also told me he has worked on ‘Hot”‘ ATS, doing all he can but not servicing the working parts.

Remember that your ATS not only switches to an alternate power source but many times starts your generator too. Your complete AC power system should be checked at least once a year to prevent costly failures.

When was the last time you had your ATS serviced?
And don’t forget the studio.

QPT (Quality Power Testing)

http://www.qualitypowertesting.com

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Ranting about Media Files

February 25th, 2012

The other day a fellow engineer was sharing his thoughts on media files used in broadcasting and his station in particular, he was ranting. His station has logo inserters and the guy who does all the artwork for them can’t seem to keep straight that what looks good at 700 by 700 pixels may not look good at 40 by 40 pixels. He says it always take the guy about three try’s before the logo looks good.

Then when they want a new News open or some other motion graphic they always get the wrong file format from their creative service’s guy. When they complain that it’s the wrong format this guys says “it’s 1920 by 1080 60I, what do you want?” and they have to tell him, again, that their servers need it in MPEG2 format, not AVI.

With servers just a few years old the types of file formats they can accept is not upto date, and even the latest video server that does accept more formats still has to be made compatible with the older ones so files can be shared across all the servers they have. He told of the head Mucky Muck up in corporate stating that all video submitted for air must follow his standards for frame sized and file format. Well the advertisers had their own ideas and continued to provide whatever format was convenient to them, their paying the money so you convert, seems to be their motto. Then theres the shows that arrive in various formats and need to be converted before air and this falls to the engineering department since they seem to be the only ones who understand what is required.

My friend longed for the days of NTSC, where there was only one true format. You could manipulate any file you wanted within your graphics box or NLE but everyone knew that the final output had to be, NTSC.

NTSC is dead, long may we pull our hair out over the wrong file or frame format.

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Fiber from a Client

February 23rd, 2012

Fiber in - SDI out

One of our clients has setup a studio / control room of their own. Up until now we had to run their server and sat feed because there was no link between them and us at the transmitter. Now AT&T via The Switch (thanks Linda) has put in an SDI F/O link from our clients’s place in the heart of the city to the transmitter. When we get our stuff together we’ll have it moved to our studio.

So, the AT&T guy shows up and does our end, which is in our telco room right where the

Telco Room Patch to my TX

interconnect system the guys and I have been working  on is. All I have to do is put in a 12 foot cable from the F/O RX to the patch panel that goes to my room and then connect the TX room panel to my SDI monitor.

TX end of it

Much to my surprise it work, just kidding, Marty and Bill have done a great job. I thought it was appropriate that my station was the first to use this new interconnect system.

Now for this first test AT&T sent us color bars and when I punch it up I see that it’s 1080 / 50I. 50 frames, where are they getting this from, France? Well it worked just fine and the next day our client had a feed for us. But is was just black SD-SDI. Good thing the monitor displays the format. I switched it over to crosshatch so I could see the embedded audio in the horizontal blanking. I had them pull the feed a couple of times to be sure it was them. It was.

These new F/O receivers AT&T are using hold up to 4 RX but have no provision for audio, the tech says you can get it as an option.

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