When a show is made, it has to be recorded on the camera and then sent into the PC for editing…
What type of file is exported? my only guesses could be .mkv or .avi, unless it is some type of DVD file which the channel puts on the air
anyone know? im just curious
There is no “file-type” for analog, because it’s not digital. For actual digital television, it’s probably not going to be .avi. Honestly I don’t know and couldn’t care less.
I doubt anything is physically transported in analog forms anymore these days. When show producers create an episode of a show, they export it to a digital encoded format, which may have the DVD container (DVD is a huge container format, video codec could vary depending on the quality & resolution picked). Then channels just broadcast the raw format or transcode it to something else and add logos or whatever to it.
yeah, that makes sense
I was actually at the Viacom NOC where they beam out all their shows to their 100 some odd channels. I’m not sure exactly what format they use but I know they use GIANT SATELLITE DISHES to beam their stuff to the cable companies.
So if I were you I’d try thinking like a GIANT SATELLITE DISH and think about what format you’d want all up in your parabolic grill.
I’ve done some production work for local channels - and what they aired was straight from a DVD we sent to them, so I assume raw video format or AVI.
haha thats nobody - it all makes sense now
and dan, so they just pause it play commercials? or does the channel split it into its appropriate pieces?
Maybe you can gather some information concerning possible “file types” from these links
OLD:
NEW for Digital:
More info/links to sort through
You could also try contacting your local TV station or national stations and ask for their video “File Type” requirements when submitting etc…
thanks for the links prg9, it seams like they all very raw, large file formats are used. nothing like avi/mkv or any “simple” filetype like that
Once and a while you can tell its a dvd because it sort of skips a bit during movies. :lol:
[ot]Whats better is all the “Filler” video they have. It would probably be one of the best jobs ever just going around finding random stuff to video tape (Anchor: can you go video tape a bunch of kids playing at recess… better yet you might want to hide in the bushes so they don’t look at the camera while your doing it. Have fun)[/ot]
^:look: If I ever see someone hiding in bushes videotaping my kids, I’ll club them to death like a seal.
@TJK, they have commercial reels queued up on a different medium, and they flip from feed to feed to go to/from commercials.
There’s no way they use raw formatting. A raw video, say assume DVD quality (720x480 pixels @ the lowest 24-bits/rgb channel @ 25fps), would be 78MB per second. A regular tv show at 22 minutes would be 103 gigabytes. Why do that when they have to transcode it before airing anyway?
@Dan, that is amazing to me, seams so “old-school”. i would of thought it is all pre-made with commercials and played straight off of a computer
mini DV tape is industry standard for filming, now High Def/ “betacam” is creeping in, some digital cameras
they still use tape for practical reasons
I was at a film house a while back so it may have changed but I doubt it
That comment alone made this thread worth reading 
:lol: Thanks. For real, though, if they’re broadcasting from a DVD then a 22 minute show would be less than 4.4 GB in size. I think that the AVIs we rendered out were only about 1.5 GB total, so it’s not raw video but DVD compressed video. It was a super low budget local station - I’m sure that the big dogs like the networks can broadcast analog, digitally or however the hell they want.
I did some consulting work on a broadcast video server once. I don’t remember the in-depth details, but the video was stored on the server in a proprietary format based on M-JPEG. The master control would queue up the segments which would then be transcoded for analog broadcast (I am less familiar with this part of the process). There was a lot of custom FPGA based hardware to make this happen very quickly, and the server itself was running VxWorks (a “real-time” operating system).
I don’t think many stations use this product anymore however so I doubt this is the norm.
@ethant, that is is how i imagined it myself (use of big server)
@dan, yeah haha, im sure they do crazy stuff just cause they hav the money to 
We use Wasp 3D (developed by our company Beehive Systems) for broadcasting in real time. The data is stored in a templatized format as a .wsp file (A wasp template file basically). This template, when queued to be sent on air, is encoded in an MPEG-2 or MPEG-4 format or using H.264 compression format or an advanced profile in WMV Pro format. The compression algorithm chosen depends upon the channel really, rather than our decision because we produce the software and motion graphics for the clients with live video feed playback capabilities and stored video playback as well, all in realtime.
This encrypted data is then sent through RF, MW etc. depending upon the factors the specific client channel has available. When this signal reaches a television, it is decrypted and displayed on your screen. The result is a lossy format, of course.
Also, I am still not very sound conceptually with how all this works, but this is the rough sketch of things.
[QUOTE=randomagain;2351749]mini DV tape is industry standard for filming, now High Def/ “betacam” is creeping in, some digital cameras
they still use tape for practical reasons
I was at a film house a while back so it may have changed but I doubt it[/QUOTE]
Mini DV tape is DEFINITELY not the industry standard for filming. And it’s like any kind of support, there is no specific format associated with it (you can put DV but also HD on a mini DV tape)
The tapes used in loads and loads of tv stations were the Betacam (then Betacam SP, and Digital Betacams are still widespread) the first betacam was already VHS on steroids. Today most big tv stations have moved to full digital production with many, many proprietary formats (as mentioned by Phenex) which most of the time involve loads of metadata (easier to index). My guess would be that they store uncompressed or lossless data digitally. They broadcast compressed digital signal (DTV, digital television), most of the times in mpeg2 (the DVD format).
Broadcasters may (and often do) combine many lower resolution data casts to their DTV signal (be it video, audio, or data).
For analog (old =) ) TV, compression is in the signal (this is where you get PAL NTSC etc…)
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